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DevOps Engineer Interview Guide

DevOps and SRE Interview Questions

Evaluate DevOps and SRE candidates on Kubernetes, CI/CD, infrastructure as code, observability, and incident response.

Useful DevOps interviews focus on operational judgment: how candidates contain blast radius, design rollouts, debug production systems, and balance velocity with reliability.

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The signal behind strong devops engineer answers.
Section 1

Kubernetes

Test deployment patterns, resource management, and cluster operations.

1. A pod is OOMKilled in production. Walk through how you would diagnose and prevent it.

Interview prompt

Strong signal

Discusses requests/limits, memory profiling, eviction policies, and observability signals.

Follow-up probes

  • •How do you size limits initially?
  • •When is autoscaling not enough?

Red flags

  • •Just raises limits without investigation.
  • •Cannot explain QoS classes.
Section 2

CI/CD

Evaluate pipeline design, rollout strategies, and rollback discipline.

1. Design a deployment pipeline for a service that ships multiple times per day with low risk tolerance.

Interview prompt

Strong signal

Mentions canaries, automated rollback, feature flags, observability gates, and progressive delivery.

Follow-up probes

  • •How do you detect a bad deploy?
  • •What blocks a rollback?

Red flags

  • •Manual approvals at every step.
  • •No rollback path.
Section 3

Observability

Check whether candidates design systems that can be operated after launch.

1. What signals make a service genuinely observable, and which are vanity?

Interview prompt

Strong signal

Talks RED/USE, SLOs, structured logs, traces, alert quality, and on-call experience.

Follow-up probes

  • •What alert would you delete?
  • •How do you avoid alert fatigue?

Red flags

  • •Equates dashboards with observability.
  • •Ignores user-impact signals.

Hire better with structured interviews

Put a candidate through a structured AI or human-led round and get a reportcard with the transcript and the code attached.