DevOps interviews can move very quickly from "What is CI/CD?" to "Production is down. What do you do?"
This pocket guide is built for that second question.
The DevOps Interview Pocket Guide: 25 Questions You Should Be Able to Answer is a compact refresher for DevOps engineers preparing for technical interviews or simply wanting to sharpen the way they think through real production problems.
Inside, you'll find concise explanations of the areas that come up again and again in DevOps interviews, including CI/CD, Docker, Kubernetes, Terraform, cloud networking, infrastructure as code, monitoring, reliability and incident response.
The guide then moves into 25 harder scenario-based questions with practical answers. What happens when a Kubernetes pod is OOMKilled? What should you do when Terraform wants to recreate a production database? How do you rotate a secret without causing downtime? What happens when a deployment cannot be rolled back? What should you investigate when a queue starts growing faster than consumers can process it?
The focus is not on memorising commands or reciting definitions. It is on understanding how to approach a problem: establish the impact, gather evidence, reduce the blast radius, restore service safely and investigate the root cause.
Small enough to read in one sitting and keep nearby for quick revision, this guide is designed for engineers who want useful answers without hundreds of pages of theory.
Topics include:
CI/CD and deployment strategies
Docker and Kubernetes troubleshooting
Terraform and infrastructure as code
Cloud networking and IAM
Monitoring and observability
Production incidents and recovery
Secrets and security
Reliability and system design
25 difficult DevOps interview questions with answers
A short guide for a very broad job.
