AZ-400 Design and implement source control Practice Question
This AZ-400 practice question tests your understanding of design and implement source control. 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
Azure DevOps Git repository configuration:
Branch policies:
- Branch: main
Required reviewers: 2
Minimum number of reviewers: 1
Reset code reviewer votes when new changes are pushed: true
Automatically include code reviewers: ["user1@contoso.com", "user2@contoso.com"]
Refer to the exhibit. A developer pushes a new commit to an existing pull request targeting the main branch. What is the effect on the pull request?
Exhibit
Azure DevOps Git repository configuration:
Branch policies:
- Branch: main
Required reviewers: 2
Minimum number of reviewers: 1
Reset code reviewer votes when new changes are pushed: true
Automatically include code reviewers: ["user1@contoso.com", "user2@contoso.com"]
A
The pull request is automatically merged.
Why wrong: No auto-merge policy is configured.
B
The existing approvals remain valid, and no re-review is needed.
Why wrong: The reset policy explicitly invalidates previous votes.
C
All existing approvals are revoked, and the pull request must be re-approved.
The reset policy causes votes to be cleared, requiring new approvals.
D
The new commit is rejected because it was pushed without a code review.
Why wrong: Commits can be pushed; only approval is reset.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
All existing approvals are revoked, and the pull request must be re-approved.
The policy 'Reset code reviewer votes when new changes are pushed' is set to true. Therefore, when a new commit is pushed, all previous reviewer votes are reset. The required number of reviewers is 2, but minimum is 1, so at least one reviewer must approve again.
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 pull request is automatically merged.
Why it's wrong here
No auto-merge policy is configured.
✗
The existing approvals remain valid, and no re-review is needed.
Why it's wrong here
The reset policy explicitly invalidates previous votes.
✓
All existing approvals are revoked, and the pull request must be re-approved.
Why this is correct
The reset policy causes votes to be cleared, requiring new approvals.
Related concept
Read the scenario before looking for a memorised answer.
✗
The new commit is rejected because it was pushed without a code review.
Why it's wrong here
Commits can be pushed; only approval is reset.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
Identify which AZ-400 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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: All existing approvals are revoked, and the pull request must be re-approved. — The policy 'Reset code reviewer votes when new changes are pushed' is set to true. Therefore, when a new commit is pushed, all previous reviewer votes are reset. The required number of reviewers is 2, but minimum is 1, so at least one reviewer must approve again.
What should I do if I get this AZ-400 question wrong?
Identify which AZ-400 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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