This AZ-400 practice question tests your understanding of design and implement build and release pipelines. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Network Topology
Refer to the exhibit. A build pipeline produces the above logs. Which change would resolve the build failure?
Network Topology
A
Change the build configuration from Release to Debug.
Why wrong: The compilation error is independent of configuration; changing it won't fix the missing method.
B
Add a definition for 'MyMethod' in the 'MyClass' class.
The error indicates that 'MyMethod' is missing from 'MyClass'. Adding the method definition resolves the compilation error.
C
Remove the '--no-build' flag from the test step.
Why wrong: Removing '--no-build' would cause the test step to attempt a build, but the build step already failed, so it wouldn't help.
D
Add the '--no-restore' flag to the build step.
Why wrong: The error is a compilation error, not a restore issue.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add a definition for 'MyMethod' in the 'MyClass' class.
The build failure is caused by a missing method definition. The logs indicate that the test step is attempting to invoke 'MyMethod' on an instance of 'MyClass', but the compiler cannot find it. Adding the missing method to the class resolves the compilation error, which is the root cause of the pipeline failure.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Change the build configuration from Release to Debug.
Why it's wrong here
The compilation error is independent of configuration; changing it won't fix the missing method.
✓
Add a definition for 'MyMethod' in the 'MyClass' class.
Why this is correct
The error indicates that 'MyMethod' is missing from 'MyClass'. Adding the method definition resolves the compilation error.
Related concept
Read the scenario before looking for a memorised answer.
✗
Remove the '--no-build' flag from the test step.
Why it's wrong here
Removing '--no-build' would cause the test step to attempt a build, but the build step already failed, so it wouldn't help.
✗
Add the '--no-restore' flag to the build step.
Why it's wrong here
The error is a compilation error, not a restore issue.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may focus on build flags like '--no-build' or configuration settings, overlooking the actual compilation error message that clearly indicates a missing method definition.
Detailed technical explanation
How to think about this question
In .NET build pipelines, the 'dotnet test' command with '--no-build' skips the build step and uses the previously compiled assemblies. If the test project references a method that does not exist in the compiled code, the test host fails with a MissingMethodException or a compilation error if the test project itself is not pre-built. The '--no-restore' flag similarly skips package restore, which can lead to missing assembly references. Properly defining all methods used in test code is essential for successful execution.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Visual reference
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-400 question in full detail.
Design and implement build and release pipelines — This question tests Design and implement build and release pipelines — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add a definition for 'MyMethod' in the 'MyClass' class. — The build failure is caused by a missing method definition. The logs indicate that the test step is attempting to invoke 'MyMethod' on an instance of 'MyClass', but the compiler cannot find it. Adding the missing method to the class resolves the compilation error, which is the root cause of the pipeline failure.
What should I do if I get this AZ-400 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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