DevOps Interview Questions and Answers (2026)

DevOps interviews test both tools and thinking. Interviewers want to know whether you can automate delivery, run reliable systems and work across teams. These DevOps interview questions and answers cover culture, CI/CD, infrastructure as code, containers, monitoring and security.

Culture and concepts

1. What is DevOps?

DevOps is a set of practices and a culture that bring development and operations together. The goal is to deliver software faster and more reliably through collaboration, automation, measurement and shared responsibility.

2. Why do organizations adopt DevOps?

• Faster, more frequent releases.
• Fewer failed changes and quicker recovery.
• Less manual, repetitive work.
• Better collaboration between teams.

3. Name the DORA metrics.

The DORA research programme measures delivery performance with four key metrics: deployment frequency, lead time for changes, change failure rate and time to restore service. Recent reports also discuss reliability.

4. DevOps vs SRE?

DevOps is a broad culture and set of practices. Site reliability engineering (SRE), developed at Google, is one concrete way to implement it, using service level objectives (SLOs), error budgets and engineering work to reduce toil.

CI/CD

5. Describe a typical CI/CD pipeline.

1. A developer pushes code and opens a pull request.
2. CI builds the code and runs unit tests, linting and security scans.
3. The pipeline builds an artefact, such as a container image, and stores it in a registry.
4. Next, it deploys to a test environment and runs integration tests.
5. After approval or automatic checks, it deploys to production.
6. Finally, monitoring confirms the release is healthy.

6. Explain common deployment strategies.

• Rolling: replace instances gradually.
• Blue-green: run two environments and switch traffic at once, with fast rollback.
• Canary: release to a small percentage of users first, then expand.
• Feature flags: deploy code switched off, then enable it for chosen users.

7. What is trunk-based development?

Developers merge small changes to the main branch at least daily, often hidden behind feature flags. This reduces painful merges and supports continuous delivery.

Infrastructure and containers

8. What is infrastructure as code (IaC)?

IaC defines servers, networks and cloud resources in code, using tools such as Terraform, OpenTofu, CloudFormation or Pulumi. As a result, environments are repeatable, reviewable and version-controlled.

9. Configuration management vs provisioning?

Provisioning tools, such as Terraform, create infrastructure. Configuration management tools, such as Ansible, configure what runs on it. See our Ansible interview questions.

10. Why use containers?

Containers package an app with its dependencies, so it runs the same everywhere. They start fast and use resources efficiently. See our Docker interview questions.

11. What does Kubernetes do?

Kubernetes orchestrates containers: it schedules them on nodes, restarts failed ones, scales them and manages networking, configuration and rolling updates.

12. What is GitOps?

In GitOps, Git holds the desired state of infrastructure and applications. A tool such as Argo CD or Flux continuously syncs the cluster to match Git.

Monitoring and reliability

13. Monitoring vs observability?

Monitoring tracks known metrics and alerts on thresholds. Observability uses metrics, logs and traces to understand unknown problems. Common tools include Prometheus, Grafana, OpenTelemetry and the ELK stack.

14. How do you handle an incident?

Detect and acknowledge it, communicate status, mitigate impact first, then find the root cause. Afterwards, run a blameless post-incident review and track follow-up actions.

Security

15. What is DevSecOps?

DevSecOps builds security into every stage of the pipeline: secure coding, dependency and secret scanning, infrastructure checks and runtime monitoring. See our DevSecOps interview questions.

16. How do you manage secrets in pipelines?

Use a secrets manager or the CI platform’s encrypted secrets, give pipelines short-lived credentials, and never store secrets in code.

For more, see Jenkins and Git interview questions.

Keep preparing

Practise each answer out loud, and run the commands in a lab rather than memorising them. Interviewers often ask follow-up questions, so make sure you understand why each answer is true.

Sources

• DORA research program

Preparing for an interview? Browse more questions in our interview preparation hub. For businesses, we also offer security services such as VAPT, server hardening and ISO 27001 readiness.