Infrastructure as Code · Complete Question Bank

All Infrastructure as Code Interview Questions

Practice the complete collection of Infrastructure as Code interview questions including theory, coding, MCQs and real interview problems.

Total Questions: 118Topics: 46Complete interview preparation

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All Infrastructure as Code Interview Questions (118)

Scroll through every important Infrastructure as Code question asked in real interviews. Includes MCQs, subjective questions, and coding prompts.

1. What best describes Infrastructure as Code?

Difficulty: EasyType: MCQTopic: IaC Basics

Manually configuring infrastructure through dashboards
Automating infrastructure provisioning using code or scripts
Outsourcing infrastructure setup to vendors
Running applications without servers

Infrastructure as Code, or IaC, is a DevOps practice that automates infrastructure provisioning through machine-readable configuration files or code. Instead of manual setup, engineers define and manage environments programmatically, ensuring consistency, scalability, and reproducibility across all deployments.

Correct Answer: Automating infrastructure provisioning using code or scripts

2. Which statement correctly differentiates declarative and imperative approaches in IaC?

Difficulty: MediumType: MCQTopic: IaC Basics

Declarative defines what final state should be, imperative defines how to reach it

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All Infrastructure as Code Interview Questions

Overview

1. What best describes Infrastructure as Code?

2. Which statement correctly differentiates declarative and imperative approaches in IaC?

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3. Why is idempotency important in Infrastructure as Code?

4. What does immutability mean in Infrastructure as Code?

5. Why is Git commonly used with Infrastructure as Code?

6. What is configuration drift in the context of IaC?

7. What is GitOps in relation to Infrastructure as Code?

8. Which of the following is NOT an Infrastructure as Code tool?

9. Explain the main benefits of using Infrastructure as Code in a DevOps environment.

10. What are the key principles that guide Infrastructure as Code design?

11. Why is state management critical in IaC tools like Terraform, and what problems can occur if it is mishandled?

12. How can teams detect and fix configuration drift in Infrastructure as Code environments?

13. Describe a real-world scenario where Infrastructure as Code improved operational efficiency or reliability.

14. What is Terraform primarily used for in DevOps?

15. In Terraform, what is a provider?

16. In Terraform, what does a 'resource' block represent?

17. What is the purpose of Terraform state files?

18. What does the command 'terraform init' do?

19. What does the command 'terraform plan' display?

20. What happens when you run 'terraform apply'?

21. What is the use of variables in Terraform configuration?

22. Explain the role of the 'terraform.tfstate' file and why it must be handled carefully.

23. What is a remote backend in Terraform and what are its advantages?

24. What are Terraform modules and how do they promote reusability?

25. Describe how Terraform handles resource lifecycle management and dependency ordering.

26. Explain a typical Terraform workflow in a team environment from code writing to deployment.

27. Why are Terraform modules used in large-scale infrastructure projects?

28. What is the primary advantage of using remote backends in Terraform?

29. What is the role of Terraform workspaces?

30. What are Terraform provisioners used for?

31. Which of the following lifecycle arguments can prevent accidental deletion of resources?

32. What does the 'depends_on' argument do in Terraform?

33. What does the 'terraform import' command do?

34. How does Terraform detect drift between configuration and actual infrastructure?

35. Explain Terraform state locking and why it is important in team environments.

36. How should sensitive data such as passwords or keys be handled securely in Terraform?

37. What advantages does Terraform Cloud provide for enterprise IaC workflows?

38. Describe how 'Policy as Code' integrates with Terraform in enterprise governance.

39. Explain how you would design a multi-environment setup in Terraform for dev, staging, and production.

40. What is Ansible primarily used for in DevOps?

41. Why is Ansible called an 'agentless' automation tool?

42. In Ansible, what is a playbook?

43. What is the purpose of the Ansible inventory file?

44. What does idempotency mean in Ansible?

45. What is the purpose of roles in Ansible?

46. In Ansible, what are handlers used for?

47. What is Ansible Galaxy used for?

48. Explain the role of templates and Jinja2 in Ansible.

49. What is Ansible Vault, and why is it important?

50. How can you handle errors and failed tasks in Ansible playbooks?

51. Describe how dynamic inventory works in Ansible and where it is used.

52. Explain a real-world use case where Ansible improved DevOps automation efficiency.

53. What is AWS CloudFormation primarily used for?

54. In AWS CloudFormation, what is a 'template'?

55. What is an AWS CloudFormation stack?

56. What is the purpose of 'parameters' in CloudFormation templates?

57. What is the role of the 'Outputs' section in CloudFormation?

58. What does a CloudFormation StackSet allow you to do?

59. How does Pulumi differ from Terraform or CloudFormation?

60. Which statement correctly describes Chef and Puppet?

61. Compare Terraform and CloudFormation in terms of platform support, language, and flexibility.

62. What is drift detection in CloudFormation and why is it important?

63. How do Chef and Puppet differ in their approach to configuration management?

64. Explain the benefits and challenges of using Pulumi for Infrastructure as Code.

65. In large enterprises, how can multiple IaC tools like Terraform, CloudFormation, and Ansible coexist effectively?

66. How does Infrastructure as Code integrate with CI/CD pipelines?

67. What is a common use of Jenkins in an IaC workflow?

68. What is the role of GitHub Actions in IaC pipelines?

69. How does GitLab CI/CD improve IaC automation?

70. Why is Terraform plan validation important in CI/CD pipelines?

71. How should sensitive secrets be handled in CI/CD pipelines for IaC?

72. What is 'policy as code' in CI/CD IaC pipelines?

73. Which step in a CI/CD pipeline typically applies infrastructure changes?

74. Describe a typical CI/CD pipeline flow for deploying infrastructure using Terraform.

75. How can rollback strategies be implemented for IaC pipelines?

76. What types of testing are commonly used in CI/CD pipelines for Infrastructure as Code?

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