AZ-400 Infrastructure as Code 3

Question 1

In Terraform, what is a `data` source used for?

Accepted Answer

Reading information from existing infrastructure not managed by the current config

Answer

Data sources allow Terraform to fetch read-only information from existing resources or external systems without managing those resources.

Question 2

What is the recommended approach when an Azure ARM template deployment fails midway through a resource group deployment?

Accepted Answer

Roll back using the Azure CLI `az deployment group rollback` command

Answer

`az deployment group rollback` rolls back a resource group to the last successful deployment, restoring the previous known-good state.

Question 3

Which tool is specifically designed to test Azure Bicep and ARM templates for compliance with organizational policies before deployment?

Accepted Answer

ARM Template Test Toolkit (arm-ttk)

Answer

The ARM Template Test Toolkit (arm-ttk) is a PowerShell-based testing framework that validates ARM and Bicep templates against best-practice rules.

Question 4

In a Terraform remote backend configuration using Azure Storage, what is the purpose of the `key` argument?

Accepted Answer

The blob name used to store the Terraform state file

Answer

The `key` argument specifies the blob name (path) within the Azure Storage container where the `.tfstate` file will be stored.

Question 5

When using Azure Bicep modules, what file path convention makes a module reusable across multiple Bicep files in the same project?

Accepted Answer

Using relative file paths such as `./modules/storage.bicep`

Answer

Relative file paths like `./modules/storage.bicep` are the simplest way to reference local Bicep modules within the same repository.

AZ-400 Practice Test