A company uses Azure App Configuration Feature Manager. They want to roll out a new feature to 10% of users, but they also need to ensure that a specific group of internal testers always gets the feature enabled. The feature must be disabled instantly if a problem is detected. What should they configure?

Use a rollout filter with a 10% percentage and no other filters

Use a time window filter that enables the feature for everyone after a certain date

Use a single percentage filter set to 10% and rely on the internal testers being in the 10% by chance

Use a percentage filter with a 10% rollout and an override filter for the internal testers group

A build pipeline produces multiple artifacts that must be deployed in a specific order because some services depend on others. What is the most reliable way to enforce this ordering in Azure Pipelines?

Place all deployment tasks in a single job and rely on the order they appear in the YAML file.

Use a single stage with multiple jobs that run in parallel.

Use multiple pipelines and rely on the order they are triggered manually.

Define separate stages in a pipeline and use the `dependsOn` keyword to specify dependencies between them.

A development team wants to enable a new checkout feature for a small percentage of users without deploying a new build. They plan to use Azure App Configuration Feature Manager. What should they do to implement this?

Add a feature flag in App Configuration with a percentage filter and reference it in the application code

Modify the application code to hard-code the feature as enabled

Create a new build with the feature enabled and deploy it to a staging slot

Use Azure DevOps variable groups to toggle the feature

A company runs a web app on Azure App Service with two instances. They want to deploy a new release with zero downtime. They are using deployment slots. What is the correct process?

Deploy directly to the production slot and rely on the two instances to handle the deployment without downtime.

Stop the production slot, deploy to it, and then start it again.

Use the Azure CLI to swap the production slot with the staging slot without warming up the staging slot.

Deploy to the staging slot, warm it up, and then swap the staging slot with the production slot.

A release pipeline deploys a web app and runs database migrations using a SQL script. The team wants to ensure that if the application deployment fails after the database migration has run, the pipeline does not retry the migration in a way that causes errors. What should they do?

Configure the pipeline to run the migration script only once by using a flag in a variable group that is set after the migration completes.

Use a deployment group and run the migration script on the database server, then deploy the app only if the migration succeeds.

Use a SQL task that runs the migration script with 'IF NOT EXISTS' checks to make it idempotent.

Separate the database migration into its own stage and use a post-deployment gate to check the application health before proceeding.

Microsoft Certified:DevOps Engineer Expert

Domain 3Objective 4

Design and Implement Deployments AZ-400 Practice Questions (Page 2)

Part of the Design and implement build and release pipelines domain, which makes up ~41% of our current practice bank. Microsoft does not publish an official question count, but from its 140-minute exam (~55–95 total, ~23–39 in this domain), expect 4–7 from this objective — we provide 19 practice questions to prepare you well beyond it. (estimate)

19questions here

4free pages

8concepts

Questions 6–10

6expert · hard
A company uses Azure App Configuration Feature Manager. They want to roll out a new feature to 10% of users, but they also need to ensure that a specific group of internal testers always gets the feature enabled. The feature must be disabled instantly if a problem is detected. What should they configure?
Select an answer first
7foundation · easy
A build pipeline produces multiple artifacts that must be deployed in a specific order because some services depend on others. What is the most reliable way to enforce this ordering in Azure Pipelines?
Select an answer first
8application · medium
A development team wants to enable a new checkout feature for a small percentage of users without deploying a new build. They plan to use Azure App Configuration Feature Manager. What should they do to implement this?
Select an answer first
9application · medium
A company runs a web app on Azure App Service with two instances. They want to deploy a new release with zero downtime. They are using deployment slots. What is the correct process?
Select an answer first
10application · medium
A release pipeline deploys a web app and runs database migrations using a SQL script. The team wants to ensure that if the application deployment fails after the database migration has run, the pipeline does not retry the migration in a way that causes errors. What should they do?
Select an answer first

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