How I Went From Interview Rejections to Building a 200+ Question Open‑Source Cybersecurity Resource

And why I’m giving it away for free.

I remember the exact moment I realised I was doing interview prep all wrong.

I had just finished yet another technical interview that I thought went well. I knew the CIA triad. I could explain SQL injection. I’d even practised my STAR method answers.

Then the interviewer asked: “Walk me through how you’d respond to a ransomware outbreak across 200 servers.”

I froze.

Not because I didn’t know the answer — but because I’d never thought about interviews that way. I’d been memorising definitions when I should have been learning how security professionals actually think.

The Problem With Most Interview Prep

Here’s the reality: most cybersecurity interview resources are a mess.

• Scattered PDFs that are years out of date
• Random blog posts with conflicting answers
• Paywalled courses that cost hundreds of pounds
• Practice questions with no explanations — just “here’s the right answer, trust us”

Sound familiar?

I wasted months bouncing between these. Every time I thought I was prepared, a curveball question would expose another gap. I was building my knowledge on shaky foundations — and interviewers could tell.

So I did what any frustrated engineer would do.

I built my own.

Enter: 200+ Cybersecurity Interview Questions (Free & Open Source)

After six months of collecting, curating, and validating, I’m releasing what I wish I’d had from day one:

A free, open‑source collection of 200+ cybersecurity interview questions and answers.

Incidence Response — Macro Questions — Excalibra Cybersecurity Interview Questions

Here’s what makes it different:

• Every question is practical and interview‑relevant.
• Organised by domain — Red Team, Blue Team, Web Security, Incident Response, Network Security, Systems, Tools, and more.
• Searchable live website — find topics instantly, no scrolling through a massive README.
• Continuously updated — this isn’t a one‑and‑done PDF. It’s a living resource that grows with the community.

**excalibra.github.io/cybersecurity-interview-questions [github.com/Excalibra/cybersecurity-interview-questions](https://github.com/Excalibra/cybersecurity-interview-questions)**

What’s Inside?

The repository is organised into logical sections so you can focus on what matters most for your next interview:

• Section: Red Team What You’ll Find: Exploitation, evasion, deserialisation, WAF bypass, domain attacks, persistence
• Section: Blue Team What You’ll Find: Incident response, log analysis, intrusion detection, traceability, system hardening
• Section: Web Security What You’ll Find: SQLi, XSS, CSRF, SSRF, file uploads, logic flaws
• Section: Network Security What You’ll Find: ARP, DNS, TCP/UDP, DDoS, OSI model, routing protocols, firewalls, SSL/TLS
• Section: Incident Response What You’ll Find: Threat intelligence, malware detection, honeypots, forensic analysis
• Section: Internal Network Penetration What You’ll Find: Lateral movement, domain controller attacks, golden/silver tickets, tunnelling
• Section: Systems What You’ll Find: Windows/Linux hardening, privilege escalation, persistence detection
• Section: Tools What You’ll Find: Nmap, sqlmap, webshells, proxies, tunnelling tools
• Section: Computer Networks What You’ll Find: OSI model, TCP/IP fundamentals
• Section: Traceability & Traffic Analysis What You’ll Find: Wireshark, traffic patterns, attack attribution

And yes — I recently added a dedicated Blue Team section with 70+ questions. Because defence matters just as much as offence.

What People Are Saying

“I wish I had this when I was preparing for my first security role.” — Anonymous Reddit user

“Finally, a resource that actually explains why the answer is what it is.” — Early contributor

“The searchable live site is a game‑changer. No more scrolling through endless Markdown files.” — Community member

How You Can Help

If this resource helps you, here are a few ways to give back:

1. ⭐ Star the repository — it helps others discover it.
2. Share it — with your network, on LinkedIn, Reddit, or Discord.
3. Contribute — open an issue or PR with improvements.
4. Use it — and let me know what topics you’d like to see next.

One Last Thing

Interview prep isn’t about memorising trivia. It’s about building the mental models that help you think like a security professional.

This repository won’t guarantee you a job. But it will give you a structured, practical foundation — so when the interviewer throws a curveball, you’re ready.

Not because you memorised the answer. But because you understand why it’s the answer.

Check it out here: 🔗 **excalibra.github.io/cybersecurity-interview-questions 🔗 [github.com/Excalibra/cybersecurity-interview-questions](https://github.com/Excalibra/cybersecurity-interview-questions)**

If this helped you, please consider giving it a star ⭐ — it makes a huge difference in helping others find it.