Top 10 Infrastructure as Code Interview Questions You Need to Know

Infrastructure as Code (IaC) is revolutionizing how teams manage and provision IT infrastructure. In this article, we’ll go over the top 10 IaC interview questions you need to know to excel in your next interview.

1. What is Infrastructure as Code (IaC)?

Infrastructure as Code (IaC) allows you to provision and manage infrastructure using code. It makes infrastructure management scalable, consistent, and repeatable. Tools like Terraform and AWS CloudFormation are widely used in IaC practices.

2. How does IaC differ from traditional infrastructure management?

IaC automates the provisioning process, whereas traditional infrastructure management is often manual. IaC ensures consistency and reduces human error.

3. What are the benefits of Infrastructure as Code?

The main benefits are scalability, consistency, automation, and the ability to version control infrastructure configurations. These features enhance productivity and reliability.

4. Can you explain how version control is used in IaC?

In IaC, code files can be versioned and tracked using version control systems like Git. This allows teams to collaborate, revert changes, and manage infrastructure evolution.

5. What are some popular IaC tools?

Some of the popular tools include Terraform, AWS CloudFormation, Ansible, and Puppet.

6. What is idempotence in IaC?

Idempotence ensures that applying the same IaC configuration multiple times results in the same state without unintended changes, making it predictable and reliable.

7. How does IaC fit into the DevOps pipeline?

IaC integrates seamlessly with CI/CD pipelines to automate the process of deploying infrastructure as part of the overall development lifecycle.

8. What is Terraform and why is it popular?

Terraform is an open-source IaC tool that allows teams to define and provision infrastructure using a declarative language. Its popularity stems from its cloud-agnostic nature and scalability.

9. What are Terraform modules and how are they used?

Terraform modules are reusable configurations that simplify the creation of complex infrastructure setups, allowing teams to manage them efficiently.

10. How do you test Infrastructure as Code?

Testing IaC can involve unit testing, integration testing, and functional testing to ensure that the code works as expected before it is deployed.