DevOps Engineer Interview Questions (With Hints)
6 questions covering behavioral, technical, and situational scenarios. Each answer hint reflects what interviewers at top companies are actually evaluating.
Behavioral Questions
Q: Explain how you've handled a major production incident caused by an infrastructure change.
What they're looking for: They're evaluating your incident management process, root cause analysis, and whether you implemented changes to prevent recurrence.
Technical Questions
Q: Design a CI/CD pipeline for a microservices application with 20 independent services. What tools and stages would you include?
What they're looking for: Cover source control branching strategy, build caching, parallel testing, artifact management, environment promotion, and rollback mechanisms.
Q: How would you implement observability for a distributed system with 50+ microservices?
What they're looking for: Cover the three pillars: metrics (Prometheus/Grafana), logging (ELK, Loki), and tracing (Jaeger, Zipkin). Service mesh considerations matter here.
Q: Describe how Kubernetes manages pod scheduling and what happens when a node fails.
What they're looking for: Cover scheduler, kube-controller-manager, node controller, pod disruption budgets, and how ReplicaSets ensure desired state.
Situational Questions
Q: How would you migrate a monolithic application to Kubernetes with zero-downtime?
What they're looking for: Phased approach: containerization, health checks, load balancer configuration, canary deployments, and stateful service handling.
Q: A deploy just caused 500 errors for 10% of users. What do you do in the first 5 minutes?
What they're looking for: Immediate rollback vs. forward fix decision, customer communication, log collection, alerting thresholds, and post-mortem process.
How to Prepare
For behavioral questions, prepare 6–8 specific stories from your experience using the STAR format (Situation, Task, Action, Result). Practice answers out loud — not in your head — at least three times per question. Technical questions for DevOps Engineer roles require domain-specific preparation; review the skills list and be prepared to demonstrate hands-on knowledge, not just conceptual understanding.