Common Security Engineer Interview Questions to Know

1

How would you handle a situation where a developer disagrees with your security recommendation?

Reference answer

In such a situation, open communication and collaboration are key. The candidate should discuss their approach to understanding the developer's perspective and clarifying the rationale behind their security recommendation. They might talk about presenting evidence or data to support their position and being willing to find a compromise that addresses both security and development needs. Evaluators should look for candidates who demonstrate empathy, negotiation skills, and the ability to maintain positive relationships while advocating for security best practices. A strong response will highlight the candidate's commitment to fostering a security-first culture within the development team.

2

How do you ensure compliance in multi-cloud environments?

Reference answer

“Multi-cloud compliance requires standardized processes and consistent tooling across platforms. In my last role managing AWS, Azure, and GCP environments, I implemented a centralized compliance framework using tools like Chef InSpec for configuration management and Prisma Cloud for cross-platform security monitoring. I created standardized security baselines that could be applied across all three platforms, focusing on common controls like encryption, access management, and logging. For GDPR compliance specifically, I ensured consistent data classification and retention policies across all clouds, and I set up automated compliance reporting that aggregated findings from all platforms into a single dashboard for our auditors.”

3

Design a secure authentication service for a web application.

Reference answer

I would design a secure authentication service using the SALT framework. Scope: B2C web app with millions of users, supporting password-based login, SSO, and MFA. Compliance with GDPR. Assets: User credentials, session tokens, PII. Threats: Credential stuffing, token theft, session hijacking, brute force. Layers: Identity layer using OAuth 2.0 with PKCE, OIDC for authentication, and MFA (TOTP or WebAuthn) for all users. Network layer with TLS 1.3, rate limiting at the API gateway, and a WAF. Data layer with AES-256 encryption for stored credentials, Argon2 for password hashing, and KMS for key management. Monitoring layer with centralized logging, anomaly detection on login patterns, and alerts on failed login thresholds. Tradeoffs: MFA adds friction, mitigated by risk-based authentication (MFA only for high-risk actions or unfamiliar devices). Performance impact of encryption is minimal with hardware acceleration. Cost of KMS is offset by security benefits.

4

What Do You Mean by Phishing? How Many Types of Phishing Are There?

Reference answer

Phishing is a type of cyberattack in which communications that appear trustworthy contain content that installs malware on a target's device or directs a target to a malicious website. While email phishing is perhaps most common, other types of phishing exist as well. Spear phishing pursues specific targets within an organization and uses real information to convince targets that the malicious communication is an internal request from the organization, thereby increasing the chances that the target will access the malware disguised in the communication. Whaling is a type of phishing that targets C-suite executives, and smishing is a phishing attack conducted via text or SMS. From vishing to pharming, over ten different kinds of phishing exist—and the list continues to grow.

5

What is Replay Attack?

Reference answer

A replay attack is a type of cyberattack where an attacker intercepts and retransmits valid data or authentication messages to trick a system into granting unauthorized access. The attacker does not need to decrypt the data but simply reuses it. - Common in network authentication and communication systems - Can be prevented using timestamps and unique session tokens - Often targets authentication protocols and secure transactions

6

What is a disaster recovery plan?

Reference answer

A disaster recovery plan is a set of procedures that outline how an organization will recover from a disaster or major outage.

7

What is a botnet?

Reference answer

A botnet is a network of compromised systems that can be controlled remotely to conduct DDoS attacks, send spam, or steal sensitive information.

8

Can you explain the importance of logging and monitoring in cloud security?

Reference answer

Logging and monitoring are essential for maintaining visibility into cloud environments, enabling timely detection and response to security incidents. By using tools like AWS CloudWatch and Azure Monitor, we can continuously track and analyze security events, ensuring compliance and a robust security posture.

9

Explain the challenges and solutions in endpoint detection and response (EDR)

Reference answer

Issues Various devices: It is difficult to secure all sorts of gadgets Excess information: There is a lot of data to look through from endpoints Cunning attackers: Some attacks are really sneaky and very hard to notice Solutions Innovative tools: EDR things can see and respond to issues immediately Studying suspicious behavior: We combine EDR with other security solutions to enhance overall safety Collaboration: We integrate EDR along with other security tools for better protection.

10

What is the difference between a vulnerability and an exploit?

Reference answer

Here are the differences between a vulnerability and an exploit: | Vulnerability | Exploit | | It refers to a system, application, or network weakness that can be exploited. | It is a specific method or technique used to exploit a vulnerability. | | They arise due to software bugs, misconfigurations, design flaws, or other factors. | Attackers create or discover them to gain unauthorized access, execute malicious code, or perform other malicious activities. | | They are unintentional and often unknown until discovered. | They leverage vulnerabilities to achieve their objectives. |

11

How do you use Wireshark for network analysis?

Reference answer

Wireshark captures and inspects network packets to identify anomalies, such as suspicious traffic, protocol errors, or unauthorized connections.

12

How would you write a script to parse logs for security events?

Reference answer

I would use Python with libraries like re or pandas to read log files, extract relevant patterns such as failed login attempts or suspicious IPs, and generate alerts.

13

Tell me about a time when you had to pivot a project plan due to a change in security requirements. How did you handle the situation?

Reference answer

There was a time at my previous job when we were working on a critical infrastructure project for a client. We were midway through the development process when a new regulation was introduced that required us to adopt stricter security measures for specific data types. I immediately gathered my team to discuss the implications and strategize on how to integrate the new security requirements into our project. We assessed the potential impact on the project timeline and determined that it would be possible to implement the changes without drastically affecting the schedule. I delegated tasks among team members, ensuring that everyone was aware of the new security requirements and their role in implementing the changes. We also collaborated closely with the client to keep them informed about the situation and our plans to address it. By being transparent, we were able to maintain their trust and confidence in our ability to deliver the project as expected. Throughout the process, I made sure to regularly check in with team members on their progress and provide guidance as needed. Ultimately, we were able to pivot the project plan effectively and deliver a solution that met the new security requirements without compromising the timeline. This experience taught me the importance of being adaptable and having a proactive approach when it comes to addressing security changes in a project environment.

14

How does it work?

Reference answer

A firewall works by inspecting packets or data streams and comparing them against a set of rules. It can operate at different OSI layers: packet filtering firewalls check headers (IP, ports), stateful firewalls track connection states, and application-layer firewalls (like proxies) inspect content. Based on rules, it either permits, drops, or rejects traffic.

15

Can you describe your experience with cloud security frameworks and standards, such as NIST, ISO 27001, or CIS benchmarks?

Reference answer

In my previous role, I implemented ISO 27001 standards to enhance our cloud security posture, ensuring compliance and reducing risks. Additionally, I conducted regular audits using CIS benchmarks, which significantly improved our system's resilience against potential threats.

16

What are some common misconceptions about cloud security that you encounter?

Reference answer

One common misconception is that cloud security is solely the provider's responsibility. In reality, it's a shared responsibility, requiring proper configuration and management by the customer to ensure a secure environment.

17

What is the primary role of a Senior IT Security Engineer?

Reference answer

The main role is to design, implement, and manage security infrastructure while ensuring compliance with organizational policies. A Senior Engineer leads vulnerability management, incident response, and security automation efforts, often working with other teams to secure applications, networks, and data.

18

What is the concept of federated identity management?

Reference answer

Federated identity management can be achieved by enabling users to employ a single sign-in for multiple systems. Such an arrangement is meant to simplify such tasks besides enhancing security as the user does not have to grapple with multiple passwords and all the checks are done in one place.

19

Authentication vs Authorization. Explain with examples.

Reference answer

Focus: Identity clarity Core Idea: Most security bugs are access bugs Strong Answers Cover: • Clear boundary between identity and permissions • Real production failures caused by confusion • How mistakes scale quietly • Developer ergonomics vs safety

20

What is cloud-based cloud security analytics?

Reference answer

Cloud-based cloud security analytics is a solution that provides real-time insights into cloud security threats and risks using advanced analytics and machine learning.

21

What Is Referred to as a Man-in-the-Middle Attack?

Reference answer

A man-in-the-middle attack occurs when a bad actor interferes with communications between two parties and monitors or manipulates the traffic traveling between them. Man-in-the-middle attackers are able to passively eavesdrop on the connection or actively intercept the connection in order to reroute traffic to another destination. The goal of such attacks may be to steal information or corrupt data, among other motivations.

22

What is the NIST framework and why is it influential?

Reference answer

The NIST Cybersecurity Framework is a set of guidelines and best practices developed by the National Institute of Standards and Technology to help organizations manage cybersecurity risk. It is influential because it provides a common language, is widely adopted across industries, aligns with other standards (e.g., ISO 27001), and offers a flexible, risk-based approach to improving security posture.

23

How does the kernel know which function to call for the user?

Reference answer

The kernel knows which function to call for the user through system calls. When a user-space program requests a service (e.g., opening a file), it invokes a system call by executing a special instruction (e.g., syscall or int 0x80). The CPU switches to kernel mode, and the kernel uses a system call table (e.g., sys_call_table) to dispatch the request to the appropriate kernel function based on the system call number.

24

What is a cloud-based cloud workload protection platform (CWPP)?

Reference answer

Cloud-based CWPP is a solution that protects cloud-native applications and workloads.

25

What is the difference between a vulnerability and an exploit?

Reference answer

- Vulnerability: A vulnerability is an error in the design or implementation of a system that can be exploited to cause unexpected or undesirable behaviour. There are many ways a computer can become vulnerable to security threats. A common vulnerability is for attackers to exploit system security vulnerabilities to gain access to systems without proper authentication. - Exploit: Exploits are tools that can be used to exploit vulnerabilities. They are created using vulnerabilities. Exploits are often patched by software vendors as soon as they are released. They take the form of software or code that helps control computers and steal network data.

26

Can you explain SOC 2?

Reference answer

SOC 2 (System and Organization Controls 2) is an auditing standard developed by the American Institute of CPAs (AICPA) for service organizations. It assesses controls related to security, availability, processing integrity, confidentiality, and privacy (the five trust criteria). A SOC 2 report provides assurance to customers that the organization has appropriate controls in place to protect their data.

27

What is a cloud-based security operations centre (SOC)?

Reference answer

A cloud-based SOC is a centralized unit that monitors and responds to security incidents in cloud environments in real time.

28

What is a certificate authority (CA)?

Reference answer

A CA is an entity that issues digital certificates to verify the identity of individuals, organizations, or devices.

29

What do you mean by Shoulder Surfing?

Reference answer

Shoulder surfing is a form of physical assault that entails physically peering at people's screens while they type information in a semi-public space.

30

How do you approach a security incident?

Reference answer

When it comes to approaching a security incident, my first priority is to quickly contain the threat to prevent any further damage. This involves identifying the source of the breach and isolating the affected systems or data. Once the threat has been contained, I move on to investigating the incident to determine the extent of the damage and collect any evidence that can help prevent similar incidents in the future. This includes analyzing system logs, reviewing security policies and protocols, and working with any other relevant teams. During this process, I document everything thoroughly to ensure that all parties involved have a clear understanding of what occurred and how it was handled. This documentation can also prove useful in the event of any legal or compliance issues that may arise. After the investigation is complete, I use the information gathered to implement any necessary improvements or updates to our security protocols. This may involve updating software and hardware or providing additional training for employees to prevent similar incidents from occurring in the future. To give you an example, in a previous role I was the lead on a team that responded to a ransomware attack. Our first step was to disconnect the affected devices to prevent the malware from spreading. We then performed a full analysis of our network logs to determine the scope of the attack and identify any other potential vulnerabilities. Based on this analysis, we made improvements to our software security policies and provided additional training to our employees to prevent similar attacks in the future. As a result of our swift response and thorough investigation, we were able to prevent any further damage and ensure that our systems were secured going forward.

31

What is VLAN? And what are the differences between a VPN and a VLAN?

Reference answer

The VPN is a remote access network with an encrypted and secured tunnel. A VPN prevents hackers from accessing the network and doesn't allow people to capture the data packets. Meanwhile, the virtual LAN (VLAN) is a broadcast domain that is isolated within a computer network at the data link layer. Using a VLAN, we can group work stations that aren't found in the same location as the broadcast network. A VLAN doesn't require or involve encryption and it can divide networks without physically segregating the switches.

32

What is a SQL injection attack and how does it work?

Reference answer

A SQL injection attack occurs when an attacker manipulates input fields to execute unauthorized SQL commands, potentially accessing or modifying database contents.

33

How do you prevent ARP spoofing attacks in a network?

Reference answer

In my experience, preventing ARP spoofing attacks in a network involves a combination of techniques and tools. One effective method I like to use is implementing Dynamic ARP Inspection (DAI). DAI is a security feature that validates ARP packets in a network and helps prevent ARP spoofing by blocking invalid ARP requests and responses. Another technique is implementing static ARP entries on critical devices, which helps ensure that the IP-to-MAC address mapping remains constant and cannot be manipulated by an attacker. However, this approach can be difficult to manage in large networks. I also recommend using network segmentation to limit the scope of potential ARP spoofing attacks. By isolating sensitive areas of the network, the potential impact of an attack is reduced. Lastly, it's crucial to monitor the network for unusual ARP activity and to have incident response plans in place. This helps to quickly identify and address potential ARP spoofing attacks.

34

What do you mean by two-factor authentication?

Reference answer

Two-factor authentication refers to using any two independent methods from a variety of authentication methods. Two-factor authentication is used to ensure users have access to secure systems and to enhance security. Two-factor authentication was first implemented for laptops due to the basic security needs of mobile computing. Two-factor authentication makes it more difficult for unauthorized users to use mobile devices to access secure data and systems.

35

What is a cloud workload protection platform (CWPP)?

Reference answer

A CWPP is a security solution that protects cloud-native applications and workloads.

36

You've inherited a legacy authentication system. What would you upgrade first?

Reference answer

I would prioritize upgrades based on risk: First, I would implement multi-factor authentication (MFA) for all users, especially privileged accounts, to immediately reduce the risk of credential theft. Second, I would replace weak password hashing (e.g., MD5, SHA-1) with a strong algorithm like Argon2 or bcrypt. Third, I would enforce TLS 1.2 or higher for all authentication traffic to prevent credential interception. Fourth, I would add rate limiting and account lockout policies to prevent brute-force attacks. Fifth, I would implement centralized logging and monitoring for authentication events. Finally, I would plan a migration to a modern protocol like OAuth 2.0/OIDC to support SSO and better security controls. Each upgrade would be rolled out with careful testing and rollback plans.

37

Here's a function handling authentication. Are there any vulnerabilities?

Reference answer

Without seeing the specific code, common authentication vulnerabilities I look for include: weak password policies, hardcoded credentials, storing passwords in plaintext or using weak hashing (e.g., MD5, SHA-1 without salting), improper session management (e.g., predictable session tokens, no expiration), lack of multi-factor authentication, timing attacks on login comparison, account enumeration (e.g., different error messages for valid vs. invalid usernames), insufficient brute-force protection, and insecure password reset flows. I would also check for logic flaws, such as allowing authentication bypass by manipulating parameters or cookies.

38

What would you do if you were alerted to a hacking attempt or breach?

Reference answer

Demonstrates candidates' problem-solving skills and their ability to remain calm under pressure.

39

What Is ARP Poisoning? Can You Explain With an Example?

Reference answer

ARP poisoning is a type of cyberattack that aims to interrupt, redirect, or covertly monitor network traffic. The ARP (address resolution protocol) establishes IP-level connections to new hosts by accepting requests from new devices to join the LAN (local area network) and provides an IP address. The ARP also translates the IP address to a MAC address and sends ARP packet requests to query appropriate MAC addresses to use, which saves time for network administrators. After sending fabricated ARP packets to link an intruder's MAC address with an IP of a device already connected to the LAN (known as ARP spoofing), a hacker can initiate ARP poisoning by changing the extant ARP table to contain falsified MAC maps. A successful ARP poisoning will link the attacker's MAC address with the target's LAN, rerouting incoming traffic to the attacker.

40

What is SSL and how is it used?

Reference answer

SSL stands for Secure Sockets Layer. It's a type of technology used to protect the information in online payments and transactions by creating and using encrypted connections between a web browser and a web server. SSL certificates are used to provide data privacy.

41

What's your approach to cloud identity and access management (IAM)?

Reference answer

“My IAM strategy centers on the principle of least privilege and automation. I typically start by mapping out all user roles and required permissions, then create custom policies that grant only the minimum access needed. In AWS, I use IAM roles instead of long-term access keys whenever possible, and I've implemented automatic key rotation for cases where keys are necessary. I also set up regular access reviews using AWS Access Analyzer to identify unused permissions and overly broad policies. For privileged access, I implemented just-in-time access using AWS SSO with time-limited sessions, and I require additional approval workflows for high-risk operations.”

42

How do you harden a system?

Reference answer

System hardening involves reducing the attack surface by: removing unnecessary services and software, applying the principle of least privilege to user accounts and permissions, enforcing strong password policies, enabling firewalls, applying security patches regularly, configuring secure defaults, disabling unused ports, and implementing logging and monitoring. Specific steps vary by OS (e.g., Windows Group Policies, Linux CIS benchmarks).

43

Who are black hat, white hat and grey hat hackers?

Reference answer

- White Hat Hacker: A white hat hacker is a certified or certified hacker who works for governments and organizations by conducting penetration tests and identifying cybersecurity gaps. It also guarantees protection from malicious cybercrime. - Black Hat Hackers: They are often called crackers. Black hat hackers can gain unauthorized access to your system and destroy your important data. The attack method uses common hacking techniques learned earlier. They are considered criminals and are easy to identify because of their malicious behavior. - Grey Hat Hackers: Operate in a moral grey area, they may access systems without permission but often report flaws without causing harm.

44

What is cloud-based key management?

Reference answer

Cloud-based key management is a solution that securely manages encryption keys in cloud environments to prevent unauthorized access to encrypted data.

45

What Are the Most Required Cybersecurity Skills?

Reference answer

Cybersecurity professionals must have a strong command of the technical skills necessary to build secure networks, diagnose and resolve security issues, and implement risk management solutions. These skills include reverse engineering, application design, firewall administration, encryption, and ethical hacking.

46

Can you explain what threat modeling is?

Reference answer

Threat modeling is like a detective story for software. Imagine your software as a valuable treasure, and threat modeling is the process of identifying potential thieves and weak spots in your security system. The goal is to think like a hacker to better protect your assets. Look for candidates who can convey complex ideas in simple terms. An ideal response will demonstrate their ability to communicate technical concepts to non-technical stakeholders, showcasing their adaptability and clarity in communication.

47

How do you ensure compliance with regulations such as GDPR or HIPAA in a cloud setting?

Reference answer

In my previous role, I implemented robust data encryption and access controls to ensure GDPR and HIPAA compliance. Additionally, I conducted regular audits and training sessions to keep the team updated on regulatory changes and best practices.

48

What is SQL injection?

Reference answer

SQL injection is a type of vulnerability that occurs when an attacker injects malicious SQL code to extract or modify sensitive data.

49

You run vulnerability scans and find hundreds of high-severity findings. How do you prioritize?

Reference answer

I would prioritize based on a combination of factors beyond just CVSS score: 1) Exploitability—is there a known exploit in the wild? 2) Asset criticality—does the vulnerability affect a system that stores sensitive data or is internet-facing? 3) Business impact—what is the potential damage if the vulnerability is exploited? 4) Compensating controls—are there existing mitigations (e.g., WAF, network segmentation) that reduce risk? 5) Remediation effort—how quickly can the vulnerability be patched or mitigated? I would create a risk matrix to score each finding and focus on the highest-risk items first. I would also validate scan results manually to eliminate false positives before taking action.

50

How do you handle security for serverless architectures?

Reference answer

To handle security for serverless architectures, I implement strong access controls and IAM policies to restrict permissions. Additionally, I use monitoring tools like AWS Lambda and Azure Functions to detect and respond to threats in real-time, ensuring a secure and resilient environment.

51

How would you use threat intelligence in a SIEM?

Reference answer

I would integrate threat intelligence feeds (commercial, open-source, and internal) into the SIEM to enrich incoming logs with indicators of compromise (IOCs) such as malicious IP addresses, domains, hashes, and URLs. The SIEM would then correlate this intelligence with real-time events to generate alerts when a match is found. I would also use threat intelligence for prioritizing alerts—for example, an alert involving a known malicious IP would have a higher priority than one involving an unknown IP. Additionally, I would use threat intelligence to tune detection rules, such as blocking traffic from known command-and-control servers. Regular updates to the threat intelligence feeds are essential to maintain effectiveness.

52

What is the shared responsibility model in cloud security?

Reference answer

The shared responsibility model defines which security controls are managed by the cloud provider and which are the customer's responsibility. Securing cloud environments includes identity and access management, encryption, network controls, monitoring, and compliance with cloud-specific standards. Automation and Infrastructure as Code (IaC) tools allow consistent deployment of secure cloud configurations.

53

How do you manage security in a hybrid cloud environment?

Reference answer

The way to defend a hybrid cloud setup is as follows: Utilize the same security procedures in the cloud as within your organization. This means that every computer must have strong passwords (greater than 8 characters) along with automatic logout after some time if there is no user activity going on (say about 30 minutes maximum). Safeguarding our vital information throughout its entire lifecycle involves securing it while at rest or in transit(locking doors but leaving windows open). Whether data is sitting idle or on the move, it should be shielded from unauthorized access using encryption mechanisms like SSL/TLS during communication between points of presence. To make sure that only legitimate persons can access anything, use stringent authorization checks all over everything i.e. your files, your software projects,etc., by checking if they are who they claim to be. This involves developing stringent access-control policies that compel each user to authenticate themselves before gaining access to specific systems/resources.

54

How do you ensure compliance with industry security standards in a project?

Reference answer

Ensuring compliance with industry security standards involves staying informed about relevant regulations and guidelines, such as GDPR or HIPAA, and integrating them into the development process. Candidates should discuss conducting regular audits and security assessments to identify gaps and address them proactively. They might also mention implementing automated tools to monitor compliance and generate reports, ensuring that the project remains aligned with standards over time. Strong candidates will demonstrate a proactive approach to compliance, emphasizing their ability to translate regulatory requirements into actionable security measures. They should showcase their understanding of the importance of staying up-to-date with evolving standards in the industry.

55

Describe HTTPs and how it is used.

Reference answer

HTTPS (Hypertext Transfer Protocol Secure) is the secure version of HTTP, using SSL/TLS to encrypt communication between a client and a server. It is used to protect data integrity, confidentiality, and authentication during web browsing, online transactions, and any data exchange where security is required. It ensures that data sent over the network cannot be intercepted or tampered with.

56

What are the different types of networks?

Reference answer

The types of networks are LAN, WAN, WLAN, system area network, storage area network, personal area network, and Metropolitan.

57

Explain how you would implement automated security compliance checking in a CI/CD pipeline.

Reference answer

“I'd implement security checks at multiple stages of the pipeline. In the early stages, I'd integrate SAST tools like SonarQube for code vulnerability scanning and dependency checking tools like Snyk to identify vulnerable libraries. For infrastructure as code, I'd add tools like Checkov or TFSec to scan Terraform configurations for security misconfigurations. I'd configure these as required checks that must pass before code can merge. For container images, I'd integrate Clair or Trivy for vulnerability scanning and implement image signing to ensure integrity. I'd also add DAST tools like OWASP ZAP for runtime security testing in staging environments. The key is making feedback fast and actionable—failed security checks should provide clear guidance on how to fix issues, and the security team should be available to help developers understand and resolve findings.”

58

In the event of a data breach, what are the typical steps in the response process?

Reference answer

In the event of a data breach, a typical response includes several key steps. First, it's crucial to contain the breach to prevent further damage, which involves identifying the affected systems and disconnecting them from the network. Next, a thorough investigation should be conducted to understand the extent and impact of the breach. Gathering evidence and logs will help determine how the breach occurred and which data was compromised. Strong candidates will articulate the importance of communicating with stakeholders, including customers and legal teams, and implementing measures to prevent future breaches. Look for candidates who emphasize timely and transparent communication, a methodical approach to investigation, and a commitment to continuous improvement.

59

What is the role of a Security Engineer in an organization?

Reference answer

A Security Engineer plays a critical role in designing, implementing, and maintaining the security posture of an organization's IT infrastructure. Their primary objective is to protect digital assets, networks, applications, and sensitive data from cyber threats and vulnerabilities. They work proactively to anticipate potential attack vectors and deploy controls that minimize risks, collaborating with teams including IT operations, development, and management to ensure security is integrated at every stage of the technology lifecycle.

60

What is ransomware?

Reference answer

Ransomware is a type of malware that encrypts files and demands payment in exchange for the decryption key.

61

How does Kerberos work?

Reference answer

Kerberos is a network authentication protocol that uses tickets to allow nodes to prove their identity securely. It works with a trusted Key Distribution Center (KDC). The client authenticates to the KDC and receives a Ticket-Granting Ticket (TGT). To access a service, the client presents the TGT to the KDC to obtain a service-specific ticket, which is then presented to the target service for authentication.

62

What are the challenges in threat intelligence and vulnerability management?

Reference answer

Challenges include: volume of data making prioritization difficult without automation, patch delays due to business operations, false positives/negatives leading to wasted resources, tool sprawl causing inefficiencies, and lack of skilled personnel. Solutions include adopting automation and orchestration using SOAR tools, machine learning for accuracy, and collaboration platforms.

63

What is the role of automation in security engineering?

Reference answer

Automation is a critical enabler in security engineering. Infrastructure as Code (IaC) combined with automated security testing and deployment pipelines ensures that security controls are consistently applied and validated throughout the SDLC. Security automation tools include SAST, DAST, and SCA for scanning code and dependencies before deployment.

64

Explain the concept of least privilege in database security.

Reference answer

Least privilege means granting users only the minimum permissions necessary to perform their tasks, reducing the risk of unauthorized access or data breaches.

65

Describe a time when you identified a security vulnerability in a cloud application. What steps did you take to address it?

Reference answer

During a routine security audit, I discovered a misconfigured S3 bucket that was publicly accessible. I immediately restricted access, implemented proper IAM policies, and conducted a thorough review to ensure no data was compromised.

66

Draw a network, then expect them to raise an issue and have to figure out where it happened.

Reference answer

This is a scenario-based question. Typically, you would be given a network diagram with components like routers, switches, firewalls, servers, and endpoints. You would then analyze symptoms (e.g., connectivity loss, latency, packet drops) and systematically trace the issue using tools like ping, traceroute, and packet captures to identify the faulty device or misconfiguration.

67

What do you mean by Active reconnaissance?

Reference answer

Active reconnaissance is a type of computer assault in which an intruder interacts with the target system in order to gather information about weaknesses. Port scanning is commonly used by attackers to detect vulnerable ports, after which they exploit the vulnerabilities of services linked with open ports. This could be done using automatic scanning or manual testing with tools like ping, traceroute, and netcat, among others. This sort of recon necessitates interaction between the attacker and the victim. This recon is faster and more precise, but it generates far more noise. Because the attacker must engage with the target in order to obtain information, the recon is more likely to be detected by a firewall or other network security device.

68

How often do you conduct patch management?

Reference answer

I like to perform patch management as soon as it's released. From experience, I know that Windows patches are released monthly. I'd apply the patch to all of the organization's networks, devices, and servers within a month at most.

69

What is the purpose of TLS?

Reference answer

The purpose of TLS (Transport Layer Security) is to provide privacy, integrity, and authentication for communications over a computer network. It encrypts data to prevent eavesdropping, ensures data has not been tampered with, and optionally verifies the identity of communicating parties through certificates.

70

What are common tools used to secure a standard network?

Reference answer

Tools include firewalls, password managers, IDS and IPS, end-point antiviruses, as well as security policies and procedures.

71

What is an advanced persistent threat?

Reference answer

Advanced persistent threat is related to someone who breaks into a network and remains undetected for a long time hoping to access information or spy on activities.

72

Explain the OSI model and its layers.

Reference answer

The OSI model has seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application. Each layer handles specific network functions, from raw data transmission to application-level communication.

73

Define Botnet. Is It Crucial in Cybersecurity?

Reference answer

A botnet is a sophisticated, centrally coordinated malware-infected network controlled by a remote attacker. Each controlled device within this network is considered a bot. Large-scale botnets can consist of millions of bots, enabling cybercriminals to launch massive attacks. Botnets are capable of executing distributed denial-of-service attacks (DDoS attacks), brute force attacks, and more. The term "botnet" is shorthand for "robot network." Because botnets can cause extensive damage, combating these types of attacks is crucial in the field of cybersecurity.

74

How do you approach securing cloud infrastructure?

Reference answer

Cloud security requires a shared responsibility model approach where I focus on securing what's under our control. I start with identity and access management, implementing role-based access with the principle of least privilege and requiring MFA for all cloud console access. I configure security groups and network ACLs to restrict traffic flow and enable logging for all activities through CloudTrail and VPC Flow Logs. I use infrastructure-as-code tools like Terraform with security scanning integrated into our CI/CD pipeline. At my previous company, I implemented AWS Config rules to automatically detect security misconfigurations and used Lambda functions to auto-remediate common issues like publicly accessible S3 buckets. This reduced our mean time to remediation from hours to minutes.

75

What is a private key?

Reference answer

A private key is a cryptographic key that is used to decrypt data that was encrypted with a corresponding public key.

76

What is the STRIDE framework and what threats does it cover?

Reference answer

Spoofing (violates authenticity) Tampering (violates integrity) Repudiation (violates accountability) Information disclosure (violates confidentiality) Denial of service (violates availablity) Elevation of privilege (violates authorization)

77

What are the common Cyberattacks?

Reference answer

Common cyberattacks include various techniques used by attackers to compromise systems, steal data or disrupt services. - Phishing: A fraudulent technique where attackers send fake emails or messages pretending to be trusted sources to steal sensitive information such as passwords or financial details. - Social Engineering Attacks: Manipulating individuals into revealing confidential information by exploiting human trust rather than technical vulnerabilities. - Ransomware: Malicious software that encrypts a victim's files and demands payment in exchange for restoring access. - Cryptojacking: Unauthorized use of a system's computing resources to mine cryptocurrencies like Bitcoin or Monero. - Botnet Attacks: A network of infected devices controlled by attackers to perform large-scale malicious activities such as data theft or distributed attacks.

78

How do you approach cloud security architecture review?

Reference answer

“I approach architecture reviews systematically using threat modeling methodologies like STRIDE. I start by understanding the data flow and trust boundaries, then identify potential threat vectors for each component. For a recent microservices architecture review, I evaluated network segmentation, service-to-service authentication, data encryption, and access controls. I documented findings with risk ratings and provided specific remediation recommendations—for example, implementing mutual TLS between services and adding API rate limiting. I also consider the operational aspects like logging, monitoring, and incident response capabilities. The key is presenting findings in business terms, explaining not just what the risks are but how they could impact the organization.”

79

What are the main elements of cybersecurity?

Reference answer

They are: - Information security - Network security - Application security - Operational security - End-user security - Business continuity planning

80

How would you perform a threat model for a web application that processes personal data?

Reference answer

I would use the STRIDE framework. First, I would define the system scope and create a data flow diagram showing all components, data stores, and trust boundaries. Then, I would analyze each component for threats: Spoofing (can an attacker impersonate a user or service?), Tampering (can data be modified in transit or at rest?), Repudiation (are actions logged and non-repudiable?), Information Disclosure (is sensitive data exposed to unauthorized parties?), Denial of Service (can the system be overwhelmed?), and Elevation of Privilege (can a user gain unauthorized access?). For each threat, I would assess likelihood and impact, then propose mitigations such as authentication, encryption, logging, input validation, rate limiting, and access controls. Finally, I would document assumptions and residual risks.

81

What are your preferred tools for vulnerability scanning, and why?

Reference answer

My go-to tools for vulnerability scanning are Nessus and OpenVAS. I prefer these tools because they are reliable, efficient, and have a comprehensive database of known vulnerabilities. Nessus is a widely-used vulnerability scanner that has a large and frequently-updated database of vulnerabilities. In my experience, it's user-friendly, easy to configure, and provides detailed reports with actionable recommendations. It also supports various plugins, which helps in customizing the scans and extending its capabilities. OpenVAS is an open-source alternative to Nessus, and I find it particularly useful when working on projects with limited budgets. It has a comprehensive vulnerability database and provides regular updates. From what I've seen, OpenVAS is also highly customizable and can integrate with other security tools. Both of these tools help me identify vulnerabilities in systems and networks, allowing me to prioritize and address them effectively.

82

What does XSS stand for? How can it be prevented?

Reference answer

XSS stands for Cross-site scripting. It is a web security flaw that allows an attacker to manipulate how users interact with a susceptible application. It allows an attacker to get around the same-origin policy, which is meant to keep websites separate from one another. Cross-site scripting flaws allow an attacker to impersonate a victim user and execute any actions that the user is capable of, as well as access any of the user's data. If the victim user has privileged access to the application, the attacker may be able to take complete control of the app's functionality and data. Preventing cross-site scripting can be simple in some circumstances, but it can be much more difficult in others, depending on the application's sophistication and how it handles user-controllable data. In general, preventing XSS vulnerabilities will almost certainly need a mix of the following measures: On arrival, filter the input. Filter user input as precisely as feasible at the point when it is received, based on what is expected or valid input. On the output, encode the data. Encode user-controllable data in HTTP responses at the point where it is output to avoid it being perceived as active content. Depending on the output context, a combination of HTML, URL, JavaScript, and CSS encoding may be required. Use headers that are relevant for the response. You can use the Content-Type and X-Content-Type-Options headers to ensure that browsers read HTTP responses in the way you intend, preventing XSS in HTTP responses that aren't intended to contain any HTML or JavaScript. Policy for Content Security. You can utilize Content Security Policy (CSP) as a last line of defense to mitigate the severity of any remaining XSS issues.

83

How have you implemented multi-factor authentication in previous projects, and what were the primary benefits you observed from this approach?

Reference answer

I implemented MFA by integrating with existing identity providers like Azure AD or Okta, using methods such as SMS codes, authenticator apps, and hardware tokens. The primary benefits included a significant reduction in account takeover incidents, improved compliance with security standards, and enhanced user trust. MFA added an extra layer of defense even when passwords were compromised.

84

Describe your approach to implementing privileged access management (PAM).

Reference answer

I'd start by discovering all privileged accounts across our environment using automated tools to scan Windows, Unix, databases, and network devices for accounts with elevated permissions. I'd implement a PAM solution that vaults all shared administrative passwords and requires approval workflows for access requests. I'd establish just-in-time access where possible, automatically provisioning and de-provisioning privileged access based on approved requests with defined time limits. All privileged sessions would be recorded and monitored for unusual activity using user behavior analytics. I'd integrate the PAM solution with our SIEM to correlate privileged access with other security events. Regular access reviews would ensure privileges remain appropriate, and I'd implement break-glass procedures for emergency access with proper logging and approval processes.

85

What is the difference between authentication cookies and server-side sessions?

Reference answer

Auth Cookies: Client side. Sessions: Server side.

86

How does TLS protect network traffic?

Reference answer

TLS protects network traffic through encryption, authentication, and integrity. It uses asymmetric encryption during the handshake to securely exchange a symmetric session key, then uses symmetric encryption for the actual data transfer. TLS also uses certificates to authenticate the server (and optionally the client), and message authentication codes (MACs) to ensure data has not been tampered with during transit.

87

Explain social engineering and its attacks.

Reference answer

Social engineering is a hacking technique based on forging someone's identity and using socialization skills to obtain details. There are techniques that combine psychological and marketing skills to influence targeted victims and manipulate them into obtaining sensitive information. The types of social engineering attacks are given below: - Impersonation: This is a smart choice for attackers. This method impersonates organizations, police, banks and tax authorities. Then they steal money or anything they want from the victim. And the same goes for organizations that obtain information about victims legally through other means. - Phishing: Phishing is like impersonating a well-known website such as Facebook and creating a fake girlfriend website to trick users into providing account credentials and personal information. Most phishing attacks are carried out through social media such as Instagram, Facebook and Twitter. - Vishing: Technically speaking, this is called "voice phishing". In this phishing technique, attackers use their voice and speaking skills to trick users into providing personal information. In general, this is most often done by organizations to capture financial and customer data. - Smithing: Smithing is a method of carrying out attacks, generally through messages. In this method, attackers use their fear and interest in a particular topic to reach out to victims through messages. These topics are linked to further the phishing process and obtaining sensitive information about the target.

88

Explain what SSDP is.

Reference answer

SSDP stands for Simple Service Discovery Protocol, which is a network protocol that uses the internet protocol suite to discover network services and information and for advertisement purposes.

89

What are the key considerations when designing a secure cloud architecture?

Reference answer

When designing a secure cloud architecture, I prioritize implementing robust access controls and identity management, ensuring data encryption both at rest and in transit. Additionally, I regularly update and patch systems to mitigate vulnerabilities, maintaining a strong security posture.

90

Differentiate between spear phishing and phishing.

Reference answer

- Phishing: This is a type of email attack in which an attacker fraudulently attempts to discover a user's sensitive information through electronic communications, pretending to be from a relevant and trusted organization. The emails are carefully crafted by the attackers, targeted to specific groups and clicking the links installs malicious code on your computer. - Spear phishing: Spear phishing is a type of email attack that targets specific individuals or organizations. In Spear, a phishing attacker tricks a target into clicking a malicious link and installing malicious code, allowing the attacker to obtain sensitive information from the target's system or network.

91

You got the memory dump of a potentially compromised system, how are you going to approach its analysis?

Reference answer

I would approach analysis by first verifying the integrity of the dump. Then, I would use tools like Volatility to extract system information (e.g., running processes, network connections, loaded modules, and registry hives). I would look for suspicious processes, injected code, unknown drivers, and evidence of rootkits. I would also extract command-line history, open file handles, and memory strings to identify malicious artifacts, correlating them with known IOCs.

92

What is a public key?

Reference answer

A public key is a cryptographic key that is used to encrypt data that can only be decrypted with a corresponding private key.

93

What are the key elements of a strong security policy?

Reference answer

An effective security policy comprises the following features: access control encryption, regular updates, incident response, compliance, training and awareness.

94

What Is Identity Theft? Can You Prevent It?

Reference answer

Identity theft occurs when an attacker uses a target's private data to impersonate or steal from them. Methods of identity theft prevention include basic cybersecurity best practices like using robust, frequently updated passwords and adding authentication steps whenever possible. Installing antivirus software can prevent intruders from accessing your personal information via malware. Some of the most common methods of identity theft include hacking, phishing, and physical mail theft.

95

What is the SANS PICERL incident response model?

Reference answer

Preparation, Identification, Containement, Eradication, Recovery, Lessons learned

96

What are common ports involving security, what are the risks and mitigations?

Reference answer

Common security-related ports include: 22 (SSH) – risk of brute force attacks, mitigation: use key-based auth and fail2ban; 443 (HTTPS) – risk of SSL/TLS vulnerabilities, mitigation: keep protocols updated; 3389 (RDP) – risk of remote exploitation, mitigation: restrict access via VPN or firewall; 25 (SMTP) – risk of spam relay, mitigation: restrict relaying; 53 (DNS) – risk of amplification attacks, mitigation: rate limiting and DNSSEC.

97

You find hard-coded credentials in a repo. What immediate steps do you take?

Reference answer

Immediately, I would: 1) Rotate the exposed credentials (passwords, API keys, tokens) to invalidate them. 2) Remove the credentials from the repository history using tools like git filter-branch or BFG Repo-Cleaner. 3) Notify the security team and relevant stakeholders. 4) Conduct a forensic review of the repository access logs to determine if the credentials were accessed by unauthorized parties. 5) Implement a secret scanning tool (e.g., GitLeaks, TruffleHog) in the CI/CD pipeline to prevent future occurrences. 6) Educate the development team on secure credential management, such as using environment variables, secret management services (e.g., AWS Secrets Manager, HashiCorp Vault), or CI/CD secret variables.

98

How do you perform threat modeling?

Reference answer

To perform threat modeling, one would typically start by understanding the application and its architecture. Next, identify potential threats using techniques like STRIDE (Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, and Elevation of Privilege). Then, assess the risks associated with each threat and prioritize them based on their potential impact. Candidates should include steps such as identifying assets, understanding potential attackers' goals, and establishing appropriate security measures. A strong answer will reflect methodical thinking and comprehensive understanding of the process.

99

How do you ensure compliance with international data protection laws (like GDPR)?

Reference answer

To remain informed about the international regulations on data safety, the following steps should be taken. 1. Evaluate your data processes: Analyze how you manage data at least every week. 2. Introduce regulations: Create rules that coincide with the legal requirements. 3. Educate your staff: Ensure your workers understand their responsibilities. 4. Document everything: Record how data is utilized properly. 5. Continue monitoring: Carry out regular assessments to determine compliance with the regulations.

100

How do you report vulnerability findings to management?

Reference answer

I present vulnerabilities in business terms, highlighting risk to operations, compliance impact, and potential financial loss. Executive summaries are provided for leadership, while technical reports are shared with engineering teams for remediation.

101

Describe your experience with vulnerability assessments and penetration testing.

Reference answer

During my time as a Cyber Security Engineer, I have had extensive experience performing vulnerability assessments and penetration testing. In my previous position, I was responsible for leading a team to conduct a vulnerability assessment on a client's network infrastructure. In addition, I have experience with penetration testing. During our testing process, we mimicked a real-world attack to determine the effectiveness of the client's security measures. Through our testing, we were able to gain access to sensitive information, such as employee credentials and financial records. We provided recommendations for strengthening the client's security measures and implementing a plan for ongoing monitoring and maintenance. Overall, my experience with vulnerability assessments and penetration testing has allowed me to become proficient in identifying and mitigating potential security risks. I am confident in my ability to lead a team in the evaluation of network security and creating comprehensive documentation that highlights any vulnerabilities along with suggested remediation plans.

102

What do you mean by System Hardening?

Reference answer

In general, system hardening refers to a set of tools and procedures for managing vulnerabilities in an organization's systems, applications, firmware, and other components. The goal of system hardening is to lower security risks by lowering potential attacks and compressing the system's attack surface. The many types of system hardening are as follows: - Hardening of databases - Hardening of the operating system - Hardening of the application - Hardening the server - Hardening the network

103

What common vulnerabilities have you encountered, and how did you address them?

Reference answer

During my time as a Cyber Security Engineer, I have come across numerous vulnerabilities in various systems. One common vulnerability I often see is weak passwords among employees. This can lead to easy access to sensitive information and data breaches. To address this vulnerability, I implemented a password policy that required employees to create complex passwords that included numbers, special characters, and uppercase and lowercase letters. We also enforced password changes every three months to ensure security. After implementing this policy, we saw a significant decrease in unauthorized access attempts and improved security for our systems. Another vulnerability I have encountered is outdated software and operating systems. This can result in exploits and attacks from hackers seeking to exploit known vulnerabilities. To address this, I implemented a regular software and system update schedule. This ensured that we were always running the latest, most secure versions of software and systems. As a result, we saw a significant decrease in successful hack attempts and improved overall system performance.

104

What is threat intelligence as a service?

Reference answer

Threat intelligence as a service is a managed service that provides real-time threat intelligence feeds to help organizations improve their incident response and threat prevention capabilities.

105

What is an SQL injection? And how can you prevent it?

Reference answer

An SQL injection (SQLi) is an attack by injecting a code so that the hacker can manipulate any data that's being sent to the server to carry out malicious SQL statements and thereby control the web application's database server. In other words, the SQL injection allows the hacker or attacker to access, change, or even delete data on a server. Hackers use SQL injections to take over database servers. To prevent an SQL injection, you need to: - Use prepared statements - Use stored procedures - Validate user input

106

How would you encrypt sensitive data in a production database?

Reference answer

To encrypt sensitive data in a production database, I would use a combination of encryption at rest and encryption in transit. For encryption at rest, I would use database-level transparent data encryption (TDE) or column-level encryption using AES-256. For key management, I would use a dedicated key management service (KMS) to store and rotate encryption keys separately from the data. For encryption in transit, I would enforce TLS for all database connections. I would also implement access controls to ensure only authorized applications and users can access the decryption keys.

107

What do you understand by Risk, Vulnerability and threat in a network?

Reference answer

- Cyber threats are malicious acts aimed at stealing or corrupting data or destroying digital networks and systems. A threat can also be defined as the possibility of a successful cyberattack to gain unethical access to sensitive data on a system. - Vulnerabilities in cybersecurity are deficiencies in system designs, security procedures, internal controls, etc. that can be exploited by cybercriminals. In very rare cases, cyber vulnerabilities are the result of cyberattacks rather than network misconfigurations. - Cyber risk is the potential result of loss or damage to assets or data caused by cyber threats. You can't eliminate risk completely, but you can manage it to a level that meets your organization's risk tolerance. Therefore, our goal is not to build a system without risk but to keep the risk as low as possible.

108

What is the difference between a security policy and a security procedure?

Reference answer

A security policy is a high-level document that outlines an organization's security objectives and requirements, while a security procedure is a detailed step-by-step guide on how to implement a specific security policy.

109

Explain the concept of session hijacking.

Reference answer

Session hijacking is a security attack on user sessions over a protected network. The most common method of session hijacking is called IP spoofing, where an attacker uses source-routed IP packets to inject commands into the active communication between two nodes on a network, allowing an authenticated impersonation of one of the users. This type of attack is possible because authentication usually only happens at the beginning of a TCP session. The types of session hijacking are given below:

110

Slack?

Reference answer

Yes, similar tools can be written to scan Slack workspaces for secrets by using Slack's API to search messages, files, and channels for patterns like credentials or tokens. This would involve building a bot or script that monitors shared content and alerts administrators to potential leaks.

111

What is port blocking within LAN?

Reference answer

Port blocking in LAN means restricting users' access to several services within the local area network.

112

What is SQL injection and how can it be prevented?

Reference answer

SQL injection is an attack where malicious SQL statements are inserted into input fields. Prevention includes using parameterized queries, prepared statements, and input validation.

113

What is a spyware?

Reference answer

Spyware is a type of malware that monitors user activity and steals sensitive information without their knowledge or consent.

114

What are the common types of cyber security attacks?

Reference answer

The common types of cyber security attacks are:- - Malware - Cross-Site Scripting (XSS) - Denial-of-Service (DoS) - Domain Name System Attack - Man-in-the-Middle Attacks - SQL Injection Attack - Phishing - Session Hijacking - Brute Force

115

Differentiate between Stream Cipher and Block Cipher.

Reference answer

The major distinction between a block cypher and a stream cypher is that a block cypher turns plain text into ciphertext one block at a time. Stream cypher, on the other hand, converts plain text into ciphertext by taking one byte of plain text at a time. | Block Cipher | Stream Cipher | |---|---| | By converting plaintext into ciphertext one block at a time, Block Cipher converts plain text into ciphertext. | Stream Cipher takes one byte of plain text at a time and converts it to ciphertext. | | Either 64 bits or more than 64 bits are used in block ciphers. | 8 bits are used in stream ciphers. | | The ECB (Electronic Code Book) and CBC (Common Block Cipher) algorithm modes are utilized in block cipher (Cipher Block Chaining). | CFB (Cipher Feedback) and OFB (Output Feedback) are the two algorithm types utilized in stream cipher (Output Feedback). | | The Caesar cipher, polygram substitution cipher, and other transposition algorithms are used in the block cipher. | Stream cipher uses substitution techniques such as the rail-fence technique, columnar transposition technique, and others. | | When compared to stream cipher, a block cipher is slower. | When compared to a block cipher, a stream cipher is slower. |

116

What are some best practices for securing a network?

Reference answer

Here are some best practices for securing a network:

117

Tell me about a time you had to respond to a critical security incident in a cloud environment.

Reference answer

“Last year, our monitoring detected unusual data transfer activity from one of our AWS S3 buckets at 2 AM on a Saturday. As the on-call security engineer, I immediately activated our incident response plan. I first isolated the affected bucket by temporarily restricting access, then analyzed CloudTrail logs to understand the scope of the breach. I discovered that an employee's compromised credentials were being used to download customer data. I worked with our IT team to disable the account, rotated all potentially affected keys, and coordinated with our legal team on notification requirements. We contained the incident within 4 hours and found that only a small subset of data was accessed. This incident led me to implement additional monitoring for unusual data access patterns and advocate for mandatory MFA across all AWS accounts.”

118

Explain the honeypot and its types.

Reference answer

A honeypot is a networked system that acts as a trap for cyber attackers to detect and investigate hacker tactics and types of attacks. Acting as a potential target on the Internet, it notifies defenders of unauthorized access to information systems. Honeypots are classified based on their deployment and intruder involvement. Based on usage, honeypots are classified as follows: - Research honeypots: Used by researchers to analyze hacking attacks and find different ways to prevent them. - Production Honeypots: Production honeypots are deployed with servers on the production network. These honeypots act as a front-end trap for attackers composed of false information, giving administrators time to fix all vulnerabilities in real systems.

119

What is a cloud-based identity and access management (IAM)?

Reference answer

Cloud-based IAM is a solution that manages identities, access, and privileges in cloud environments to prevent unauthorized access and data breaches.

120

What is a firewall?

Reference answer

A firewall is a network security device or software that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between a trusted internal network and untrusted external networks (e.g., the internet), blocking or allowing traffic based on criteria like IP addresses, ports, protocols, or application data.

121

What is vulnerability management as a service?

Reference answer

Vulnerability management as a service is a managed service that identifies and prioritizes vulnerabilities, provides remediation guidance, and tracks progress.

122

What's the difference between hashing and encryption?

Reference answer

Hashing is the process of converting data into a different format that only an authorized person can access, whereas encryption involves coding the data where a person with an encryption key or a password can access the data. Hashing offers more data security than encryption.

123

What is the difference between virus and worm?

Reference answer

A virus is a piece of harmful executable code that is attached to another executable file and can modify or erase data. When a virus-infected computer application executes, it takes action such as removing a file from the computer system. Viruses can't be managed from afar. Worms are comparable to viruses in that they do not alter the program. It continues to multiply itself, causing the computer system to slow down. Worms can be manipulated with remote control. Worms' primary goal is to consume system resources.

124

What are the main transmission modes between devices in a computer network?

Reference answer

The three transmission modes are the Simplex Mode, the Half-Duplex Mode, and the Full-Duplex Mode. In the Simplex Mode, data can be sent in only one direction. That is, the message cannot be sent back to the sender. In a Half-Duplex Mode, the data can be transmitted in two directions using a signal carrier. However, the transmission cannot be done in both directions at the same time. In the Full-Duplex Mode, the data is bidirectional, that is, it can be sent in both directions at the same time.

125

What is Perfect Forward Secrecy?

Reference answer

Perfect Forward Secrecy (PFS) is a property of secure communication protocols where the compromise of a long-term private key does not compromise past session keys. In PFS, each session uses a unique, ephemeral key (derived via Diffie-Hellman key exchange) that is not derived from the long-term key. Thus, even if the server's private key is exposed, previous encrypted sessions remain secure.

126

What are the risks associated with public Wi-Fi?

Reference answer

- Malware, Viruses and Worms. - Rogue Networks. - Unencrypted Connections - Network Snooping. - Log-in Credential Vulnerability. - System Update Alerts. - Session Hijacking.

127

Difference between IPS and IDS?

Reference answer

An Intrusion Detection System (IDS) monitors network traffic and alerts on suspicious activity but does not take action to block it. An Intrusion Prevention System (IPS) monitors and also automatically blocks or prevents detected threats in real-time, often by dropping packets or resetting connections. IDS is passive, while IPS is active.

128

What is a cloud-based security orchestration, automation, and response (SOAR)?

Reference answer

A cloud-based SOAR is a security solution that automates and streamlines incident response processes to improve efficiency and effectiveness.

129

State the difference between a virus and worm.

Reference answer

- Worms: Worms are similar to viruses, but do not modify the program. It replicates more and more to slow down your computer system. The worm can be controlled with a remote control. The main purpose of worms is to eat up system resources. The 2000 WannaCry ransomware worm exploits the resource-sharing protocol Windows Server Message Block (SMBv1). - Virus: A virus is malicious executable code attached to another executable file that can be harmless or modify or delete data. When a computer program runs with a virus, it performs actions such as B. Delete the file from your computer system. Viruses cannot be controlled remotely. The ILOVEYOU virus spreads through email attachments.

130

What are some best practices for securing a system?

Reference answer

Some best practices for securing a system include:

131

What is the difference between active and passive cyber attacks?

Reference answer

- Active Cyber Attack: An active attack is a type of attack in which the attacker modifies or attempts to modify the content of the message. Active attacks are a threat to integrity and availability. Active attacks can constantly corrupt the system and modify system resources. Most importantly, if there is an active attack, the victim is notified of the attack. - Passive Cyber Attack: A passive attack is a type of attack in which the attacker observes the message content or copies the message content. Passive attacks are a threat to confidentiality. Since it is a passive attack, there is no damage to the system. Most importantly, when attacking passively, the victim is not notified of the attack.

132

What is the difference between XSS and CSRF?

Reference answer

XSS: Reflected XSS, Persistent XSS, DOM based /client-side XSS. CSRF: Cross-Site Request Forgery. Cookies.

133

Who are Black Hat, White Hat and Grey Hat Hackers?

Reference answer

Black Hat hackers, sometimes known as crackers, attempt to obtain unauthorized access to a system in order to disrupt its operations or steal critical data. Because of its malicious aim, black hat hacking is always illegal, including stealing company data, violating the privacy, causing system damage, and blocking network connection, among other things. Ethical hackers are also referred to as White hat hackers. As part of penetration testing and vulnerability assessments, they never intend to harm a system; rather, they strive to uncover holes in a computer or network system. Ethical hacking is not a crime and is one of the most difficult professions in the IT business. Many businesses hire ethical hackers to do penetration tests and vulnerability assessments. Grey hat hackers combine elements of both black and white hat hacking. They act without malice, but for the sake of amusement, they exploit a security flaw in a computer system or network without the permission or knowledge of the owner. Their goal is to draw the owners' attention to the flaw in the hope of receiving gratitude or a small reward.

134

Explain the ISO 27001/27002 standards.

Reference answer

Let's discuss the ISO 27001/27002 standards. ISO 27001: Addresses how to build , use, sustain , and enhance an Information Security Management System (ISMS). ISO 27002: Provides guidance on the approach companies can adopt to establish their own rules that ensure data is not compromised.

135

Write out a Cisco ASA firewall configuration on the white board to allow three networks unfiltered access, 12 networks limited access to different resources on different networks, and 8 networks to be blocked altogether.

Reference answer

A Cisco ASA configuration would involve defining access control lists (ACLs) and applying them to interfaces. For example: access-list UNFILTERED extended permit ip any any (for the three networks) applied to a specific interface; access-list LIMITED extended permit tcp 10.0.x.0 255.255.255.0 host 192.168.x.x eq 80 (for limited access); access-list BLOCKED extended deny ip any any (for the eight networks). These ACLs are then applied via access-group commands on relevant interfaces, with careful ordering of rules.

136

Explain Active Reconnaissance.

Reference answer

Active reconnaissance is a type of cyberattack used to gather intelligence about a system's vulnerabilities. To conduct this kind of reconnaissance, attackers must interact with the target via automated scanning or manual testing with tools like traceroute. While this can be a quick and accurate way to gather information, active reconnaissance is a high-risk, high-reward approach, as direct engagement with a target is more likely to be caught by a firewall or IDS.

137

How do you secure a server?

Reference answer

There are tons of ways to secure a server, such as: - Using SSL - Private networks and VPNs - Setting password and login expirations - Firewalls - Hiding server information. This cybersecurity interview question is asking which methods you prefer and why. Your answer may change based on the type of server you're securing.

138

What role does automation play in your cloud security practices?

Reference answer

Automation plays a crucial role in my cloud security practices by streamlining threat detection and response, reducing the risk of human error. I use tools like AWS Lambda and Azure Automation to automate routine security tasks, ensuring consistent and efficient protection.

139

What are three ways to safeguard against cyber-attacks?

Reference answer

There are many ways to prevent cyber-attacks, including: i) Regular software updates are essential to keep this kind of problem under control because they keep the system and applications in use up-to-date. ii) Employee training and awareness is another method that can be used to prevent these attacks; it involves more just telling workers what these dangers might look like but also teaching them about good online safety practices. iii) Secondly, using multi-factor authentication would make user accounts more secure.

140

How do web certificates for HTTPS work?

Reference answer

Web certificates (SSL/TLS certificates) work by binding a domain name to a public key, signed by a trusted Certificate Authority (CA). When a browser connects to an HTTPS website, the server presents its certificate. The browser verifies the certificate's validity (signature, expiration, and chain of trust) and then uses the public key to establish a secure session key for encrypted communication.

141

What is a security awareness training as a service?

Reference answer

Security awareness training as a service is a managed service that provides regular security awareness training to employees to improve their security knowledge and behaviours.

142

What is Cross-Site Request Forgery?

Reference answer

Cross-site request forgery is a web security vulnerability that allows an attacker to induce users to perform actions that they do not intend to perform. It allows an attacker to partly circumvent the same origin policy, which is designed to prevent different websites from interfering with each other.

143

How do you ensure data integrity and confidentiality?

Reference answer

As a Cyber Security Engineer, ensuring data integrity and confidentiality is top priority. To guarantee integrity, I use cryptographic algorithms such as SHA-2 and SHA-3 to generate hashes for data validation. In addition, I make use of digital signatures for non-repudiation purposes. When it comes to data confidentiality, I use encryption techniques. I implement symmetric encryption methods such as AES and Twofish for secure communication over insecure channels. Furthermore, I utilize asymmetric encryption methods such as RSA and Elliptic Curve Cryptography (ECC) for secure key exchange and message authentication. One example of my successful implementation of data integrity and confidentiality was in my previous job as a Security Engineer at XYZ Corp. I performed a security audit and found that the company's financial data was being transmitted over an unsecured network. I immediately implemented AES encryption and SHA-2 hashing to ensure data confidentiality and integrity. As a result, the company received an A+ rating in their next security audit.

144

What is a cloud security posture management (CSPM)?

Reference answer

A CSPM is a security solution that provides visibility and control over cloud security posture to identify and remediate security risks.

145

What is a cloud-based cloud infrastructure entitlement management (CIEM)?

Reference answer

Cloud-based CIEM is a solution that provides visibility and control over cloud infrastructure entitlements to prevent privilege escalation and reduce the attack surface.

146

How do you stay updated on the latest cybersecurity threats and trends?

Reference answer

"I regularly follow cybersecurity blogs like Krebs on Security and participate in webinars hosted by organizations like (ISC)². I'm also a member of the ISACA community, which helps me exchange insights with peers. I recently implemented a phishing simulation training program based on the latest threat intelligence, which improved our staff's awareness significantly. Continuous learning is crucial for staying ahead of emerging threats."

147

What is the CIA Triad and how does it apply in real systems?

Reference answer

Focus: Foundational security thinking Core Idea: Security is about tradeoffs, not absolutes Strong Answers Cover: • Risk-based prioritization between availability vs confidentiality • Business impact of breaches vs downtime • Why availability failures often matter more than data loss • Long-term trust implications

148

What is a security operations centre (SOC)?

Reference answer

A SOC is a centralized unit that monitors and responds to security incidents in real time.

149

What Is the Difference Between Black Box Testing and White Box Testing?

Reference answer

Black box testing evaluates the behavior and functionality of a software product. This testing methodology operates from an end-user perspective and requires no software engineering knowledge. Black box testers do not have information about the internal structure or design of the product. Conversely, white box testing is typically performed by developers to assess the quality of a product's code. The tester must understand the internal operations of the product.

150

What are the steps involved in hacking a server or network?

Reference answer

The following steps must be ensured in order to hack any server or network: - Access your web server. - Use anonymous FTP to access this network to gather more information and scan ports. - Pay attention to file sizes, open ports and processes running on your system. - Run a few simple commands on your web server like "clear cache" or "delete all files" to highlight the data stored by the server behind these programs. This helps in obtaining more sensitive information that can be used in application-specific exploits. - Connect to other sites on the same network, such as Facebook and Twitter, so that you can check the deleted data. Access the server using the conversion channel. - Access internal network resources and data to gather more information. - Use Metasploit to gain remote access to these resources.

151

What is cloud-based security information and event management (SIEM)?

Reference answer

A cloud-based SIEM is a security solution that collects, monitors, and analyzes log data from cloud and on-premises sources to provide real-time insights into security threats.

152

What is a hybrid cloud?

Reference answer

A hybrid cloud is a cloud computing environment that combines on-premises infrastructure with public cloud services.

153

What is cloud infrastructure entitlement management (CIEM)?

Reference answer

A CIEM is a security solution that provides visibility and control over cloud infrastructure entitlements to prevent privilege escalation and reduce the attack surface.

154

How would you set up a firewall?

Reference answer

These are the steps I would follow to set up a firewall: 1. For the username and password: We'll need to change the default password for a firewall device. 2. For remote administration: We'll need to disable this feature. 3. For port forwarding: We'll have to configure the correct port forwarding to ensure that applications, like a web server or an FTP server, work properly. 4. We'll need to ensure that the network's DHCP server is disabled before installing the firewall. Otherwise, it will cause a conflict. 5. We'll need to make sure that logging is enabled so that we can troubleshoot any firewall issues or possible attacks. 6. In terms of policies, we should have clear security policies. The firewall should enforce those policies.

155

Define VPN.

Reference answer

The term VPN refers to a virtual private network. It enables you to connect your computer to a private network, establishing an encrypted connection that hides your IP address, allowing you to safely share data and access the web while safeguarding your online identity. A virtual private network, or VPN, is an encrypted link between a device and a network via the Internet. The encrypted connection aids in the secure transmission of sensitive data. It protects against illegal eavesdropping on the traffic and allows the user to work remotely. In corporate settings, VPN technology is commonly used.

156

What does a white-hat, black-hat, and grey-hat hacker mean?

Reference answer

A white-hat hacker, known as an ethical hacker, is a person who uses their hacking skills to find vulnerabilities in companies' networks. White-hat hackers are usually employed by the company under a non-disclosure agreement (NDA) to hack their systems and servers so that the company can then reinforce its firewalls and cybersecurity protocols. A black-hat hacker or a malicious hacker is a cybercriminal. Black-hat hackers attack companies' and organizations' networks to uncover private information whether for personal or political gain or for fun. A grey-hat hacker is someone who is in-between the other two. They might hack into systems and networks and violate laws but they usually don't have the malicious intentions of black-hat hackers.

157

What are the differences between an IDS and an IPS?

Reference answer

Key differences between Intrusion Detection System (IDS) and Intrusion Prevention System (IPS): | IDS | IPS | | Passive monitoring system Monitors and detects potential security incidents or attacks | Active security control system Monitors, detects, and actively blocks or prevents security incidents | | Does not take direct action to prevent or stop attacks | Takes automated actions to block or mitigate attacks in real time |

158

What is a Firewall?

Reference answer

A firewall serves as a barrier between a LAN and the Internet. It allows private resources to remain private while reducing security threats. It manages both inbound and outbound network traffic. A sample firewall between a LAN and the internet is shown in the diagram below. The point of vulnerability is the connection between the two. At this point, network traffic can be filtered using both hardware and software. There are two types of firewall systems: one that uses network layer filters and the other that uses user, application, or network layer proxy servers.

159

What's the best way to answer behavioral questions if I'm new to security engineering?

Reference answer

Use related experiences—IT, helpdesk, or academic projects. Focus on how you communicate, resolve challenges, and learn quickly. STAR method helps here, too.

160

What happens when you type a URL into a browser?

Reference answer

This question tests your understanding of how data moves between systems, including DNS resolution, TCP handshake, and TLS encryption. You should explain the full flow from URL entry to page rendering, covering DNS lookup, TCP connection establishment, TLS handshake for HTTPS, HTTP request/response, and browser rendering.

161

How do threat detection systems work?

Reference answer

These systems monitor the activities on the network, including the system logs, and use the rules and smart computer programs to discover their potential threats and abnormal behavior.

162

Describe a situation where you had to convince stakeholders to invest in a cloud security initiative.

Reference answer

“Our engineering team wanted to move faster with deployments, but I noticed they were bypassing our security review process for ‘low-risk' changes. When I analyzed our deployment patterns, I found that 30% of deployments had security misconfigurations that we caught in production. I put together a proposal for integrating security scanning into the CI/CD pipeline, which required a $50,000 investment in tooling and training. I presented the business case to leadership, showing how the current process was costing us developer time and creating risk exposure. I demonstrated the ROI by calculating the cost of potential security incidents versus the investment in automation. The stakeholders approved the initiative, and within six months, we reduced security findings in production by 80% while actually speeding up deployment times.”

163

Can you list examples of controls these frameworks require?

Reference answer

Examples of controls include: access control policies (e.g., least privilege), encryption for data at rest and in transit, intrusion detection and prevention, incident response plans, regular security awareness training, vendor management, physical security measures, logging and monitoring, backup and recovery procedures, and change management processes.

164

How do you prioritize security vulnerabilities when you have limited resources?

Reference answer

I use a risk-based prioritization framework that considers exploitability, business impact, and available compensating controls. I start with CVSS scores but adjust based on our specific environment—a critical vulnerability in an internet-facing system gets higher priority than the same vulnerability on an isolated internal server. I maintain an asset inventory with business criticality ratings so I can quickly assess impact. I also factor in available patches and deployment complexity. For example, when we discovered multiple vulnerabilities during a particularly busy quarter, I prioritized patching our customer-facing web servers first because of their exposure and business impact, while temporarily increasing monitoring on internal systems until we could schedule maintenance windows.

165

How do you balance security requirements with business needs?

Reference answer

I approach this by first understanding the business objective behind each request, then working collaboratively to find secure solutions that enable the business goal. I use risk-based decision making, where I present the potential impact and likelihood of security issues alongside proposed mitigation options. For example, when our sales team needed to access customer data from personal devices during the pandemic, instead of blocking the request, I worked with them to implement a secure VDI solution with conditional access policies. This met their business need while maintaining our security standards. I find that explaining security in business terms—potential downtime, regulatory fines, reputation damage—helps stakeholders understand why certain controls are necessary.

166

Design a secure IAM system for internal employees and external partners.

Reference answer

For internal employees, I would use a corporate identity provider (e.g., Active Directory, Okta) with federation to the cloud. Employees would authenticate via SSO with MFA and be assigned roles based on their department and seniority (RBAC). For external partners, I would use a separate identity source or a federated identity system using SAML 2.0 or OIDC. Partners would have limited, time-bound roles with scoped permissions. I would implement just-in-time (JIT) access for temporary needs, use attribute-based access control (ABAC) for fine-grained permissions, and enforce centralized audit logging for all access events. All IAM changes would be version-controlled and deployed via CI/CD pipelines.

167

What is traceroute? Explain it in details.

Reference answer

Traceroute is a network diagnostic tool that displays the route and transit delays of packets across an IP network. It works by sending packets with increasing TTL values. The first packet with TTL=1 is dropped by the first router, which sends back an ICMP Time Exceeded message, revealing the router's IP. The process repeats with TTL=2, 3, etc., until the destination is reached, showing each hop and the round-trip time.

168

What are the differences between symmetric and asymmetric encryption? And which is better?

Reference answer

Symmetric encryption is a type of encryption that uses a single key, a secret key, to both encrypt and decrypt electronic information. Entities communicating via symmetric encryption must exchange the key so they can be used in the decryption process. On the other hand, Asymmetric encryption uses two keys, one public and one private, to encrypt and decrypt messages. While the symmetric encryption is faster, the key needs to be transferred using an unencrypted channel, the asymmetric encryption is slower but more secure. Each has its pros and cons, which means a better approach is to combine the two types of encryption. This means we'll need to set up a channel with asymmetric encryption and send the data using a symmetric process.

169

What are the core functions of IAM?

Reference answer

The core functions of IAM include: Identification (verifying identity of users, devices, or services), Authentication (confirming the identity is genuine via password, biometrics, or MFA), Authorization (granting or denying access based on permissions and roles), and Accountability (logging and auditing access to maintain a record of who did what and when).

170

What is a keylogger?

Reference answer

A keylogger is a type of malware that records user keystrokes to steal sensitive information such as passwords and credit card numbers.

171

What are the common techniques for securing a computer network?

Reference answer

To shield your network, you can: erect firewalls, pay attention to the software which has not had updates made on it, deal with all sorts of security vulnerabilities, be aware of threats, carry out security checks, switch on attack detection/prevention technologies, as well as use tough passwords alongside other forms of login including two-factor and multi-factor authentication.

172

How Does a Firewall Device Contribute to Network Security?

Reference answer

A firewall acts as a barrier between internal and external networks, inspecting traffic and blocking unauthorized access or malicious activities. Firewalls can prevent unauthorized access, protect against malware, and enforce security policies to safeguard the network and the connected systems.

173

Tell me about a time you responded to a phishing attack.

Reference answer

"At a previous company, we experienced a phishing attack that compromised several employee accounts. I quickly activated our incident response plan, notifying affected individuals and securing compromised accounts. I coordinated with IT to conduct a thorough investigation while keeping communication lines open with senior management. Following the incident, we implemented enhanced training for employees and updated our security protocols, resulting in a 60% reduction in phishing incidents over the next year."

174

How does HMAC work?

Reference answer

HMAC (Hash-based Message Authentication Code) works by applying a cryptographic hash function (e.g., SHA-256) to a combination of a secret key and the message. The process involves two passes: first, the key is XORed with an inner pad and hashed with the message; then, the key is XORed with an outer pad and hashed with the result of the first hash. This produces a fixed-size MAC that verifies both the integrity and authenticity of the message.

175

Tell me about a project where you improved cloud security processes or procedures.

Reference answer

“I noticed that our cloud security assessments were taking weeks to complete and creating bottlenecks for new projects. The process was mostly manual, involving lengthy spreadsheets and email chains. I proposed automating our security assessments using a combination of AWS Config rules and custom scripts that could evaluate common security controls automatically. I worked with stakeholders to define clear security criteria and built a dashboard that showed real-time compliance status. The new process reduced assessment time from 3 weeks to 3 days for standard deployments, while actually improving our security posture through consistent, repeatable checks. The development teams loved the faster feedback, and our security coverage became more comprehensive.”

176

What are biggest AWS security vulnerabilities?

Reference answer

Common AWS security vulnerabilities include: misconfigured S3 buckets leading to data exposure, overly permissive IAM roles and policies, inadequate network segmentation (e.g., open security groups), lack of encryption at rest or in transit, weak key management, and unpatched EC2 instances. These often stem from human error or lack of proper configuration management.

177

Can you explain the difference between symmetric and asymmetric encryption?

Reference answer

Encryption is a critical component of secure communication and data protection. There are two main types of encryption: symmetric encryption and asymmetric encryption. Symmetric encryption uses a single key, known as the secret key, to both encrypt and decrypt data. The sender and receiver must have the same key to securely exchange information. While symmetric encryption is generally faster and more efficient, its main drawback is the challenge of securely sharing the secret key between parties. On the other hand, asymmetric encryption, also known as public key cryptography, uses a pair of keys: a public key and a private key. The public key is used to encrypt data, while the private key is used to decrypt it. The public key can be freely shared, while the private key must be kept secret by its owner. Asymmetric encryption provides better security for key exchange but is generally slower and less efficient than symmetric encryption. In summary, symmetric encryption is faster and more efficient but requires secure key exchange, while asymmetric encryption provides a more secure method for key exchange but is slower and less efficient.

178

What are your strategies for managing supply chain risks in cybersecurity?

Reference answer

Here is how to manage supply chain risks in cybersecurity: i) Should check out and inspect how secure they were regularly ii) Stipulate safety regulations in agreements iii) Monitor supplier's activities and their safety measures all the time iv) If they occur, have contingencies against supply chain issues.

179

How do you protect sensitive data in a database?

Reference answer

Sensitive data can be protected using encryption at rest and in transit, access controls, tokenization, and regular security audits.

180

What form of cookie might be used in a spyware attack?

Reference answer

A tracking cookie, instead of a session cookie, would be used in a spyware attack because it would last through multiple sessions rather than just one.

181

What are the common types of malware, and how can they be prevented?

Reference answer

Common types of malware include viruses, ransomware, Trojans, worms, spyware, and adware. To avoid these types of malware, we should implement some preventive measures, including:

182

Differentiate between Vulnerability Assessment and Penetration Testing.

Reference answer

Vulnerability assessment and penetration testing are two different phrases that both serve the same purpose: to secure the network environment. Vulnerability Assessment is a process for defining, detecting, and prioritizing vulnerabilities in computer systems, network infrastructure, applications, and other systems, as well as providing the necessary information to the organization to correct the flaws. Penetration Testing is also known as ethical hacking or pen-testing. It's a method of identifying vulnerabilities in a network, system, application, or other systems in order to prevent attackers from exploiting them. It is most commonly used to supplement a web application firewall in the context of web application security (WAF). A vulnerability scan is similar to approaching a door and checking to see if it is unlocked before stopping. A penetration test goes a step further, not only checking to see if the door is unlocked but also opening the door and walking right in.

183

How can you avoid a brute force attack?

Reference answer

There are a variety of techniques for stopping or preventing brute force attacks. A robust password policy is the most evident. Strong passwords should be enforced by every web application or public server. Standard user accounts, for example, must contain at least eight characters, a number, uppercase and lowercase letters, and a special character. Furthermore, servers should mandate password updates on a regular basis. Brute Force attack can also be avoided by the following methods:- - Limit the number of failed login attempts. - By altering the sshd_config file, you can make the root user unreachable via SSH. - Instead of using the default port, change it in your sshd config file. - Make use of Captcha. - Limit logins to a certain IP address or range of IP addresses. - Authentication using two factors - URLs for logging in that are unique - Keep an eye on the server logs.

184

What are the latest developments in cybersecurity threats?

Reference answer

Cyber security is in a fix: Ransomware is evolving to become more sophisticated as hackers practice selectiveness and brilliance while choosing their targets; hacking into software updates or even other services among victims' organizations is widespread; however -60% remain unprotected due its complexity-; since now malevolent agents have resorted to using AI to make their bogus mails seem more logical as well as vicious codes efficient; no one knew about the faults that could be exploited up to this day.

185

What is a VPN and how does it secure communication?

Reference answer

A VPN (Virtual Private Network) creates an encrypted tunnel between a device and a remote server, securing data transmission over public networks by preventing eavesdropping and tampering.

186

How do you assess and manage third-party vendor security risks?

Reference answer

I start vendor risk assessment during the procurement process with a comprehensive security questionnaire covering their incident response procedures, data handling practices, and compliance certifications. I request recent penetration test results and SOC 2 reports when available. For critical vendors, I conduct on-site security reviews and require them to notify us of any security incidents within 24 hours. I maintain a vendor risk register that tracks each vendor's risk level and renewal dates for security assessments. At my current company, this process helped us identify that one of our payment processors had insufficient encryption for data in transit, which we required them to remediate before contract renewal.

187

Explain the differences between risk, vulnerability, and a threat.

Reference answer

Vulnerability is a weakness or gap in a company's security efforts, while a threat is a hacker who has noticed this weakness and exploits it. A risk, on the other hand, is a measure of how much the vulnerability has been exploited.

188

What kind of problems or anomalies would you look for in an already compromised system?

Reference answer

Demonstrates candidates' analytical and critical-thinking skills.

189

What is a vulnerability scan?

Reference answer

A vulnerability scan is an automated process that identifies potential vulnerabilities in a system or network.

190

What steps do you take after discovering a zero-day vulnerability?

Reference answer

I first check for vendor advisories and apply recommended mitigations. If no patch is available, I implement compensating controls such as network isolation, strict access controls, or disabling vulnerable features until a fix is released.

191

How can identity theft be prevented?

Reference answer

Steps to prevent identity theft: - Use a strong password and don't share her PIN with anyone on or off the phone. - Use two-factor notifications for email. Protect all your devices with one password. - Do not install software from the Internet. Do not post confidential information on social media. - When entering a password with a payment gateway, check its authenticity. - Limit the personal data you run. Get in the habit of changing your PIN and password regularly. - Do not give out your information over the phone.

192

How would you improve security for a Kubernetes cluster?

Reference answer

To improve security for a Kubernetes cluster, I would: 1) Enable RBAC and enforce least privilege for all service accounts and users. 2) Implement network policies to segment traffic between pods and namespaces. 3) Use Pod Security Standards to restrict privileged containers and enforce read-only root filesystems. 4) Scan images for vulnerabilities in the CI/CD pipeline and enforce image signing. 5) Enable audit logging and send to a SIEM. 6) Use admission controllers (e.g., OPA Gatekeeper) to enforce policies on resource creation. 7) Regularly update the cluster and worker nodes to patch vulnerabilities. 8) Implement runtime security monitoring (e.g., Falco). 9) Secure the etcd datastore with encryption and access controls. 10) Use external secrets management instead of storing secrets in ConfigMaps or Secrets.

193

Build a secrets management system for a microservices architecture.

Reference answer

I would design a secrets management system using HashiCorp Vault or AWS Secrets Manager. Scope: Microservices architecture, thousands of secrets, dynamic rotation. Assets: Database credentials, API keys, TLS certificates, service account tokens. Threats: Secret leakage, unauthorized access, credential theft. Layers: Identity layer using service-to-service authentication with mTLS and short-lived tokens. Access control with fine-grained policies (RBAC/ABAC). Data layer with encryption at rest and in transit using a dedicated key hierarchy. Dynamic secrets with automatic rotation and lease-based expiration. Monitoring with audit logging of all secret access and alerts on anomalous retrieval patterns. Tradeoffs: Centralized secret store introduces a single point of failure; we would deploy in a highly available, multi-region setup. Performance overhead of secret retrieval is mitigated by local caching with TTL.

194

What do you mean by Man-in-the-Middle Attack?

Reference answer

A cyber threat (a type of eavesdropping assault) in which a cybercriminal wiretaps a communication or data transmission between two people is known as a man-in-the-middle attack. Once a cybercriminal enters a two-way conversation, they appear to be genuine participants, allowing them to obtain sensitive information and respond in a variety of ways. The main goal of this type of attack is to acquire access to our company's or customers' personal information. On an unprotected Wi-Fi network, for example, a cybercriminal may intercept data passing between the target device and the network.

195

What is a distributed denial of service (DDoS) attack?

Reference answer

A DDoS attack is a type of attack that uses multiple compromised systems to flood a system or network with traffic.

196

Differentiate between VPN and VLAN.

Reference answer

Companies use VLANs to consolidate devices that are dispersed across several remote sites into a single broadcast domain. VPNs, on the other hand, are used to transmit secure data between two offices of the same organization or between offices of different companies. Individuals also use it for their personal needs. A VLAN is a VPN subtype. VPN stands for Virtual Private Network, and it is a technology that creates a virtual tunnel for secure data transfer over the Internet. Because it enables encryption and anonymization, a VPN is a more advanced but more expensive solution. A VLAN is useful for segmenting a network into logical sections for easier management, but it lacks the security characteristics of a VPN. A virtual local area network minimizes the number of routers required as well as the cost of deploying routers. A VPN improves a network's overall efficiency. Example of a VPN:- NordVPN, ZenMate

197

Describe a time when you had to collaborate with other teams or departments to implement security measures in a system. – Situation: need for collaboration to implement security measures – Task: responsibility to collaborate with other teams/departments – Action: steps taken to collaborate and implement the security measures – Result: outcome of successful collaboration and implementation of the security measures.

Reference answer

Situation: We needed to deploy a network segmentation solution across the organization. Task: I was responsible for collaborating with network, IT, and development teams. Action: I held cross-functional meetings to define requirements, coordinated with network engineers to configure VLANs and firewalls, and worked with developers to test application compatibility. Result: The segmentation was successfully implemented, reducing the attack surface and improving incident containment.

198

Describe a time when you had to quickly adapt to a new security threat or vulnerability. How did you go about responding to the situation?

Reference answer

One day, during my stint as a cybersecurity engineer at XYZ Corp, I discovered a potential zero-day vulnerability in one of our critical applications. This vulnerability, if exploited, could have given attackers access to sensitive customer data. Upon discovering it, I immediately informed my team and the management and then initiated our pre-established incident response plan. We prioritized securing the vulnerable system to minimize the potential damage. While my team focused on developing a patch for the vulnerability, I coordinated with other departments to make sure all other systems were being checked for similar issues. I also kept the management updated on the progress and any potential risks associated with the vulnerability. At the same time, I contacted the software vendor to report the vulnerability, share our findings, and request additional support to ensure the security of our systems. Fortunately, the vendor was highly responsive, and we were able to collaborate and develop a fix together in a timely manner. We thoroughly tested the patch and then deployed it across all instances of the application. Once the situation was resolved, our team conducted a post-mortem analysis to learn from the experience and identify any areas for improvement in our incident response plan and security practices. As a result, we updated our vulnerability management process and enhanced our threat intelligence program to better detect and prevent similar issues in the future.

199

What are some common challenges in threat modeling, and how do you address them?

Reference answer

Common challenges include incomplete information about the system, evolving threat landscapes, and balancing security with usability. To tackle these, I stay informed about the latest security trends and work closely with development teams to integrate security early in the design process. Strong candidates will highlight their problem-solving skills and adaptability in overcoming such challenges. Their response should reflect proactive measures and continuous learning.

200

What is Vulnerability Assessment (VA) and how is it different from Penetration Testing (PT)?

Reference answer

Vulnerability Assessment is the process of locating flaws or vulnerabilities on the target. For example, a company may be aware that its security system has flaws or weaknesses. To find those flaws, prioritize them, and fix them, they would need to conduct a Vulnerability Assessment. On the other hand, Penetration Testing (PT) is the process of finding vulnerabilities on the target. In this situation, the company would have set up all possible security measures they could think of and test other ways their system or network may be hacked.

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