AZ-400 Design and implement source control Practice Question
This AZ-400 practice question tests your understanding of design and implement source control. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A development team uses Git for source control. They want to ensure that all code changes are reviewed before merging into the main branch. Which branch policy should they configure in Azure Repos?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure a branch policy that requires a minimum number of reviewers and resolves all comments.
Option A is correct because Azure Repos branch policies allow you to enforce that pull requests require a minimum number of reviewers and that all comments are resolved before merging. This directly ensures that all code changes are reviewed and any feedback is addressed, meeting the team's requirement for mandatory code review before merging into the main branch.
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.
✓
Configure a branch policy that requires a minimum number of reviewers and resolves all comments.
Why this is correct
This enforces peer review before merge.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure a branch policy that requires commit messages to follow a specific pattern.
Why it's wrong here
This does not enforce review.
✗
Configure a branch policy that requires a successful build.
Why it's wrong here
This validates build quality but not code review.
✗
Configure a branch policy that requires linked work items.
Why it's wrong here
This ensures traceability but not review.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse 'code review' with other quality gates like build validation or work item linking, but the question explicitly asks for a policy that ensures all changes are reviewed before merging, which is directly addressed only by reviewer and comment resolution policies.
Detailed technical explanation
How to think about this question
Azure Repos branch policies are enforced via the pull request (PR) pipeline, where policies like 'Minimum number of reviewers' and 'Comment resolution' are evaluated before the PR can be completed. Under the hood, Azure DevOps uses a policy evaluation engine that blocks the 'Complete' button until all policy requirements are met, and it integrates with the Git ref update mechanism to prevent direct pushes to the protected branch. In a real-world scenario, combining this policy with a build validation policy ensures both code review and CI checks are passed, but the question specifically targets the review requirement.
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.
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 source control — This question tests Design and implement source control — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure a branch policy that requires a minimum number of reviewers and resolves all comments. — Option A is correct because Azure Repos branch policies allow you to enforce that pull requests require a minimum number of reviewers and that all comments are resolved before merging. This directly ensures that all code changes are reviewed and any feedback is addressed, meeting the team's requirement for mandatory code review before merging into the main branch.
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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