Top 10 Common DevOps/SRE Interview Questions and Answers on Terraform Best Practices

1. How Can You Manage Terraform State Efficiently?

Use remote backends, such as S3 or GCS, to store the Terraform state file. This enables collaboration and ensures state consistency when working in teams. Lock the state using DynamoDB or GCS to prevent simultaneous state modifications.

Example:

backend "s3" {
  bucket = "my-terraform-state"
  key    = "path/to/my/key"
  region = "us-west-2"
  dynamodb_table = "terraform-lock"
}

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2. Why Should You Use Version Control with Terraform?

Version control helps track changes to your Terraform configurations, allowing you to roll back to previous versions if necessary. Use Git repositories to manage your .tf files and follow a branch strategy to handle updates.

Example:

• Use git for tracking infrastructure changes

git commit -m "Updated production environment"

3. How Can You Modularize Terraform Configurations?

Breaking Terraform configurations into reusable modules ensures better code organization, reduces duplication, and simplifies updates.