Top 15 DevOps Engineer Interview Questions

Describe a major production incident and how you managed it.

💡 Tip: Show incident management process, communication, and post-mortem culture.

Tell me about migrating infrastructure to the cloud or between cloud providers.

💡 Tip: Show planning, risk mitigation, and rollback strategies.

Describe implementing monitoring and alerting for a production system.

💡 Tip: Show how you balanced alert fatigue with coverage.

Tell me about a time you improved deployment frequency or reliability.

💡 Tip: Use metrics — deployment frequency, lead time, failure rate, MTTR.

Describe a time you had to troubleshoot a networking issue.

💡 Tip: Show systematic debugging — DNS, routing, firewalls, load balancers.

Describe a time you automated a manual operational process.

💡 Tip: Quantify time saved and error reduction.

Tell me about a time you had to balance velocity with stability.

💡 Tip: Show nuanced thinking about change management and risk.

How do you approach infrastructure as code?

💡 Tip: Discuss Terraform/Pulumi patterns, testing, and state management.

How do you handle security in your infrastructure?

💡 Tip: Cover secrets management, network policies, and compliance.

How do you manage cost optimization in cloud infrastructure?

💡 Tip: Show awareness of reserved instances, right-sizing, and cost monitoring.

Tell me about your approach to disaster recovery planning.

💡 Tip: Cover RPO, RTO, backup strategies, and testing.

How do you collaborate with development teams on reliability?

💡 Tip: Show SRE principles — SLOs, error budgets, shared ownership.

Tell me about a CI/CD pipeline you designed or improved.

💡 Tip: Focus on build time reduction, reliability improvements, and developer experience.

Tell me about implementing containerization or orchestration.

💡 Tip: Discuss Docker/Kubernetes decisions and challenges faced.

Describe implementing auto-scaling for a high-traffic application.

💡 Tip: Discuss metrics-based scaling, load testing, and capacity planning.