Over the last two weeks, I attended several technical interviews for cybersecurity roles and…

Over the last two weeks, I attended several technical interviews for cybersecurity roles and secured 3 offers so thought I am eligible to write this article. Each interviewer had a different style, and every interview tested a different part of my knowledge.

At first, I thought every interview would follow the same pattern.

I was wrong.

Each interview was different. But once I had finished all of them, I noticed something important: every interviewer expected the same foundation.

This article isn't about how many interviews I passed. It's about what I learned and what I think every aspiring cybersecurity professional should focus on.

Interview 1 — Networking First

The first interview was almost entirely about networking.

The interviewer didn't want simple definitions. He wanted me to explain how things actually work.

Instead of asking, "What is DNS?", he asked questions like:

• What happens when you type abc.com into a browser?
• Why is DNS important?
• How would you troubleshoot DNS if it stopped working?
• How does ARP work?
• Can you explain the TCP three-way handshake?
• Why do we need NAT?
• Sub-netting
• What happens to a packet as it passes through multiple routers?

This wasn't about memorizing textbook answers. It was about understanding how communication really happens inside a network.

That's when it hit me: Networking is one of the strongest pillars of cybersecurity.( Got offer letter )

Interview 2 — Hands-On Skills Matter

The second interview was completely different.

Instead of theory, the interviewer wanted to know what I had actually built and practiced.

Some of the questions included:

• Which TryHackMe or Hack The Box labs have you completed?
• Have you analyzed malware before?
• Tell me about an attack you carried out in a lab.
• What vulnerabilities have you exploited?
• What's the difference between a vulnerability and an exploit?
• What is a Zero-Day vulnerability?

The interviewer wasn't interested in answers copied from Google. He wanted proof that I had actually spent time learning by doing.

Hands-on practice gave me confidence because I could talk about what I had personally seen and done instead of repeating memorized answers.(Cleared the Interview)

Interview 3 — Blue Team and Security Operations

The third interview focused on Security Operations.

Topics included:

• Security incidents
• SIEM
• Antivirus
• Endpoint Detection and Response (EDR)
• Malware and ransomware
• Windows Event Logs
• Security alerts
• Incident prioritization

Some of the questions were:

• What's the difference between Antivirus and EDR?
• How does Antivirus detect malware?
• If you had to design an Antivirus solution, how would you approach it?
• How would you investigate a security alert?
• What would be your first step after receiving a malware alert?
• How do you reduce false positives?

These questions weren't testing memory. They were testing how I think.(Got offer and accepted it)

The Common Foundation

Every interview looked different on the surface, but underneath, they all relied on the same core knowledge.

If your fundamentals are weak, advanced questions become very difficult to answer.

Here's what I believe every cybersecurity candidate should master:

• Networking
• Operating Systems
• File Systems
• Active Directory
• Windows and Linux basics
• Security Alerts
• Incident Response
• SIEM concepts
• Log Analysis
• Common attack techniques

These fundamentals appear in almost every cybersecurity interview, regardless of the company.

The Biggest Difference Between Average and Good Candidates

Here's the one lesson that stood out the most.

Most candidates prepare only for technical questions. Very few prepare for scenario-based questions and your communication matters a lot in this cyber security roles (tip: express your thoughts freely and keep a little smile in face and show enthusiasm while explaining!!).

For example:

"An employee reports that their system is behaving abnormally. How would you investigate?"

There isn't one perfect answer.

What the interviewer really wants to know is:

• How do you think?
• How do you prioritize?
• Do you panic under pressure?
• Can you communicate clearly?
• Can you explain technical findings to someone who isn't technical?

Many candidates believe using complex cybersecurity jargon will impress the interviewer.

In reality, interviewers care much more about your reasoning and communication than the number of technical buzzwords you know.

If you've worked on a lab, solved a challenge, or investigated a simulated incident, use those experiences while answering.

Real examples are always more convincing than memorized definitions.

Learn Programming. Learn How Computers Work.

This is the one piece of advice I want every cybersecurity beginner to hear.

Learn programming. Learn how a computer actually works.

You can't effectively find or fix bugs if you don't understand what's happening underneath.

Programming isn't just for software developers — it is equally important in cybersecurity.

Think about it:

• Malware is written in code.
• Ransomware is written in code.
• Exploits are written in code.
• Security tools are written in code.
• Automation scripts are written in code.

If you're on a Red Team, you won't always find a ready-made tool for every engagement. Sometimes you'll need to automate repetitive tasks or build your own utilities.

If you're on a Blue Team, scripting can help automate log analysis, speed up investigations, and eliminate repetitive work.

Understanding programming also helps you understand how attackers think because most attacks exploit the behavior of software.

The better you understand operating systems, memory, processes, networking, and programming, the easier it becomes to understand vulnerabilities and security incidents. (If you don't know how to code, do learn it first and return back to the cyber security concepts)

My Preparation Strategy

Before every interview, I focused on strengthening my fundamentals instead of memorizing hundreds of interview questions.

Here's what I did:

• Revised Networking fundamentals
• Revised Operating Systems and File Systems
• Reviewed Active Directory basics
• Practiced labs on TryHackMe
• Solved Hack The Box machines
• Read about real-world security incidents
• Reviewed common attack techniques
• Studied how malware works
• Learned how security tools detect threats

Hands-on practice helped me far more than passive reading ever did.

My Advice to Beginners

If you're just starting your cybersecurity journey, don't rush into advanced topics before mastering the basics.

Build a strong foundation in:

• Networking
• Operating Systems
• Programming
• Active Directory
• Linux
• Windows Internals
• Security Monitoring
• SIEM
• Incident Response

Then practice consistently.

Build home labs.

Break things.

Fix them.

Read write-ups.

Analyze real-world security incidents.

The more you practice, the more naturally you'll answer interview questions because your answers will come from experience — not memory.

Final Thoughts

Cybersecurity isn't an isolated field. It's an extension of almost every area of software engineering and IT.

Whether you're securing a web application, a cloud environment, a network, an operating system, or a mobile application, the first step is always the same: understand how that technology actually works.

You can't effectively find or fix vulnerabilities without understanding the system beneath them. A security professional who doesn't understand how software, operating systems, networks, or applications function will always struggle to analyze security problems deeply.

That's why I believe every aspiring cybersecurity professional should invest time in learning:

• How computers work
• Operating Systems and File Systems
• Networking fundamentals
• Programming
• Software architecture and how applications actually function

The stronger your fundamentals, the easier it becomes to understand vulnerabilities, analyze attacks, investigate incidents, and build effective defenses.

Cybersecurity isn't about memorizing tools or interview questions. It's about understanding systems, thinking like an engineer, and continuously learning as technology evolves.

Master the fundamentals. Stay curious. Never stop learning. Tools will come and go, but strong fundamentals will always remain your greatest strength.

#CyberSecurity #SOC #BlueTeam #Networking #OperatingSystems #ActiveDirectory #SIEM #Programming #TryHackMe #HackTheBox #InformationSecurity #CareerGrowth