
Cyber Security Job Interview Warm‑Up: 30 Real Coding & System‑Design Questions
The need for skilled cyber security professionals has never been greater. As organisations rapidly digitise their operations and store increasing amounts of sensitive data online, cyber threats loom large—ranging from sophisticated ransomware attacks to insider threats and state‑sponsored espionage. Against this backdrop, cyber security jobs remain some of the most in‑demand and mission‑critical roles on the market. If you’re preparing for a cyber security interview, expect to be tested on a broad spectrum of topics—from secure coding and incident response to network security architecture and compliance standards. In many cases, companies also include problem‑solving exercises and system design scenarios to gauge how well you can apply theoretical knowledge to real‑world threats. To help you ace these assessments, we’ve compiled 30 real coding & system‑design questions you might encounter. Each reflects a key area of cyber security—whether it’s encryption and key management, threat modelling, or designing a zero‑trust network. Along the way, we’ll offer insights and best practices so you can stand out from the crowd. If you’re on the lookout for exciting cyber security roles in the UK, head to www.cybersecurityjobs.tech. There, you’ll discover a range of positions—covering everything from penetration testing and threat intelligence to compliance management and security operations. Let’s dive into the essentials of interview readiness.