A team has a distributed system with multiple services. They want to run integration tests in the pipeline, but the services depend on external APIs that are not available in the test environment. They have recorded mock responses for those APIs. What should they do?

Run integration tests only in production.

Use a service virtualization tool to simulate the external APIs during integration tests.

Use unit tests that mock the external APIs.

Skip integration tests if the external APIs are unavailable.

A team uses Azure Pipelines to run tests for a C# application. They want to enforce a code coverage threshold of 70% for the overall codebase, but they also want to exclude generated code from the coverage calculation. What should they do?

Use a script that calculates coverage manually and fails if below 70%.

Use the built-in coverage task and set the threshold to 70% without excluding generated code.

Run tests without coverage and rely on code review to ensure quality.

Configure the coverage tool to exclude generated code and then use a script to check the coverage percentage.

What does code coverage measure?

The time it takes to run the tests

The number of bugs found in the code

The percentage of code that is executed by the test suite

The number of test cases written

A team has a large codebase with many unit tests. The tests take a long time to run, and the team wants to reduce the feedback time in the pipeline. They also want to maintain code coverage thresholds. What is the best strategy?

Run only a subset of tests that are most likely to fail.

Move the unit tests to a release gate.

Increase the coverage threshold to force more tests to run.

Run the unit tests in parallel across multiple agents and publish combined coverage.

A pipeline has multiple test tasks that produce test result files. The team wants to see a unified test report in the pipeline and have the pipeline fail if any test fails. What should be configured?

Only publish the results from the last test task.

Configure the pipeline to continue on error and ignore failures.

Use a release gate to check the test results.

Publish test results from each task and set the pipeline to fail on test failure.

Microsoft Certified:DevOps Engineer Expert

Domain 3Objective 2

Design and Implement a Testing Strategy for Pipelines AZ-400 Practice Questions (Page 3)

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 52 practice questions to prepare you well beyond it. (estimate)

52questions here

11free pages

13concepts

13 Concepts in This Objective

Quality Gates Design
Release Gates Implementation
Security Gates Design
Governance Gates Implementation
Local Testing Strategy
Unit Testing Strategy
Integration Testing Strategy
Load Testing Strategy
Pipeline Test Implementation
Test Task Configuration
Test Agent Configuration
Test Results Integration
Code Coverage Analysis

Questions 11–15

11expert · hard
A team has a distributed system with multiple services. They want to run integration tests in the pipeline, but the services depend on external APIs that are not available in the test environment. They have recorded mock responses for those APIs. What should they do?
Select an answer first
12expert · hard
A team uses Azure Pipelines to run tests for a C# application. They want to enforce a code coverage threshold of 70% for the overall codebase, but they also want to exclude generated code from the coverage calculation. What should they do?
Select an answer first
13foundation · easy
What does code coverage measure?
Select an answer first
14expert · hard
A team has a large codebase with many unit tests. The tests take a long time to run, and the team wants to reduce the feedback time in the pipeline. They also want to maintain code coverage thresholds. What is the best strategy?
Select an answer first
15application · medium
A pipeline has multiple test tasks that produce test result files. The team wants to see a unified test report in the pipeline and have the pipeline fail if any test fails. What should be configured?
Select an answer first

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