Mock Interview Questions: Info Security Analyst

1

What are the three primary goals of security?

Reference answer

The three primary goals of security are confidentiality, integrity, and availability (CIA).

2

What do you mean by System Hardening?

Reference answer

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

3

What is the importance of Data Loss Prevention (DLP)?

Reference answer

DLP focuses on ensuring the security of sensitive data by preventing unauthorized access and transmission. By carefully monitoring, detecting, and preventing data leakage, DLP effectively mitigates the potential for data breaches. This invaluable tool ensures that organizations can uphold data integrity, maintain confidentiality, and quickly meet regulatory requirements.

4

What kind of cookie would a spyware attack typically use?

Reference answer

A spyware attack would typically use a tracking cookie rather than a session cookie, which would persist across different sessions rather than stopping at one session.

5

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

Reference answer

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

6

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.

7

What is a vulnerability assessment?

Reference answer

A vulnerability assessment is a systematic process of identifying and evaluating potential vulnerabilities in a system or network.

8

What information should be included in an incident report?

Reference answer

Comprehensive details including incident timeline, affected systems/data, attack vectors, indicators of compromise, and actions taken. Business impact assessment covering financial losses, operational disruption, compliance implications, and reputational damage. Root cause analysis, lessons learned, and specific recommendations to prevent recurrence with assigned ownership and deadlines.

9

Differentiate EDR and XDR

Reference answer

| EDR (Endpoint Detection and Response) | XDR (Extended Detection and Response) | |---|---| | EDR is a security solution focused on monitoring and responding to threats on endpoint devices like laptops, desktops and servers. | XDR is an advanced security solution that integrates data from multiple sources like endpoints, networks, servers and applications. | | It detects and investigates suspicious activity at the device level. | It provides a centralized view of threats across the entire security environment. | | It offers real-time threat detection and response for endpoints only. | It correlates security data from multiple layers for better detection accuracy. | | It is limited to endpoint protection. | It provides broader organization-wide threat detection and response. |

10

What are the differences between HIDS and NIDS?

Reference answer

A Host IDS (HIDS) and a Network IDS (NIDS) are Intrusion Detection Systems. However, the HIDS can only be set up on a particular device or host, where it will monitor the traffic of this device or host and any suspicious activities. On the other hand, the NIDS is set up on a network where it monitors all the traffic and suspicious activities of all devices connected to the entire network.

11

What is a Traceroute?

Reference answer

I've used Traceroute to monitor and assess where connections break in company packet path systems. Traceroute helps me identify areas of failure in packet pass-throughs.

12

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.

13

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.

14

What is the difference between an IDS and an IPS?

Reference answer

IDS only detects the traffic but IPS can prevent/block the traffic.

15

How would you set up a firewall?

Reference answer

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

16

How would you detect lateral movement in a network?

Reference answer

I'd monitor for several indicators: unusual authentication patterns like admin accounts logging into systems they don't normally access, unexpected internal network connections between systems, and tools like PSExec or WMI being used for remote execution. I'd also look for credential dumping activities and compare current network traffic patterns against baselines. In my experience, attackers often leave breadcrumbs across multiple log sources, so correlation is key.

17

What Is multi-factor authentication, and how does it enhance security?

Reference answer

You have to present yourself as who you are by at least two different methods before accessing your account using multifactor authentication which boosts security by increasing the difficulty level for hackers who might have accessed only your password.

18

What is the Three-way handshake?

Reference answer

TCP uses a three-way handshake to establish reliable connections. The connection is full-duplex, with synchronization (SYN) and acknowledgment (ACK) on both sides. The exchange of these four flags is done in three steps: SYN, SYN to ACK and ACK.

19

What Do You Mean by a VPN?

Reference answer

A virtual private network (VPN) establishes a protected network connection when using a public network. A VPN can encrypt internet traffic in real-time, thereby securing data that travels across the network and preventing third parties from tracking user activity. VPNs redirect a user's IP address through a remote host server, allowing for IP address concealment.

20

What is Social Engineering?

Reference answer

Manipulation technique exploiting human psychology to trick individuals into divulging confidential information or performing actions. Knowledge of common techniques including pretexting, baiting, tailgating, phishing, vishing, and impersonation attacks. Understanding that technical controls alone are insufficient and awareness training is critical defense against social engineering.

21

What is the difference between black hat, white hat, and grey hat hackers?

Reference answer

Black hat hackers are those who hack without authority. White hat hackers are authorized to perform a hacking attempt under a signed NDA. Grey hat hackers are white hat hackers who sometimes perform unauthorized activities.

22

What is a CASB (Cloud Access Security Broker)?

Reference answer

Security policy enforcement point between cloud service consumers and providers offering visibility and control over cloud usage. Understanding of four pillars: Visibility (shadow IT discovery), Compliance (data governance), Threat Protection, and Data Security. Knowledge of deployment modes (inline proxy vs. API-based) and use cases including DLP, malware detection, and access control.

23

Describe a zero-day attack.

Reference answer

A zero-day attack is a form of cyber attack that exploits a previously undiscovered software vulnerability. The term “zero-day” describes a situation in which developers or software vendors have zero days to fix the problem because it is exploited before they become aware of it.

24

What is a Security Operations Center (SOC)?

Reference answer

Centralized unit that monitors, detects, analyzes, and responds to cybersecurity incidents using people, processes, and technology. Understanding of SOC responsibilities including continuous monitoring, threat hunting, incident response, and vulnerability management. Knowledge of SOC team structure, different analyst tiers, and metrics used to measure SOC effectiveness.

25

What is a virus?

Reference answer

A virus is a type of malware that attaches itself to a program or file to replicate itself and spread to other systems.

26

What do you mean by System Hardening?

Reference answer

System hardening is the process of securing a system by reducing its attack surface. The attack surface includes all possible vulnerabilities, such as default passwords, unnecessary services and misconfigured settings, that attackers can exploit. By minimizing these weaknesses, system hardening makes the system more secure and resistant to attacks. - It involves applying security patches and regular system updates. - It includes disabling unused ports, applications and services. - It enforces strong authentication methods and access controls.

27

What is Insecure Direct Object Reference (IDOR)?

Reference answer

Insecure Direct Object Reference (IDOR), is a vulnerability caused by the lack of an authorization mechanism or because it is not used properly. It enables a person to access an object that belongs to another. Among the highest web application vulnerability security risks published in the 2021 OWASP, IDOR or "Broken Access Control" takes first place.

28

How do you envision your first 90 days on the job?

Reference answer

Your answer should encompass how you intend to meet with your team members to find out more about them and how you can work together. You should talk about how you will prioritize gaining an understanding of what your managers need from you and what all the stakeholders hope to achieve while also building strong rapport with your co-workers. You should ask what you can do to make an impact right away. Talk about how you intend to learn and get into the midst of business as soon as you can.

29

Describe how you would set up monitoring and alerting for a network you inherited with minimal documentation.

Reference answer

“I'd start by taking inventory. I'd run network scans to see what's actually connected, interview team members to understand critical systems, and review any existing monitoring to understand gaps. Let's say I find a database server, web servers, and domain controllers. For the domain controllers, I'd prioritize authentication logs—failed login attempts, privilege escalation, unusual activity. For the database, I'd monitor access logs, queries to sensitive tables, and performance anomalies that might indicate an attack. For network monitoring, I'd use NetFlow to establish baselines—what's normal traffic look like?—then alert on deviations. I'd keep alerting simple initially to avoid overwhelming the team with false positives. I'd document what I'm monitoring and why, and regularly review alerts to tune thresholds. As I understand the environment better, I'd add more sophisticated detection.”

30

What is the difference between asymmetric and symmetric encryption?

Reference answer

Symmetric Key Encryption: the same key is used to encrypt and decrypt the messages. This makes it easy to use but less secure. It also requires a safe method to transfer the key from one party to another. Asymmetric Key Encryption: uses different keys for the encryption and decryption processes. One party can encrypt messages using a known "public" key but only those with the "private" key can decrypt them. It is more secure than the symmetric key encryption technique but is much slower. [GeeksforGeeks]

31

What is a SIEM?

Reference answer

Security Information and Event Management (SIEM), is a security solution that provides the real time logging of events in an environment. The actual purpose for event logging is to detect security threats. In general, SIEM products have a number of features. The ones that interest us most as SOC analysts are: they filter the data that they collect and create alerts for any suspicious events. (LetsDefend)

32

What Is the Purpose of a Virtual Private Network (VPN), and What Makes It Essential?

Reference answer

This cybersecurity interview question evaluates your knowledge of network security tools that protect data privacy. Comprehending VPNs is crucial for securing remote connections and protecting data transmitted over public networks. Example: A Virtual Private Network (VPN) is a security technology that establishes a secure and encrypted connection over an inherently less secure network, such as the internet. VPNs are used to shield user identities and data from eavesdropping, interference, and censorship. In practice, I implement VPNs to enable secure remote access to corporate networks, ensuring that all transmitted data remains confidential and secure from unauthorized access.

33

What do you mean by a Null Session?

Reference answer

A null session is an unauthenticated connection to a Windows system that allows access to certain network resources without a username or password. It was commonly used in older Windows systems to share information but could be exploited to gather sensitive data about users, groups and network settings. - Often associated with Windows systems like older server versions. - Can be used for information gathering during security testing. - Modern operating systems restrict or disable null sessions by default for security.

34

What is the difference between a threat, a vulnerability, and a risk?

Reference answer

Answering this question calls for a deep understanding of cybersecurity and anyone working in the field should be able to give a strong response. You should expect a follow-up question asking which of the three to focus more on. A simple way to put it: a threat is from someone targeting a vulnerability (or weakness) in the organization that was not mitigated or taken care of since it was not properly identified as a risk.

35

Situational Question Based on the Resume.

Reference answer

Situational or behavioral interview questions are designed to shed light on your communication skills, problem-solving abilities, temperament, and attitude. An interviewer may base situational questions on the content of your resume and inquire about successes, challenges, or conflicts in your previous roles. These types of questions might ask you to discuss a time in a previous role when a data breach caught you by surprise, or an instance in which you disagreed with a teammate about a solution—or a scenario in which a powerful individual requested an exception to bend company policy in a way that would compromise security (eg. allowing use of a home computer for official tasks). Employers will want to know how you managed these situations and what the outcome was.

36

What is your approach to conducting a security audit?

Reference answer

I start by identifying and categorizing the company's assets. I then review and assess vulnerabilities and threats to these assets. After the analysis, I compile a detailed report outlining the findings and suggestions for improving the security posture.

37

How do you investigate a potentially compromised OAuth token in a SaaS environment?

Reference answer

Investigation starts with pulling the audit log from the identity provider. Identify which app holds the token, what scopes it has, and what activity has happened against the user's data since issuance. Revoke the token. Audit other users who authorized the same app. The harder follow-up is about prevention. The panel wants to hear about app governance, conditional access policies that limit consent, and workflows for reviewing third-party apps before they get authorized in the first place.

38

What are common tools used to secure a standard network?

Reference answer

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

39

What do you mean by two-factor authentication?

Reference answer

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

40

What is a Brute Force Attack and how to prevent it?

Reference answer

Automated attack method systematically trying all possible credential combinations until finding the correct one. Prevention strategies including minimum password length/complexity requirements, account lockout after failed attempts, and CAPTCHA implementation. Understanding of why rate limiting and login attempt monitoring are effective countermeasures against automated brute force tools.

41

What is a three-way handshake?

Reference answer

A three-way handshake is a method used in a TCP/IP network to create a connection between a host and a client. It's called a three-way handshake because it is a three-step method in which the client and server exchanges packets. The three steps are as follows: 1xx – Informational responses 2xx – Success 3xx – Redirection 4xx – Client-side error 5xx – Server-side error

42

What Do You Mean by Cybersecurity?

Reference answer

Cybersecurity is the protection of critical systems and sensitive information from digital security threats. The field of cybersecurity encompasses infrastructure security, network security, cloud security, and application security. Cybersecurity protocols are responsible for preventing security breaches that could compromise an organization's data and infrastructure. Cybersecurity encompasses security engineering and architecture, incident response, consulting, testing, and ethical hacking.

43

What are three ways to safeguard against cyber-attacks?

Reference answer

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

44

What Is SSL Encryption?

Reference answer

SSL (Secure Sockets Layer) encryption serves to create a secure internet connection. SSL encryption protects client-client, server-server, and client-server connections, circumventing unauthorized parties from monitoring or tampering with data transmitted online. An updated protocol called TLS (Transport Layer Security) encryption has replaced SSL encryption as the standard security certificate.

45

What is a data leak? How can you detect it and prevent it?

Reference answer

A data leak is when a company's or organization's private data is released to the public in an unauthorized manner. Data leaks can come in many ways such as hacked emails and networks, stolen or lost laptops, or released photos. To prevent a data leak, a company needs to restrict internet uploads, add restrictions to email servers, and restrict the printing of confidential information and data. To detect a data leak, you'll need to: 1) Monitor access to all your networks 2) Evaluate the risk of third-parties 3) Identify and secure sensitive data 4) Encrypt data 5) Secure all endpoints 6) Evaluate permissions across the organization 7) Use cybersecurity risk assessments

46

How do you stay current with security news and emerging threats?

Reference answer

Cyber security changes fast. New vulnerabilities are discovered daily, attackers constantly evolve their tactics, and tools you learned a few months ago might already be outdated, so it's vital to stay current. A strong answer here isn't about listing every blog you follow, but showing that you treat staying informed as an active habit, not a one-off task. Here's how many analysts do it: Security news sources. Sites like Krebs on Security, The Hacker News, and Dark Reading offer daily updates on breaches, threat actor activity, and major vulnerabilities. Threat intelligence feeds. Free or commercial feeds (like AlienVault OTX, Recorded Future, or CISA advisories) help you track active IOCs and attack patterns. Podcasts and YouTube channels. For passive learning during a commute or downtime. Examples include Malicious Life, CyberWire Daily, or John Hammond for hands-on content. Twitter/X and LinkedIn. Many researchers and vendors post zero-day alerts or PoCs here before they make it into official channels. Hands-on platforms. Labs and CTFs (like TryHackMe, Hack The Box, or Immersive Labs) often tie exercises to recent attacks, letting you learn by doing. More important than the sources themselves, is showing how you use them. Well, reading about a CVE is one thing but pulling it into your lab, trying to exploit it safely, and understanding how to detect or block it in your environment is what sets professionals apart.

47

Can you explain the concept of least privilege and how it applies to user access controls?

Reference answer

The principle of least privilege means granting users the minimum level of access necessary to perform their job functions. By limiting access, we reduce the risk of unauthorized actions and potential security breaches. For instance, in my previous role, I implemented least privilege by ensuring that employees only had access to the specific data and systems required for their tasks.

48

Which is more reliable: SSL or HTTPS?

Reference answer

SSL (Secure Sockets Layer) is a secure technology that allows two or more parties to communicate securely over the internet. To provide security, it works on top of HTTP. It works at the Presentation layer. HTTPS (Hypertext Transfer Protocol Secure) is a combination of HTTP and SSL that uses encryption to create a more secure surfing experience. The working of HTTPS involves the top 4 layers of the OSI model, i.e, Application Layer, Presentation Layer, Session Layer, and Transport Layer. SSL is more secure than HTTPS in terms of security.

49

Differentiate between Black Box Testing and White Box Testing.

Reference answer

| Black Box Testing | White Box Testing | |---|---| | It's a type of software testing in which the program's or software's internal structure is concealed. | It is a method of software testing in which the tester is familiar with the software's internal structure or code. | | It is not necessary to have any prior experience with implementation. | It is not necessary to have prior experience with implementation. | | On the basis of the requirement specifications paper, this testing can begin. | This form of software testing begins once the detailed design document has been completed. | | It takes the least amount of time. | It takes the most amount of time. | | It is the software's behavior testing. | It is the software's logic testing. | | It is relevant to higher levels of software testing. | It is relevant to lower levels of software testing. |

50

What is compliance in cybersecurity?

Reference answer

Abiding by a set of standards set by a government/Independent party/organization. E.g. An industry that stores, processes or transmits payment-related information needs to have complied with PCI DSS (Payment card Industry Data Security Standard). Other compliance examples can be an organization complying with its own policies.

51

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

Reference answer

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

52

How does AI affect cyber threats?

Reference answer

Cybersecurity can be made better or worse by AI. Although it assists in the quicker detection and repulsion of attacks, it is also exploited by attackers who use it to create more sophisticated and sinister threats.

53

Differentiate between HIDS and NIDS.

Reference answer

HIDs look at certain host-based actions including what apps are run, what files are accessed, and what information is stored in the kernel logs. NIDs examine the flow of data between computers, often known as network traffic. They basically "sniff" the network for unusual activity. As a result, NIDs can identify a hacker before he can make an unlawful entry, whereas HIDs won't notice anything is wrong until the hacker has already gotten into the system.

54

How do you stay organized when managing multiple security incidents or projects simultaneously?

Reference answer

“I use a combination of tools and discipline. I maintain an incident queue with priorities assigned based on severity and business impact, so I always know what needs immediate attention versus what can wait. For longer-term projects, I break them into tasks with deadlines and track progress in a project management tool. I time-block my calendar—certain hours for incident response, certain hours for project work—so both get attention. When something urgent comes up, I document what I was doing and where I left off so I can return to it. I also communicate status regularly to my manager so there are no surprises. I've learned that over-committing and failing to deliver is worse than saying ‘I'm at capacity right now.'”

55

How do you prioritize vulnerabilities for remediation?

Reference answer

“I use a risk-based approach. First, I look at the CVSS score—vulnerabilities with higher severity scores get higher priority. But CVSS isn't the whole story. I also consider: Is this vulnerability exploitable in our environment? Are we actually running the vulnerable service? What's the business criticality of the affected system? For example, a high-severity vulnerability in a legacy system nobody relies on might be lower priority than a medium-severity vulnerability in our customer-facing application. I also factor in how easy it is to patch—sometimes I'll prioritize easier remediation items to build momentum. I communicate this prioritization to the team so everyone understands the reasoning, not just the order.”

56

What types of web server vulnerabilities do you know?

Reference answer

Default settings are a common source of vulnerabilities, followed by misconfiguration and bugs in the OS and web servers. To fix them, I would change default settings, update the OS, carry out clean and secure installs, and remove dormant or unused accounts. Scanning the web server for vulnerabilities and patch management also helps fix the issues.

57

Have you ever worked for a company that had a data leak? How was it handled?

Reference answer

Reveal more about the experience.

58

Can you explain the difference between true positive, false positive, and false negative?

Reference answer

A true positive is a correct identification of a positive event, meaning that the event is actually happening and is being correctly identified as such by the system or process in question. For example, if a security system correctly identifies an attempted intrusion as a threat, that would be a true positive. On the other hand, a false positive is when a system or process identifies a positive event that is not actually happening. In the case of our security system example, a false positive would be when the system incorrectly identifies a benign event, such as a legitimate user logging in, as a threat. A false negative is when the system doesn't identify an issue when there is one!

59

Define what a security policy is.

Reference answer

A security policy is a document that tells everyone in the organization what the security should be.

60

Walk me through how you would design a detection for a suspected ransomware staging activity.

Reference answer

The senior answer breaks the attack chain into observable phases. Initial access usually shows up in identity logs or endpoint events. Privilege escalation correlates with credential dumping signals. Lateral movement appears as unusual SMB or WMI activity. Inhibit recovery actions are the giveaway: deletion of volume shadow copies, disabling of backups, mass file modification with unusual entropy patterns. The detection lives at that last phase because that is where the activity becomes specific to ransomware versus generic intrusion. Mention that you would feed the detection into a high-priority case rather than a Tier 1 alert, because the response window for ransomware staging is measured in minutes.

61

What is a firewall?

Reference answer

A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

62

Differentiate between spear phishing and phishing?

Reference answer

Spear phishing is a type of phishing assault that targets a small number of high-value targets, usually just one. Phishing usually entails sending a bulk email or message to a big group of people. It implies that spear-phishing will be much more personalized and perhaps more well-researched (for the individual), whereas phishing will be more like a real fishing trip where whoever eats the hook is caught.

63

What is digital forensics?

Reference answer

Scientific process of identifying, preserving, analyzing, and presenting digital evidence in manner acceptable for legal proceedings. Understanding of forensic principles including chain of custody, evidence integrity, and proper documentation procedures. Knowledge of forensic tools and techniques for different evidence sources including disk, memory, network, and mobile forensics.

64

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.

65

What are the elements of cyber security?

Reference answer

Cyber security consists of several key elements that work together to protect systems, networks and data from cyber threats. - Application Security: Protects software applications by identifying and fixing vulnerabilities during development to prevent attacks. - Information Security: Ensures that data is protected from unauthorized access, modification or deletion. - Network Security: Safeguards computer networks from unauthorized access, misuse and cyber threats. - Disaster Recovery & Business Continuity: Focuses on restoring systems and operations quickly after a cyber incident or disaster. - Operational Security (OPSEC): Protects sensitive information by controlling how data is accessed, handled and shared within an organization. - End-User Education: Trains users to recognize and avoid cyber threats, reducing risks caused by human error.

66

Describe your experience with SIEM tools.

Reference answer

In my current role, I work daily with Splunk to monitor security events across our network. I've configured custom dashboards to track authentication failures, unusual network traffic patterns, and potential data exfiltration attempts. Last month, I created a correlation rule that identified a lateral movement attack by detecting unusual administrative account activity across multiple systems within a short timeframe. This led to containing a potential breach within 30 minutes of initial detection.

67

Is Encryption Different From Hashing?

Reference answer

Encryption is a two-way function in which plaintext is converted into illegible ciphertext and then restored to its original plaintext form using a key. Hashing, on the other hand, is a keyless one-way function that converts information into a hash key. This hash key cannot be reversed, meaning that the original information is irretrievable.

68

What is the best standard for a botnet to communicate?

Reference answer

Either HTTP or IRC, since those are the fastest for communication between multiple clients. This is something you would only really know if you were thinking through defensive and offensive operations with tons of different clients like botnets, and will be more of an advanced cybersecurity issue.

69

What is HTTPS?

Reference answer

HTTPS (Hypertext Transfer Protocol Secure) is a secure communication protocol that combines HTTP with SSL/TLS to provide secure communication between a client and a server.

70

What is defense in depth?

Reference answer

Layered security approach using multiple defensive measures so if one fails, others continue providing protection. Understanding of different security layers from physical to application level and how they complement each other. Practical examples demonstrating implementation across people, process, and technology domains.

71

What is the role of encryption in maintaining data confidentiality?

Reference answer

Encryption transforms data into an unreadable format for unauthorized users. It ensures data confidentiality by allowing only those with the correct decryption key to access the original data. Symmetric encryption uses the same key for encryption and decryption, while asymmetric encryption uses different keys.

72

How do you manage security policies within an organization?

Reference answer

Managing security policies within an organization includes: - Conduct a risk assessment to identify security needs - Develop policies aligned with organizational goals and compliance requirements - Involve stakeholders in policy development and revisions - Communicate policies to all employees and provide training - Regularly review and update policies to reflect emerging threats and regulations - Enforce policies through automated controls and audits

73

Could You Define a Man-In-The-Middle (MITM) Attack and Describe Its Potential Impact on Network Security?

Reference answer

This question assesses your understanding of specific cyberattack methodologies and ability to explain complex security threats in an accessible manner. Example: A Man-In-The-Middle (MITM) attack happens when an intruder covertly intercepts and potentially modifies the communication between two parties who assume they are communicating directly. This can result in the theft of login credentials, surveillance of the victim, or disruption of communications. Understanding and explaining these attacks is essential for implementing effective security measures.

74

What is a certificate authority (CA)?

Reference answer

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

75

What is Snort?

Reference answer

Snort is a free open-source intrusion detection software. You should be familiar with different cybersecurity tools and their potential uses, a common topic that is tested in the Security+ certification from CompTIA.

76

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

77

How often do you conduct patch management?

Reference answer

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

78

Explain a Three-Way Handshake.

Reference answer

TCP/IP networks create client-server connections using three-way handshakes, which allow both ends of the connection to reliably transmit data between devices. When a client wants to connect with a server, an SYN (synchronize sequence number) is sent to inform the server of the client's impending request. The server responds with SYN+ACK (acknowledgment), to which the client responds with ACK, thereby establishing a connection through which data will transfer.

79

What is a Distributed Denial of Service attack (DDoS)?

Reference answer

A denial of service (DoS) is a cyber attack against an individual computer or website aimed at denying service to intended users. Its purpose is to interfere with the organization's network operations by denying her access. Denial of service is usually achieved by flooding the target machine or resource with excessive requests, overloading the system and preventing some or all legitimate requests from being satisfied.

80

What is an EDR (Endpoint Detection and Response) solution?

Reference answer

Security solution continuously monitoring endpoints to detect, investigate, and respond to advanced threats and suspicious activities. Understanding of capabilities beyond traditional antivirus including behavioral analysis, threat hunting, and automated response. Experience with specific EDR platforms (CrowdStrike, Carbon Black, SentinelOne) and knowledge of alert triage and investigation workflows.

81

What's your experience with encryption, and can you explain the difference between symmetric and asymmetric encryption?

Reference answer

“Symmetric encryption uses a single shared key to both encrypt and decrypt data—think of it like a password-protected file. It's fast and efficient, so you use it for bulk data encryption. AES is the standard here. Asymmetric encryption uses a pair of keys: a public key for encryption and a private key for decryption. It's slower but solves the key distribution problem—you can publish your public key so anyone can send you encrypted messages. RSA is a common example. In practice, you often see hybrid approaches: asymmetric encryption to securely exchange a symmetric key, then symmetric encryption for the actual data transfer because it's faster. I've worked with implementing SSL/TLS certificates, which use both types.”

82

What is ARP and how does it work?

Reference answer

Address Resolution Protocol maps IP addresses to MAC addresses for local network communication. Understanding of ARP cache and broadcast request/response process for address resolution. Awareness of ARP spoofing attacks and security vulnerabilities inherent in the protocol.

83

What port is typically used by Telnet?

Reference answer

Telnet typically uses port 23. There may be a few questions like this (that are certainly present on the Security+ exam itself) that test your general knowledge of networking and the overall layout of ports and the standards used for each one.

84

What steps would you take if you saw unusual outbound traffic from a user's machine?

Reference answer

Unusual outbound traffic can be an early sign that something's wrong, such as malware communicating with a command-and-control (C2) server, data being exfiltrated, or a compromised account misbehaving. So how you respond shows whether you can investigate without jumping to conclusions, contain the issue, and prevent damage. Here's how most analysts approach this: Validate the alert. First, confirm whether the traffic is actually unusual. False positives are common, so check the destination IP or domain. Does it look suspicious? Is it known on threat intel feeds? What protocol is being used, and what port? Correlate with other logs. Use your SIEM or EDR tool to see what else the system or user was doing around the same time. Were there failed login attempts? New processes? File access or downloads? This helps you understand the broader picture and whether the traffic is part of a larger pattern. Check for known threats. Look up indicators of compromise (IOCs) tied to the destination. Use tools like VirusTotal, URLhaus, or commercial threat intel platforms to see if others have flagged it as malicious. Isolate the host if needed. If you suspect compromise, isolate the system from the network to stop further damage. This might be as simple as disabling the port, blocking outbound traffic, or using EDR containment features. Dig into the root cause. What initiated the traffic? Was it a user action, a scheduled task, or malware? Check process trees, command history, browser sessions, or installed applications to find out what triggered the connection. Remediate and monitor. If you confirm a threat, remove any malware or unauthorized software, reset credentials if needed, and tighten firewall rules or endpoint controls. Keep monitoring the host after remediation to ensure there's no reinfection or missed backdoor.

85

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.

86

What's the difference between red teaming, blue teaming, and purple teaming?

Reference answer

Red, blue, and purple teaming is a structured approach to testing and improving security defenses. It's a deliberate framework used across the industry to simulate attacks, measure detection, defense, and response, and improve over time. Here's how it works: Red teams simulate real-world attackers. Their job is to find weaknesses and exploit them such as phishing users, exploiting vulnerabilities, moving laterally across systems. The goal is to test how well defenses hold up, not just whether a tool catches something. Blue teams are the defenders. They monitor logs, detect suspicious activity, investigate alerts, and respond to threats. In a red team exercise, they often don't know what's coming, which helps simulate the stress and unpredictability of real-world incidents. Purple teaming is about collaboration. So instead of testing defenses in a silo, red and blue teams work together. They share what was done, what was missed, and what needs to improve. Purple teaming turns red vs. blue into a feedback loop that strengthens both offense and defense.

87

What Are the Response Codes That Can Be Received From a Web Application?

Reference answer

When a client sends a request to a web server, a status code is returned to indicate the response that will occur. HTTP response status codes include: - Informational responses (100–199) - Successful responses (200–299) - Redirection messages (300–399) - Client error responses (400–499) - Server error responses (500–599) Response codes relevant to web application security testing include: 301 (moved permanently), 302 (found—temporary redirect), 400 (bad request), 401 (unauthorized), 403 (forbidden), 404 (not found), 405 (method not allowed), and 500 (internal server error).

88

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.

89

Can you explain what a zero-day exploit is?

Reference answer

A zero-day exploit is a cyber attack that occurs on the same day a weakness is discovered in software. Because by definition, it's exploited before a fix is available, zero-day attacks are hard to defend against.

90

How can risk be assessed and reported?

Reference answer

Risk can be reported but it needs to be assessed first. Risk assessment can be done in 2 ways: Quantitative analysis and qualitative analysis. This approach will cater to both technical and business guys. The business guy can see a probable loss in numbers whereas the technical guys will see the impact and frequency. Depending on the audience, the risk can be assessed and reported.

91

What is a public key?

Reference answer

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

92

What is a Zero-Day vulnerability?

Reference answer

Previously unknown software vulnerability that vendors haven't patched, giving defenders 'zero days' to prepare before exploitation. Understanding of why zero-days are highly valuable and dangerous, often used in targeted attacks against high-value targets. Knowledge of defensive approaches including behavior-based detection, network segmentation, and rapid incident response capabilities.

93

You are performing routine daily analysis and whilst checking failed logon activity you find the following (there are 2000 similar events within a small time frame): Please talk us through what you think may be happening and what your next steps are.

Reference answer

A. So immediately I recognized the event id 4625 as a failed logon, with a logon type of 3. This is the network logon type and can occur for a variety of reasons - one being a connection to a shared folder from elsewhere on the network; another reason could be the unsuccessful authentication with psexec, something commonly used by adversaries. B. I then would point out that the one second of time between each failed logon and the fact that there are in excess of 2000 of these within a short time period show that this is not human-based activity and therefore is likely automated. This indicates attempted brute forcing of the user account detailed “localadm” on the FORELA-WKSTN00 host. C. The username being “localadm” looks like a shortened name for “Local Admin”. I would like to confirm if this account is the local admin account used in the environment. D. Now I've confirmed the username and the host attempting to be abused I would ensure that the host is placed into containment. E. I would expand on the current search by performing a search for the event id “4624” or “Successful logon” within the time period of the brute forcing attempts. If a successful attempt is found this confirms that an attacker has likely gained access to FORELA-WKSTNA00 with local elevated privileges, I would: - Recommend confirming if any sensitive information exists on this host and notify the organization's DPO if it does. - Also begin a search for any events that have occurred on FORELA-WKSTNA00. As a priority, I would look for evidence of password dumping as the attacker would likely now attempt to elevate to domain administrative access. F. If EDR is present in the environment, I would utilize it to perform a sweep of the FORELA-WKSTNA00 host. G. I would also expand the search to include the originating host attempting to make the connections. H. Once we've confirmed the originating host, if it is an internal host I would immediately recommend containment. If it's an external host, I would recommend dropping all traffic to and from that host at the firewall. I. Additionally, I would then expand our search in the SIEM platform to look at all events within the time period relevant to the originating host. J. If the local admin account has been utilized for lateral movement, this indicates that the same password is likely used across the environment. Going forward I would recommend utilizing LAPS. K. Additionally I would recommend the full rebuild of the FORELA-WKSTNA00 host.

94

Where do you see the cybersecurity field going in the next three years, and where do you want to be in it?

Reference answer

Have an answer with a thesis. AI in SOC operations. The collapse of perimeter thinking into identity-centric architectures. The way GenAI is changing both the offense and the defense sides of social engineering. Pick a direction and explain why you find it worth investing in. Vague answers about "growing in the field" read as low conviction. Specific answers that connect a real industry shift to a real career bet read as high conviction.

95

Walk me through how you'd secure a web application.

Reference answer

I'd start with input validation to prevent injection attacks, implementing parameterized queries and input sanitization. I'd ensure strong authentication mechanisms, preferably multi-factor, and implement proper session management. All sensitive data should be encrypted in transit and at rest. I'd configure security headers like Content Security Policy and HSTS to leverage browser security features. Finally, I'd implement logging and monitoring to detect attack attempts, with real-time alerting for critical events like multiple failed logins or SQL injection attempts.

96

What are the recommended practices for setting up a firewall to enhance network security while maintaining optimal performance?

Reference answer

This is a bonus question. A strong answer would include configuring default-deny rules, allowing only necessary traffic, segmenting networks, enabling logging and monitoring, and regularly reviewing and updating rules.

97

What's the difference between hashing, encoding, and encryption?

Reference answer

Encoding: transforms data from one format to another for interoperability with no security intent; it's reversible using public algorithms. Encryption: makes data unreadable to unauthorized users, ensuring confidentiality with reversible, key-based algorithms. Hashing: generates an irreversible fixed-length string unique to the input data. It's mostly used to ensure data integrity by comparing the result with the known valid hash. [Auth0]

98

Describe a time that you discovered a security weakness. How did you find and fix it?

Reference answer

Demonstrates problem-solving skills.

99

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

Reference answer

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

100

What Measures Would You Suggest to Deter Identity Theft within a Company?

Reference answer

This question explores your strategies for protecting personal and organizational identity information, reflecting on technical measures and user education. Example: To prevent identity theft, I focus on implementing robust authentication mechanisms, educating employees on phishing and other social engineering attacks, and securing personal data through encryption and access controls. Regular audits and monitoring for unauthorized access to sensitive information are crucial to an identity theft prevention strategy.

101

What is Spoofing?

Reference answer

Spoofing is a type of cyberattack in which an attacker impersonates a legitimate user, device or system to gain unauthorized access, steal data or bypass security measures. It is commonly used to trick users or systems into trusting fake identities. Types of Spoofing: - IP Spoofing: The attacker manipulates the source IP address in network packets to appear as a trusted system. - ARP Spoofing: The attacker sends fake ARP messages on a local network to associate their MAC address with another device's IP, allowing interception of data. - Email Spoofing: The attacker sends emails that appear to come from legitimate sources to deceive users and steal sensitive information.

102

Tell me about a time you had to work under pressure during a security incident.

Reference answer

Using the STAR method: - Situation: “Our e-commerce site went down on Black Friday due to what appeared to be a DDoS attack.” - Task: “As the on-call analyst, I needed to determine if this was just a DDoS or if there was additional malicious activity happening during the chaos.” - Action: “While the network team worked on DDoS mitigation, I monitored our SIEM for signs of other attacks. I discovered unusual database queries hidden within the traffic spike and immediately escalated to our incident response team.” - Result: “We prevented a potential data breach and had the site back up within 2 hours. The incident led to improved coordination procedures between network and security teams.”

103

Explain the future trends in cybersecurity.

Reference answer

i) Intangible burglar alarm systems and automated brainpower: All of this will enable a person to identify potential problems, and work them out. ii) Principle of no trust: forever check, do not just believe. iii) Quantum cryptography will protect data from quantum-attacking machines. iv) Security of the Internet of Things will give better experience in defending interconnected devices. v) Cloud safety includes methods to protect data, which is kept there in various forms.

104

What is a security information and event management (SIEM) system?

Reference answer

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

105

Why is encryption important in network security, and how have you applied it?

Reference answer

Encrypting sensitive data, both at rest and in transit, is crucial for maintaining the confidentiality and integrity of the information. I've worked on projects where we utilized tools like VPNs and SSL/TLS for secure communication across the network.

106

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.

107

What are some of the most common security vulnerabilities in web applications?

Reference answer

Common vulnerabilities include SQL injection, Cross-site Scripting (XSS), Cross-site Request Forgery (CSRF), security misconfigurations, and inadequate input validation.

108

Define the terms virus, malware, and ransomware.

Reference answer

By infecting files and programs on computers, the virus moves across the internet. Among other things, malware is designed to harm computer systems, networks, and servers. The program named ransomware encrypts user files and asks for money inorder to give out decryption keys.

109

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.

110

What is a Firewall?

Reference answer

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

111

What are the common Cyberattacks?

Reference answer

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

112

What are some of the best practices for securing cloud environments?

Reference answer

Best practices for securing cloud environments include: - Strong Access Controls: Implement robust identity and access management. - Patch Management: Keep all softwares and systems up-to-date. - Secure APIs: Ensure secure and well-documented API configurations. - Monitoring and Incident Response: Implement continuous monitoring and a robust incident response plan. - Data Encryption: Use encryption for data at rest and in transit to safeguard sensitive information from unauthorized access. - Regular Audits: Conduct frequent security audits and assessments to identify and remediate vulnerabilities and misconfigurations. - Compliance Adherence: Follow industry and regulatory compliance standards.

113

What is a proxy firewall?

Reference answer

A proxy firewall is a type of firewall that operates at the application layer and monitors traffic by acting as an intermediary between clients and servers. It uses a proxy server to process requests on behalf of users, preventing direct communication with the destination system. This helps in filtering and securing application-level data such as HTTP, FTP and SMTP traffic. - It hides internal network details by masking client identities. - It can inspect and filter content more deeply than traditional firewalls. - It improves security but may introduce slight delays due to extra processing.

114

What is cognitive cybersecurity?

Reference answer

Cognitive Cybersecurity is using AI that relies on human thought processes to uncover threats and protect both digital and physical systems. Using a high-powered computer model, self-learning security systems use natural language processing, data mining, and pattern recognition to mimic the human brain.

115

Can you walk me through the steps you take when performing a vulnerability assessment on a network?

Reference answer

1. Planning and preparation: This involves defining the scope, objectives, and boundaries of the assessment, as well as gathering relevant information about the network, such as IP addresses, system configurations, and network diagrams. 2. Discovery: In this phase, I would use various tools to scan the network for live hosts, open ports, and services running on these hosts. My go-to tools for discovery include Nmap, Netcat, and Wireshark. 3. Vulnerability scanning: After identifying the live hosts and services, I would use vulnerability scanners like Nessus, OpenVAS, or Qualys to detect known vulnerabilities associated with the discovered services. 4. Analysis and validation: This involves analyzing the results of the vulnerability scan to identify false positives and confirm the existence of true vulnerabilities. From what I've seen, manual validation is crucial because automated scanners can sometimes produce inaccurate results. 5. Reporting and remediation: Finally, I would prepare a detailed report outlining the identified vulnerabilities, their severity, and recommended remediation steps. This report is then shared with the relevant stakeholders for timely remediation.

116

What is a public key infrastructure (PKI)?

Reference answer

A PKI is a system that enables the creation, management, and distribution of public-private key pairs for secure communication.

117

Describe your experience with incident response planning and execution.

Reference answer

“In my role at IBM, I established a comprehensive incident response plan that included detailed protocols for each phase of a data breach. When we faced a breach, I coordinated the response team, communicated with key stakeholders, and led the forensic investigation. Following the incident, we conducted a thorough review and updated our security policies, which led to a 40% reduction in similar incidents in the next year. This experience highlighted the need for continuous improvement in our security posture.”

118

What role does employee training play in your information security strategy?

Reference answer

Employee training is crucial in my information security strategy as it significantly reduces the risk of human error, which is often the weakest link in security. Regular training sessions ensure that employees are aware of the latest threats and best practices, fostering a culture of security awareness throughout the organization.

119

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.

120

What is the CIA triad?

Reference answer

CIA stands for confidentiality, integrity, and availability. The CIA triad is used to secure both systems and operations.

121

How often should security policies be reviewed?

Reference answer

There is no fixed time for reviewing the security policy but all this should be done at least once a year. Any changes made should be documented in the revision history of the document and versioning. In case there are any major changes the changes need to be notified to the users as well.

122

How do you approach creating or improving a security awareness training program?

Reference answer

“Training can't be a one-time PowerPoint nobody remembers. I'd make it role-specific—developers need to understand secure coding, HR staff need to focus on phishing and social engineering, and everyone needs basics on password management. I'd use varied formats: interactive modules, quick animated videos, real incident case studies. I'd measure effectiveness by tracking metrics like phishing simulation click rates—these typically drop 20-30% after good training. I'd also make it relevant to the business. Instead of ‘don't click suspicious links,' I'd show, ‘Our competitor just got hit by a phishing campaign that looked exactly like this.' Finally, I'd celebrate wins and reinforce positive behavior, not just punish people for clicking bait.”

123

What is the difference between a detection rule, a correlation rule, and an analytic story?

Reference answer

A detection rule fires on a single condition matching log data. A correlation rule fires when a sequence of conditions hits within a time window. An analytic story is a curated set of detections, hunts, and investigative procedures organized around a specific threat scenario, often borrowed from Splunk's terminology and adopted broadly.

124

Can you describe a time you handled a security breach?

Reference answer

In a previous role, I detected unusual network traffic and identified it as a potential breach. I quickly isolated the affected systems, conducted a thorough investigation, and implemented additional security measures to prevent future incidents. Detailed reports were provided to management and relevant stakeholders.

125

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

126

What is the difference between black hat, white hat, and gray hat hackers?

Reference answer

Black hat hackers break laws for malicious purposes, white hat hackers perform authorized ethical hacking, gray hat hackers operate in between without explicit permission. Understanding of ethical boundaries and legal implications of each category. Recognition that intent, authorization, and legality are key differentiators between these hacker types.

127

What Do You Mean by SQL Injection?

Reference answer

A SQL injection is a type of cyberattack that inserts malicious SQL code via input data to manipulate databases. A properly executed SQL injection can read sensitive data stored in the database, modify that data, execute administration operations, or potentially issue operating system commands. This enables attackers to manipulate data, create repudiation problems, destroy data or restrict access to it, disclose all data within the database, and make themselves administrators of the database server.

128

What is the NIST Cybersecurity Framework?

Reference answer

Voluntary framework providing standards, guidelines, and best practices for managing cybersecurity risks organized into five core functions. Clear explanation of Identify, Protect, Detect, Respond, and Recover functions with examples of activities in each category. Understanding of framework tiers (Partial, Risk Informed, Repeatable, Adaptive) and profiles for assessing current and target security posture.

129

What are some common Hashing functions?

Reference answer

The hash function is a function that converts a specific numerical key or alphanumeric key into a small practical integer value. The mapped integer value is used as an index for hash tables. Simply put, a hash function maps any valid number or string to a small integer that can be used as an index into a hash table. The types of Hash functions are given below: - Division Method. - Mid Square Method. - Folding Method. - Multiplication Method.

130

How would you secure an AWS-hosted web app from common vulnerabilities?

Reference answer

Securing a web app in AWS means protecting both the application layer and the cloud infrastructure it runs on. (Attackers don't care where the weak spot is, whether it's in your code, your misconfigured S3 bucket, or your overly permissive IAM roles). So a good answer here shows that you understand how to think across layers and not just at the surface. Here's how you'd approach it: Start with application security basics. Make sure the app itself follows best practices: Input validation and output encoding to prevent injection attacks (like SQLi or XSS). Use modern authentication protocols (like OAuth or OpenID Connect). Store passwords with strong hashing algorithms (e.g., bcrypt, Argon2). Sanitize file uploads, enforce HTTPS, and implement rate limiting for brute-force protection. Use AWS services to your advantage. AWS offers tools built for secure deployment: Use WAF (Web Application Firewall) to block common attack patterns like SQL injection or XSS. Set up Shield or Shield Advanced to mitigate DDoS attacks. Enable CloudFront for CDN-level security and TLS termination. Store secrets using AWS Secrets Manager, not in environment variables or code. Lock down S3 and other storage buckets. One of the most common AWS mistakes is making S3 buckets public by default. Enable bucket policies to restrict access to trusted services or users only. Use server-side encryption to protect stored data. Enable logging to monitor access and detect misconfigurations early. Harden the EC2 and Lambda environments. If you're using EC2: Only allow required inbound traffic (e.g., HTTPS on port 443). Apply patches regularly using AWS Systems Manager Patch Manager. Use IAM instance roles instead of hardcoded credentials. If you're using serverless (Lambda): Limit each function's permissions to exactly what it needs (principle of least privilege). Monitor invocation patterns to detect abuse or compromise. Use IAM and access control carefully. IAM roles and policies are dangerous if misused. Avoid wildcard permissions (e.g., "s3:*"). Enable MFA for all users, especially root. Regularly audit IAM policies and rotate credentials. Monitor, log, and alert. Enable CloudTrail for auditing AWS API activity. Use GuardDuty to detect suspicious behavior across AWS services. Centralize logs in CloudWatch and set up alerts for anomalies (e.g., unauthorized API calls or sudden traffic spikes).

131

What Is Shoulder Surfing?

Reference answer

Should surfing is a method of data theft by which a bad actor peers over the shoulder of a target in order to steal confidential information like passwords and PIN numbers that can later be used to initiate a cyberattack. Like phishing, shoulder surfing is a social engineering technique—meaning it belongs to a class of information security attacks that rely on psychological manipulation to extract confidential information or influence victims to perform actions counter to their best interests.

132

What is data classification and what are its levels?

Reference answer

Data needs to be segregated into various categories so that its severity can be defined, without this segregation a piece of information can be critical for one but not so critical for others. There can be various levels of data classification depending on organization to organization, in broader terms data can be classified into: Top secret – Its leakage can cause drastic effect to the organization, e.g. trade secrets etc. Confidential – Internal to the company e.g. policy and processes. Public – Publicly available, like newsletters etc.

133

Discuss WAF's differences and use cases (Web Application Firewall) versus traditional network firewalls.

Reference answer

WAFs (Web Application Firewalls) are designed specifically for monitoring HTTP traffic to and from a web application, providing protection against application-layer attacks such as XSS, SQL injection, and CSRF. Traditional network firewalls, on the other hand, control inbound and outbound traffic based on IP addresses, ports, and protocols, offering a broader network perimeter defense without the granularity to address specific web application vulnerabilities. WAFs are used for targeted application security, while network firewalls serve as the first line of defense against general network threats. [Fortinet]

134

What is the difference between a True Positive and a False Positive alert?

Reference answer

True Positive: If the situation to be detected and the detected (triggered alert) situation are the same, it is a True Positive alert. For example, let's say you had a PCR test to find out whether you are Covid19 positive and the test result came back positive. It is True Positive because the condition you want to detect (whether you have Covid19 disease) and the detected condition (being a Covid19 patient) are the same. This is a true positive alert. (LetsDefend) Let's suppose there is a rule to detect SQL Injection attacks and this rule has been triggered because of a request that was made to the following URL. The alert is indeed a “True Positive” as there was a real SQL Injection attack. https://app.letsdefend.io/casemanagement/casedetail/115/src=' OR 1=1 False Positive: In short, it is a false alarm. For example, there is a security camera in your house and if the camera alerts you due to your cat's movements, it is a false positive alert. (LetsDefend) If we look at the URL example below, we see the SQL parameter "Union" keyword within this URL. If an SQL injection alert occurs for this URL, it will be a false positive alert because the “Union” keyword is used to mention a sports team here and not for an SQL injection attack. https://www.google.com/search?q=FC+Union+Berlin

135

What are indicators of compromise?

Reference answer

Indicators of Compromise (IoCs) are pieces of forensic data that identify potentially malicious activity on a system or network. Examples include unusual network traffic, unexpected changes in file integrity, suspicious registry or system file changes, and anomalies in user account behavior. Security teams use IoCs to detect breaches early, facilitating rapid response to mitigate damage. These indicators are crucial for understanding a security threat's scope and taking appropriate corrective actions. [Trend Micro]

136

What are the key components of a secure network architecture?

Reference answer

The key components include firewalls, intrusion detection and prevention systems (IDPS), access control, encryption, regular patching and updating, and network segmentation. Firewalls act as the first line of defense by filtering traffic based on predefined rules. IDPS monitor for malicious activity. Access control ensures only authorized users and devices can access network resources. Encryption protects data at rest and in transit. Regular patching addresses security vulnerabilities, and network segmentation limits the impact of a breach.

137

What is shoulder surfing?

Reference answer

Shoulder surfing is a physical attack that involves actually physically sneaking looks at people's screens as they're typing in information in a semi-public space.

138

What is the difference between spear phishing and phishing?

Reference answer

Phishing is mass-targeted while spear phishing targets specific high-value individuals or small groups with personalized attacks. Understanding that spear phishing involves more research and customization making it more dangerous and harder to detect. Knowledge of different defensive approaches needed for broad phishing campaigns versus targeted spear phishing attempts.

139

What are honeypots?

Reference answer

Honeypots are targets placed for an attack in order to study how different attackers are attempting exploits. While often used in an academic setting, private organizations and governments can use the same idea to study their vulnerabilities.

140

What's your experience with cloud security?

Reference answer

“I've worked with AWS security, particularly around IAM policies, S3 bucket configurations, and security groups. I've helped audit cloud access—making sure developers have the right permissions but not excessive ones, and ensuring data is encrypted both in transit and at rest. One project involved reviewing CloudTrail logs to identify unusual API activity. I've also worked through the shared responsibility model: understanding what AWS manages versus what we're responsible for. I recognize that cloud security differs from on-premises—you can't install endpoint tools everywhere, so you rely more on API monitoring, network segmentation, and encryption. I'm also learning about Azure, and the concepts transfer pretty well.”

141

What's the difference between symmetric and asymmetric encryption?

Reference answer

Encryption is how we keep data private, whether it's being stored or sent across a network. The key difference between symmetric and asymmetric encryption comes down to how the keys work. Symmetric encryption uses the same key to both encrypt and decrypt data. That means both the sender and the receiver need to have access to the same secret key. It's fast and efficient, which makes it a good choice for encrypting large amounts of data such as entire hard drives or internal backups. The downside is key management in that if someone intercepts the key, they can decrypt everything. Asymmetric encryption uses two keys: a public key and a private key. The public key encrypts the data, and only the private key can decrypt it. This is useful when two parties don't already share a key. It's slower than symmetric encryption but essential for things like HTTPS, email encryption (like PGP), and digital signatures. RSA and ECC are common examples. Most modern systems use a mix of both. For example, when you connect to a secure website, asymmetric encryption is used during the initial handshake to exchange a shared key, but after that, symmetric encryption is used for the rest of the session because it's faster.

142

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.'

143

Tell me about a time you had to explain a security incident or risk to non-technical stakeholders.

Reference answer

Situation: We discovered that our company's customer database had weak access controls—multiple employees had overly broad access to sensitive data. Task: I needed to explain the risk to our CEO and board members, most of whom weren't technical, and convince them to invest in remediation. Action: I translated the technical issue into business language: “Right now, any employee with database access can see all customer data, even if they don't need it for their job. If someone's laptop is compromised or they leave the company with bad intentions, we're exposing millions of customers' personal information. Regulators would fine us, customers would lose trust, and we could face legal liability.” I presented three options: ignore it (high risk), fix it immediately (high cost), or implement it over three months (manageable cost, reduced risk). Result: They approved the three-month plan and allocated budget. The board appreciated that I wasn't just saying “this is bad”—I explained why it mattered to the business.

144

What is a security misconfiguration?

Reference answer

It is a security vulnerability caused by incomplete or incorrect misconfiguration.

145

What is a cloud workload protection platform (CWPP)?

Reference answer

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

146

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.'

147

Define VPN.

Reference answer

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

148

What sorts of anomalies would you look for to identify a compromised system?

Reference answer

There are multiple ways to answer this, but again, you need to show your expertise and ingenuity. One possible answer is drawing out a basic network architecture with its IPS/IDS, firewalls, and other security technologies to describe the type of traffic and other signs of compromise. This is the sort of answer you'll need to tackle in order to resolve network security interview questions.

149

What tech blogs do you follow?

Reference answer

Show that you stay current by telling the interviewer how you get your cybersecurity news. These days, there are blogs for everything, but you might also have news sites, newsletters, and books that you can reference.

150

Imagine you've joined our organization and a member of the IT admin team has recently set up a public-facing web server. What advice would you give to help secure it?

Reference answer

Ensure that the server is running the latest version of the operating system and that all security patches and updates are installed. Configure the server's firewall to only allow incoming traffic on the specific ports and protocols that are necessary for the server's operations. Implement strong password policies to ensure that all user accounts on the server are protected with strong, unique passwords. Implement access controls to restrict access to the server and its resources to only authorized users. Enable logging and monitoring to track access to the server and to alert administrators of any potential security threats or anomalies. Regularly perform security assessments and penetration testing to identify potential vulnerabilities and to ensure that the server is properly configured and secured. Place a Web Application Firewall (WAF) in front of the application.

151

How do you stay updated on cybersecurity trends and share that knowledge with your team?

Reference answer

“I regularly follow cybersecurity blogs like Krebs on Security and participate in forums such as Reddit's r/cybersecurity. I also attend workshops and webinars to enhance my skills, and I'm a member of the Australian Cyber Security Centre. Whenever I learn something new, I host knowledge-sharing sessions with my team to ensure we all stay informed and prepared against emerging threats.”

152

An executive wants to bypass security controls for convenience. How do you handle this?

Reference answer

Professional communication skills explaining security risks in business terms focusing on potential impact rather than technical jargon. Problem-solving approach offering alternative solutions that balance security with usability rather than simply saying 'no'. Escalation awareness knowing when to involve CISO or other leadership and documenting risk acceptance if executive proceeds despite recommendations.

153

What is it called when somebody is forced to reveal cryptographic secrets through physical threats?

Reference answer

Attacks like this when you have somebody reveal their secrets due to physical threats are called a rubber hose attack.

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