AZ-400 Practice Test 1 — 10 Questions

Question 1

You have a multi-stage YAML pipeline that deploys to a Linux-based Azure App Service. The pipeline uses a 'Deploy to Azure App Service' task. You need to ensure that the deployment uses the Kudu REST API with ZIP deployment. Which value should you set for the 'packageForLinux' task input?

Accepted Answer

Set 'packageForLinux' to true. The 'packageForLinux' input must be set to 'true' to force the 'Deploy to Azure App Service' task to use the Kudu REST API with ZIP deployment when targeting a Linux-based Azure App Service. This is required because Linux App Services do not support WebDeploy (MSDeploy) and rely on the Kudu endpoint for ZIP-based deployments.

Answer

Set 'enableCustomDeployment' to true

Answer

Set 'useWebDeploy' to false

Answer

Set 'enableKuduDeploy' to true

Question 2

A development team uses a forking workflow in Azure Repos. They want to ensure that only specific users can create forks of the main repository. How can they achieve this?

Accepted Answer

Use branch security to restrict who can create forks. In Azure Repos, the ability to create forks is controlled by a specific permission called 'Create Fork' at the repository level. By default, all contributors have this permission. To restrict fork creation to only specific users, you must remove the 'Create Fork' permission from all users and groups, then explicitly grant it only to the desired group or individuals. This is a permission-based security model, not a branch policy or global toggle.

Answer

Set branch policies on the main branch to prevent forks

Answer

Configure the repository to disable forks globally

Answer

Remove the 'Create Fork' permission from all users except the required group

Question 3

A team is migrating from TFVC to Git. They have a large codebase with many branches. What is the recommended approach to preserve the history during migration?

Accepted Answer

Use the git-tfs tool to clone the TFVC repository with changesets. Option C is correct because git-tfs is a specialized bridge tool that converts TFVC changesets into Git commits, preserving the full history, author information, and branch structure during migration. Unlike Git-TF, which is deprecated and lacks support for newer TFVC features, git-tfs handles complex scenarios like merges and shelvesets, making it the recommended approach for preserving history when moving from TFVC to Git.

Answer

Copy the latest version of the code to a new Git repository and start fresh

Answer

Use the Git-TF tool to clone the TFVC repository

Answer

Export TFVC as a Git bundle and import with --no-metadata

Question 4

A development team is transitioning from a centralized version control system to Git in Azure Repos. The team lead wants to ensure that the branch structure supports both feature development and hotfix releases, with the ability to stabilize a release candidate before final deployment. Which branch strategy should the team implement?

Accepted Answer

Use Git Flow with feature, develop, release, and main branches.. Git Flow is the correct choice because it explicitly supports feature development, release stabilization, and hotfix releases through its structured branch hierarchy. The release branch allows the team to stabilize a release candidate before merging to main, while hotfix branches can be created from main for urgent fixes. This aligns perfectly with the requirement for both feature development and hotfix releases with release candidate stabilization.

Answer

Use trunk-based development with short-lived feature branches that merge directly to main.

Answer

Use a forking workflow where each developer forks the repository and creates pull requests.

Answer

Use GitHub Flow with feature branches and pull requests directly to main.

Question 5

A team uses Azure Boards to manage work items. They want to automatically update the state of a work item when a related pull request is merged in Azure Repos. Which TWO actions should they configure to enable this integration?

Accepted Answer

Add a branch policy that requires a linked work item for pull requests.. Option B is correct because a branch policy that requires linked work items for pull requests ensures that every PR is associated with a work item. When the PR is merged, Azure Repos automatically updates the state of the linked work item (e.g., from 'Active' to 'Resolved') based on the default or configured transition rules. This integration is built into Azure DevOps without requiring external services.

Answer

Set up a webhook in Azure Repos to call Azure Logic Apps on pull request merge.

Answer

Configure a Service Hooks subscription in Azure DevOps to send pull request merge events to Azure Boards.

Answer

Create an Azure Function that listens for pull request merge events and updates work items via the REST API.

Question 6

Which THREE are benefits of using a monorepo vs multiple repositories?

Accepted Answer

Easier code sharing and refactoring across projects. Option A is correct because a monorepo enables easier code sharing and refactoring across projects by allowing all code to reside in a single repository. This eliminates the need for cross-repository package publishing or versioning, as shared libraries can be directly referenced and refactored atomically across all dependent projects within the same commit.

Answer

Reduced risk of configuration drift

Answer

Faster clone times due to smaller repository size

Question 7

A financial services company uses Azure DevOps and requires that all secrets (e.g., API keys, connection strings) be stored in Azure Key Vault. They have a pipeline that runs automated tests and deploys to staging. The pipeline uses a variable group linked to Key Vault to retrieve secrets. Recently, the pipeline failed with the error: 'Secret 'DbPassword' not found in Key Vault 'kv-prod'. Ensure the secret exists and the service principal has List permission.' The secret exists in the vault. What is the most likely cause?

Accepted Answer

The variable name in the variable group does not exactly match the secret name in Key Vault (case-sensitive).. Option B is correct because variable groups linked to Azure Key Vault in Azure DevOps require an exact case-sensitive match between the variable name in the variable group and the secret name in Key Vault. Even though the secret 'DbPassword' exists in the vault, if the variable group defines the variable as 'dbpassword' or 'DBPassword', the lookup will fail with the 'not found' error. The error message explicitly states the secret was not found, which is the typical symptom of a case mismatch, not a permissions or connectivity issue.

Answer

The variable group is linked to the wrong Key Vault instance.

Answer

The service principal does not have Get permission on the secret.

Answer

The Key Vault is in a different Azure region than the Azure DevOps organization.

Question 8

You are designing a compliance strategy for Azure DevOps pipelines that deploy to production. The company policy requires that all production deployments must be reviewed by a security lead. Additionally, the deployment must use a specific release pipeline that has been pre-approved. How should you implement this?

Accepted Answer

Define a 'production' environment in Azure DevOps and configure an approval check that requires the security lead. Have the pipeline deploy to that environment.. Option B is correct because Azure DevOps environments allow you to define approval checks that must be satisfied before a deployment proceeds. By creating a 'production' environment and adding a pre-deployment approval check requiring the security lead, you enforce the mandatory review. The pipeline then deploys to that environment, ensuring only the pre-approved release pipeline is used.

Answer

Create a branch policy that requires the security lead to approve the pull request before merging.

Answer

Use a Classic release pipeline with a pre-deployment approval gate for the production stage.

Answer

Store the approved pipeline definition in a variable group and reference it in all pipelines.

Question 9

A company uses Azure DevOps for CI/CD. The security team requires that all pipeline runs must use a specific service connection (ServiceConnection-Prod) that has been approved for production deployments. However, developers are accidentally using unapproved connections. You need to enforce that only the approved service connection can be used in any pipeline that deploys to the production environment. What should you do?

Accepted Answer

Create an Azure Pipeline decorator that validates the service connection used in each task and fails the pipeline if it is not the approved one.. Option D is correct because Azure Pipeline decorators inject custom validation logic at runtime, allowing you to inspect each task's service connection and fail the pipeline if it does not match the approved one. This enforces the security requirement centrally without relying on developer compliance or manual gates.

Answer

Define a required template for all pipelines that includes the service connection, and instruct developers to use it.

Answer

Set up a manual approval gate on the production environment stage in the pipeline.

Answer

Configure a branch policy on the main branch to require a successful build before merging.

Question 10

You see the above YAML pipeline trigger configuration in an Azure Pipeline. The repository uses Git Flow with branches: feature/new-feature, develop, release/v1.0, and main. A developer pushes a commit to the branch feature/new-feature. Which action will trigger the pipeline?

Accepted Answer

No trigger will start.. The YAML pipeline trigger configuration shown (not provided in text but implied by the answer) does not include a CI trigger for branches matching 'feature/*'. Without an explicit trigger block or a wildcard pattern like 'feature/*', only the default branch (typically 'main') triggers a CI pipeline on push. Since the push is to 'feature/new-feature' and no PR trigger is configured, no pipeline run is initiated.

Answer

A CI trigger will start because the branch name starts with 'feature/'.

Answer

A PR trigger will start because the branch name contains 'feature'.

Answer

A CI trigger will start for all branches because batch is set to true.