AZ-400 Development Processes & Continuous Integration 3

Question 1

Your Azure Pipeline YAML uses a self-hosted agent pool. The build fails with 'no agents available.' What is the most likely cause?

Accepted Answer

All agents in the pool are busy or offline

Answer

When no agents are available in a self-hosted pool, the pipeline queues until an agent comes online or becomes free.

Question 2

What does the 'checkout: self' step do in an Azure Pipelines YAML job?

Accepted Answer

Checks out the repository that contains the pipeline YAML file

Answer

'checkout: self' clones the repository that contains the currently running pipeline YAML, which is the default behavior for most jobs.

Question 3

A team wants to prevent secrets from being printed in pipeline logs. Which Azure DevOps feature automatically masks secret values in log output?

Accepted Answer

Pipeline variables marked as 'secret'

Answer

Variables marked as secret in Azure Pipelines are automatically masked in log output, preventing accidental exposure.

Question 4

Which branching strategy minimizes merge conflicts and supports continuous integration most effectively?

Accepted Answer

Trunk-based development with short-lived branches

Answer

Trunk-based development with short-lived branches keeps integration frequent and minimizes divergence, which is the foundation of effective CI.

Question 5

You want to publish test results from a pytest run so they appear in the Azure Pipelines test reporting UI. Which task should you use?

Accepted Answer

PublishTestResults

Answer

The PublishTestResults task uploads JUnit, NUnit, or other format test result files so they are displayed in the pipeline's Tests tab.

AZ-400 Practice Test