Engineering · Interview Prep
DevOps Engineer Interview Questions
DevOps interviews hinge on production scenarios, not trivia. Expect a live incident walk-through, a Kubernetes failure-mode question, a Terraform design round, and deep probing on SLOs and on-call discipline. This guide covers the questions hiring managers ask and the signals they score.
Try AI Interview PrepTypical loop
3–5 weeks from first contact to offer
Difficulty
High
Question count
14+
Typical interview loop
DevOps and SRE loops lean heavily on real-world scenarios. Expect a live whiteboard incident walk-through where you debug a failing system, a platform-design round where you architect CI/CD or a multi-region setup, and a code-review round for Terraform or shell scripts. On-call discipline and blameless postmortem culture are probed at every level.
- 1Recruiter screen (30 min)
- 2Technical phone screen (60 min Linux/scripting + troubleshooting)
- 3Onsite: incident response / postmortem scenario
- 4Onsite: Kubernetes / infrastructure design
- 5Onsite: Terraform / IaC code review or live build
- 6Onsite: behavioral with platform/engineering leadership
14 real devops engineer interview questions
How to approach this
Systematic check order: (1) kubectl describe pod — look at Events and the last termination reason; (2) kubectl logs --previous — the crash output; (3) check exit code (137 = OOMKilled, 1 = app error, 0 = completed unexpectedly); (4) resource limits vs. actual usage; (5) image pull issues; (6) readiness/liveness probe misconfiguration. Don't restart randomly — the backoff is already giving you the signal. Mention that init-container failures and secrets/configmap issues are common.
Common mistakes
- Restarting the pod without reading previous logs — you lose the crash output
- Missing exit code 137 = OOM — the single most common crash loop cause
- Blaming Kubernetes when the app has a boot-time panic
Likely follow-ups
- What if describe shows no events and logs show nothing?
- How would you prevent this from waking you up at 3 AM?
General interview tips
- ·In incident scenarios, always say mitigate first, root-cause second. It's the single strongest signal of senior DevOps thinking.
- ·When asked about tools, lead with the problem they solved. 'We used ArgoCD to get GitOps and auditability' is stronger than 'I've used ArgoCD.'
- ·Know your DORA metrics: deploy frequency, lead time, change failure rate, MTTR. They're the universal language of DevOps effectiveness.
- ·For Kubernetes questions, always mention the failure mode, not just the happy path. Interviewers know you've read the docs; they want to know you've been paged.
- ·In behavioral rounds, quantify pages-per-week reductions, cost savings, and on-call satisfaction. DevOps impact is measurable — your answers should show it.
FAQ
How technical should I expect a DevOps interview to be in 2026?
Very. Expect to whiteboard Kubernetes internals, read and critique Terraform, and debug a Linux server. The bar has risen — you need to write real code (Python or Go) for custom tooling, not just glue YAML. Expect a shell-scripting round or a small Python exercise at most companies.
Do I need deep Kubernetes internals knowledge?
For platform or SRE roles, yes — know scheduling, the control plane components, how kubelet interacts with containerd, and common CNI/CSI gotchas. For generic DevOps roles, working-level depth on Deployments, Services, Ingress, RBAC, and HPA is enough. Always read the exact job description for signals.
How do DevOps and SRE interviews differ?
SRE loops lean harder into SLO discipline, error budgets, distributed systems, and capacity planning. DevOps loops lean into pipelines, automation, and developer enablement. In practice the rounds overlap heavily. If you're targeting SRE, prep more algorithms and distributed systems theory; if DevOps, prep more automation and platform design.
Are cloud certifications worth bringing up in interviews?
They get you past the resume screen. In the interview itself, they help only if your answers show you can actually apply the knowledge. Don't name-drop AWS Solutions Architect Pro and then fumble a VPC question. If you're certified, be ready to back it up with production experience.
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