Interview Questions for a DevOps Engineer
To interview a DevOps engineer, test CI/CD pipelines, infrastructure as code, containers and orchestration, observability, and incident response. This set probes how candidates automate deployments, reason about reliability and security, manage configuration and secrets, and respond when production breaks at 3 a.m.
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Run a DevOps interview around real operational scenarios: pipelines, deployments, outages, and scaling, plus a hands-on or whiteboard exercise on infrastructure as code. Reward automation instinct, a blameless reliability mindset, and security awareness.
Technical & Role-Specific
What to look for: Build, test, artifact, deploy stages; gates and rollbacks; environment promotion; and what makes the pipeline trustworthy and fast.
What to look for: Understands risk trade-offs, rollback speed, traffic shifting, and the infrastructure cost of each strategy.
What to look for: Declarative tooling like Terraform, state management, code review for infra, and detecting drift rather than manual console changes.
What to look for: A secrets manager or vault, injection at runtime, rotation, least privilege, and scanning to catch accidental commits.
What to look for: The golden signals (latency, traffic, errors, saturation), SLOs and error budgets, and actionable alerts over noisy ones.
What to look for: Reads logs and events, checks resource limits, liveness probes, image and config issues, and reasons methodically rather than restarting blindly.
What to look for: Immutable artifacts, versioned releases, backward-compatible migrations, feature flags, and a tested rollback path.
What to look for: Scales on the right signal (CPU, queue depth, request latency), sets sane min and max, and accounts for warm-up time and cost.
Behavioral
What to look for: Calm under pressure, clear communication, a blameless post-mortem, and concrete prevention like alerts, runbooks, or automation.
What to look for: Bias toward eliminating toil, measuring time saved or errors reduced, and improving reliability not just convenience.
What to look for: Uses guardrails like progressive delivery and error budgets to enable speed safely rather than treating them as opposites.
What to look for: Builds trust, leads with developer experience, demonstrates value with a pilot, and brings the team along rather than mandating.
Situational / Problem-Solving
What to look for: Compares environments, checks for config and data differences, race conditions, and resource limits, and adds observability.
What to look for: Uses cost tooling and tags, finds the spiking resource, checks for orphaned infra or misconfigured autoscaling, and fixes it.
What to look for: Protects the pipeline as the source of truth, finds a safe expedited path, and avoids one-off changes that cause drift.
What to look for: Tunes thresholds to symptoms users feel, ties alerts to SLOs, removes noisy non-actionable alerts, and prevents alert fatigue.
DevOps Engineer interview scorecard
Score every candidate on the same criteria, immediately after the interview, using evidence you actually heard rather than an overall impression. Agree the criteria with the panel before the first interview — deciding what counts after you have met people is how the loudest interviewer wins the debrief.
| Criterion | Evidence to record | Score 1-5 |
|---|---|---|
| Technical & Role-Specific | What the candidate actually said or did, in their own example — not your impression of it | 1 2 3 4 5 |
| Behavioral | What the candidate actually said or did, in their own example — not your impression of it | 1 2 3 4 5 |
| Situational / Problem-Solving | What the candidate actually said or did, in their own example — not your impression of it | 1 2 3 4 5 |
| Overall recommendation | Strong no / no / mixed / yes / strong yes, with the single reason that decided it | - |
Want this as a reusable document? Use the interview scorecard template.
Questions to avoid asking a DevOps Engineer
Exactly which questions are unlawful depends on where you are hiring, and the rules change — so treat this as the list of topics to route through your own employment counsel, not as a legal standard. The practical test that holds everywhere: if the answer could not change how the person does this job, you have no reason to ask it.
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Frequently asked questions
How many interview rounds for a DevOps Engineer?
Should I give a hands-on lab in a DevOps interview?
How important is the on-call and incident mindset?
What security knowledge should a DevOps engineer have?
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