DevOps Engineer Interview Questions

DevOps Engineer interviews at top tech companies typically assess these competency areas:

These questions are drawn from real interview loops at FAANG and top-tier tech companies in 2025–2026. Click Practice now to run a full AI mock session for any question.

1. 1

   Design a multi-region active-active deployment strategy.

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2. 2

   Write a Terraform module for a VPC + EKS cluster + RDS.

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3. 3

   How do you handle secrets in a Kubernetes cluster?

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4. 4

   Diagnose: pods are CrashLoopBackOff in prod but fine in staging.

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5. 5

   Compare blue-green vs canary vs rolling deploys.

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6. 6

   Build a CI pipeline that runs tests, builds, scans, and deploys with manual approval.

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7. 7

   How do you achieve four-nines uptime for a payment service?

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8. 8

   Walk me through your biggest production incident — RCA, action items, lessons.

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9. 9

   Design a logging + tracing stack for a 200-service microservices estate.

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10. 10

    When would you use service mesh? Istio vs Linkerd vs no mesh?

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• ✓Be deep on one cloud (usually AWS) and know one other at a working level.
• ✓Practice writing Terraform from a blank file in 20 minutes.
• ✓Have war stories ready — interviewers want to hear how you act under pressure.
• ✓Know SLO/SLI/SLA vocabulary cold.

Include these high-signal keywords in your DevOps Engineer resume to pass ATS filters at top companies.