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Design and implement a source control strategy →mediumMultiple ChoiceObjective-mapped

AZ-400 Practice Question: Design and implement a source control strategy

This AZ-400 practice question tests your understanding of design and implement a source control strategy. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.

Exhibit

{"isDisabled":false,"isLocked":false,"isFrozen":false,"branch":"refs/heads/main","settings":{"scope":[{"refName":"refs/heads/main","matchKind":"Exact","repositoryId":"e6d5f8a1-..."}],"isBlocking":true,"isDeleted":false,"isEnabled":true,"isCommentRequired":true,"isResetOnSourcePush":false,"allowDeletions":false,"allowForcePush":false,"blockLastPusherReview":true,"requireApprovalCount":2,"requireMandatoryReviewers":true,"requireNoMergeConflict":true,"requireSquashMerge":false,"requireTransitionToApproved":true,"requiredReviewerIds":["a1b2c3d4-..."],"buildDefinitionId":1234,"queueOnSourceUpdateOnly":false,"manualQueueOnly":false,"triggeredBuilds":[],"automaticallyLinkedWorkItems":false,"displayName":"Main branch policy"}}

Refer to the exhibit. You have a branch policy JSON for Azure Repos. Which statement about this policy is correct?

Question 1mediummultiple choice
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Exhibit

{"isDisabled":false,"isLocked":false,"isFrozen":false,"branch":"refs/heads/main","settings":{"scope":[{"refName":"refs/heads/main","matchKind":"Exact","repositoryId":"e6d5f8a1-..."}],"isBlocking":true,"isDeleted":false,"isEnabled":true,"isCommentRequired":true,"isResetOnSourcePush":false,"allowDeletions":false,"allowForcePush":false,"blockLastPusherReview":true,"requireApprovalCount":2,"requireMandatoryReviewers":true,"requireNoMergeConflict":true,"requireSquashMerge":false,"requireTransitionToApproved":true,"requiredReviewerIds":["a1b2c3d4-..."],"buildDefinitionId":1234,"queueOnSourceUpdateOnly":false,"manualQueueOnly":false,"triggeredBuilds":[],"automaticallyLinkedWorkItems":false,"displayName":"Main branch policy"}}

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

At least two reviewers must approve the pull request.

The branch policy JSON specifies `minimumApproverCount: 2`, which enforces that at least two distinct reviewers must approve the pull request before it can be completed. This is a standard Azure Repos branch policy setting that controls the required number of approvals, not the identity of the approvers or the merge strategy.

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.

  • ✗

    The last person who pushed can approve the pull request.

    Why it's wrong here

    blockLastPusherReview is true, so they cannot.

  • ✓

    At least two reviewers must approve the pull request.

    Why this is correct

    requireApprovalCount is 2.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    Pull requests to main are automatically squash-merged.

    Why it's wrong here

    requireSquashMerge is false.

  • ✗

    Approvals are reset when the source branch is updated.

    Why it's wrong here

    isResetOnSourcePush is false.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates assume the last person who pushed can always approve, but Azure Repos defaults to blocking that unless explicitly overridden, and the policy JSON shown does not include the override setting.

Detailed technical explanation

How to think about this question

The `minimumApproverCount` field in Azure Repos branch policy enforces a minimum number of unique approvers, but it does not consider whether the approver is the last pusher unless the 'Allow approvers to approve their own changes' policy is disabled. The `resetOnSourcePush` property, when set to `true`, invalidates existing approvals upon new commits to the source branch, which is a common requirement for strict CI/CD pipelines. In real-world scenarios, teams often combine `minimumApproverCount` with `resetOnSourcePush` to ensure code is re-reviewed after changes.

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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this AZ-400 question test?

Design and implement a source control strategy — This question tests Design and implement a source control strategy — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: At least two reviewers must approve the pull request. — The branch policy JSON specifies `minimumApproverCount: 2`, which enforces that at least two distinct reviewers must approve the pull request before it can be completed. This is a standard Azure Repos branch policy setting that controls the required number of approvals, not the identity of the approvers or the merge strategy.

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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Last reviewed: Jun 25, 2026

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