2026

DevOps Interview Questions 2026

A current, 2026 snapshot of the DevOps interview questions worth knowing — kept up to date as frameworks and best practices evolve, so you prepare with what companies are actually asking in 2026.

60Questions14Beginner13Intermediate33Senior

60 DevOps questions

  1. 1What is Jenkins Declarative vs Scripted Pipeline?Intermediate
  2. 2Explain Docker Compose vs Kubernetes.Intermediate
  3. 3Prometheus Metrics vs Logs vs Traces.Intermediate
  4. 4What is GitOps?Intermediate
  5. 5What is a VPC (Virtual Private Cloud)?Intermediate
  6. 6Explain AWS IAM Roles vs Policies.Intermediate
  7. 7What is a Canary Deployment?Intermediate
  8. 8Ansible vs Terraform: When to use which?Intermediate
  9. 9What is the Terraform State file?Intermediate
  10. 10Explain Kubernetes Pod vs Container.Intermediate
  11. 11How does DNS Resolution work?Beginner
  12. 12What is a Blue/Green Deployment?Beginner
  13. 13Explain Linux File Permissions (chmod).Beginner
  14. 14What is a Reverse Proxy?Beginner
  15. 15How does SSH key authentication work?Beginner
  16. 16What is Infrastructure as Code (IaC)?Beginner
  17. 17What is Git and how does branching work?Beginner
  18. 18Explain Docker vs Virtual Machines.Beginner
  19. 19What is CI/CD?Beginner
  20. 20What is DevOps?Beginner
  21. 21DevOps Interview Question 2 (Free)Intermediate
  22. 22DevOps Interview Question 1 (Free)Beginner
  23. 23DevOps Interview Question 5 (Free)Intermediate
  24. 24DevOps Interview Question 4 (Free)Beginner
  25. 25DevOps Interview Question 3 (Free)Senior
  26. 26Managing Drift in Infrastructure as Code.Senior
  27. 27CI/CD Runner Scaling (Self-hosted).Senior
  28. 28FinOps (Cloud Cost Optimization).Senior
  29. 29Kubernetes Ingress vs Gateway API.Senior
  30. 30Rate Limiting & Throttling (API Gateways).Senior
  31. 31Sidecar Pattern vs DaemonSet.Senior
  32. 32Spinnaker vs ArgoCD.Senior
  33. 33Immutable Infrastructure.Senior
  34. 34BGP and Cloud Routing.Senior
  35. 35StatefulSets vs Deployments in Kubernetes.Senior
  36. 36Multi-Cloud vs Hybrid Cloud Networking.Senior
  37. 37OpenTelemetry vs Jaeger.Senior
  38. 38Mutual TLS (mTLS).Senior
  39. 39Serverless Cold Starts & Optimizations.Senior
  40. 40Ephemeral Environments.Senior
  41. 41Autoscaling in Kubernetes (HPA, VPA, Cluster Autoscaler, Karpenter).Senior
  42. 42ArgoCD and Flux (GitOps Reconciliation Loop).Senior
  43. 43Multi-Tenant Kubernetes Clusters.Senior
  44. 44OOMKilled in Kubernetes (Requests vs Limits).Senior
  45. 45Kubernetes Network Policies.Senior
  46. 46DevSecOps and Shift-Left Security.Senior
  47. 47Chaos Engineering principles.Senior
  48. 48Zero-Downtime Database Migrations.Senior
  49. 49Disaster Recovery (RPO vs RTO).Senior
  50. 50eBPF for Observability and Security.Senior
  51. 51Kubernetes Operators and CRDs.Senior
  52. 52SRE Error Budgets & SLIs/SLOs/SLAs.Senior
  53. 53HashiCorp Vault Secrets Management.Senior
  54. 54Managing Terraform State at Scale.Senior
  55. 55What is a Kubernetes Service Mesh (e.g., Istio)?Senior
  56. 56DevOps Advanced Interview Question 10Beginner
  57. 57DevOps Advanced Interview Question 9Senior
  58. 58DevOps Advanced Interview Question 8Intermediate
  59. 59DevOps Advanced Interview Question 7Beginner
  60. 60DevOps Advanced Interview Question 6Senior

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Frequently asked questions

Are these DevOps interview questions up to date for 2026?

Yes. This page reflects 60 DevOps interview questions kept current with today's frameworks, tooling and interview trends, with each answer maintained and dated.

What DevOps topics should I focus on in 2026?

Prioritise the fundamentals plus the modern patterns interviewers ask about now. Each question here includes a detailed answer, code example and common mistakes so you can target the highest-impact areas.

Are these questions free?

You can read the question and a short answer for free. A subscription unlocks the full detailed explanation, real-world example, common mistakes and follow-up questions for each one.