Azure DevOps Interview Questions & Answers

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Azure DevOps Interview Questions & Answers

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1️⃣ Essential (Basic) Questions

These test your foundation.

1. What is Azure DevOps?
Azure DevOps is Microsoft’s cloud service providing DevOps tools for planning, developing, testing, delivering, and monitoring applications. It integrates Azure Boards, Repos, Pipelines, Test Plans, and Artifacts.

2. What services are included in Azure DevOps?

• Azure Boards – Agile project tracking (Kanban, Scrum).
• Azure Repos – Git repositories or TFVC for source control.
• Azure Pipelines – CI/CD automation.
• Azure Test Plans – Manual and automated testing tools.
• Azure Artifacts – Package hosting and sharing.

3. Difference between Git and TFVC in Azure Repos?

• Git – Distributed version control (branches locally).
• TFVC – Centralized version control (one central server).

4. What is a pipeline in Azure DevOps?
A workflow that builds, tests, and deploys code.

5. What are YAML pipelines?
Text-based pipelines stored in source control, defining CI/CD workflows as code.

6. Difference between Classic and YAML pipelines?

• Classic – Visual designer UI.
• YAML – Code-defined, version-controlled.

7. What is the purpose of Azure Artifacts?
To host NuGet, npm, Maven, or Python packages for reuse.

8. How do you integrate Azure DevOps with GitHub?
By connecting Azure Pipelines to GitHub repos and setting triggers.

9. What is a Service Connection in Azure DevOps?
A secured connection to external resources (Azure, AWS, DockerHub).

10. What is a Build Agent?
A machine that runs the steps in your pipeline.

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2️⃣ Advanced Questions

These show your deeper understanding.

11. Difference between Hosted and Self-Hosted Agents?

• Hosted – Provided by Microsoft, ephemeral.
• Self-hosted – Installed and managed by you for more control.

12. How do you secure secrets in pipelines?
Store them in:

• Azure Key Vault and link to pipeline.
• Pipeline variable groups with secrets enabled.

13. How do you implement multi-stage pipelines?
Define multiple stages in YAML or environments in Classic, with approvals between them.

14. What is a Deployment Group?
A set of target machines to which the pipeline deploys.

15. What is the difference between CI and CD in Azure Pipelines?

• CI (Continuous Integration) – Automatically builds and tests code when changes are committed.
• CD (Continuous Delivery/Deployment) – Automatically releases builds to environments.

16. How do you implement branch policies in Azure Repos?

• Require PRs for merges.
• Enforce build validation.
• Require code reviewers.

17. How do you handle rollback in Azure DevOps pipelines?

• Maintain previous release artifacts.
• Create rollback stages in pipeline.

18. Explain pipeline caching.
Store dependencies and files between runs to improve build time.

19. How do you connect Azure DevOps to Azure services securely?
Use Service Principal via Service Connection.

20. How do you integrate automated testing in pipelines?
Add dotnet test, pytest, or Selenium test stages with results publishing.

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3️⃣ Scenario-Based Questions

These test problem-solving.

21. You need to deploy infrastructure and code together — how?

• Use Azure Pipelines to first run Terraform/Bicep/ARM templates, then deploy app code in next stages.

22. You need to deploy the same code to Dev, QA, and Prod with approvals — how?

• Create multi-stage YAML pipeline with environments and approval gates.

23. Your build is failing due to missing dependencies — what do you do?

• Check agent logs.
• Add pipeline caching or install dependencies in pre-build step.

24. Your team wants to track work items with code commits — how?

• Link commits to work items using #ID in commit messages.

25. You need to run different pipeline steps for feature branches and main branch — how?

• Use YAML conditions:

condition: eq(variables['Build.SourceBranch'], 'refs/heads/main')

26. You need to deploy Databricks notebooks from Dev to Prod — how?

• Store notebooks in Git repo.
• Use databricks-cli in Azure Pipelines to import/export between environments.

27. You have secrets in Azure Key Vault — how do you use them in pipelines?

• Link Key Vault to pipeline variable group.
• Reference with $(secretName).

28. You want to auto-deploy only when tests pass — how?

• Add a build validation policy to the branch.
• Use pipeline stages with dependency on successful test jobs.

29. You need zero-downtime deployment for a web app — how?

• Use deployment slots in Azure App Service.
• Deploy to staging, then swap.

30. You need to run the same pipeline for multiple microservices — how?

• Use pipeline templates in YAML.
• Pass parameters for service-specific configs.

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4️⃣ Bonus Technical Questions

These can impress interviewers.

31. What is Azure DevOps CLI?
Command-line tool to manage Azure DevOps resources.

32. How do you manage large secrets?
Store in Key Vault, never in repo or pipeline variables.

33. How do you deploy a container app using Azure DevOps?

• Build Docker image in pipeline.
• Push to Azure Container Registry.
• Deploy to Azure Kubernetes Service (AKS).

34. How do you ensure code quality in Azure DevOps?

• Integrate SonarQube or CodeQL in build pipeline.

35. How do you handle multiple repos in the same pipeline?

• Use resources.repositories in YAML.

36. How do you use approvals and checks in pipelines?

• Configure on environments or stages in YAML.

37. How do you integrate with Jira or ServiceNow?

• Use marketplace extensions or APIs.

38. How do you deploy Terraform from Azure DevOps?

• Use Terraform task in pipeline with AzureRM backend.

39. How do you set up pull request validation?

• Create a build pipeline with PR trigger.

40. How do you do blue-green deployment in Azure DevOps?

• Use separate prod environments and traffic routing.

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