This AZ-400 practice question tests your understanding of design and implement a devops infrastructure. 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 company uses Azure DevOps to manage code. They want to enforce that all changes to the main branch must go through a pull request with at least two reviewers. What should they configure?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
Branch policy on the main branch
Branch policies can require a minimum number of reviewers.
Add a tag to the main branch
Why wrong: Tags are for marking releases, not enforcing reviews.
Repository permissions
Why wrong: Permissions control who can push but not the review process.
Configure a service hook
Why wrong: Service hooks notify external systems but don't enforce branch policies.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Branch policy on the main branch
Branch policies in Azure DevOps allow you to enforce requirements on pull requests targeting a specific branch. By configuring a branch policy on the main branch, you can require a minimum number of reviewers (e.g., two) and mandate that all changes must go through a pull request. This ensures that no direct commits bypass the review process.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Branch policy on the main branch
Why this is correct
Branch policies can require a minimum number of reviewers.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Add a tag to the main branch
Why it's wrong here
Tags are for marking releases, not enforcing reviews.
Repository permissions
Why it's wrong here
Permissions control who can push but not the review process.
Configure a service hook
Why it's wrong here
Service hooks notify external systems but don't enforce branch policies.
Common exam traps
The trap here is that candidates may confuse repository permissions (which control access) with branch policies (which control workflow and quality gates), leading them to select Option C instead of the correct branch policy configuration.
Detailed technical explanation
Branch policies in Azure DevOps are implemented via the Git refs/pull/ namespace and the pull request merge strategy. When a branch policy is enabled, Azure DevOps blocks direct pushes to the branch and enforces the policy during pull request completion, using a combination of status checks and required reviewers. In a real-world scenario, this ensures compliance with the four-eyes principle for critical branches like main or release.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Design and implement a DevOps infrastructure — study guide chapter
Learn the concepts, then practise the questions
Design and implement a DevOps infrastructure practice questions
Targeted practice on this topic area only
All AZ-400 questions
913 questions across all exam domains
Microsoft Azure DevOps Engineer Expert AZ-400 study guide
Full concept coverage aligned to exam objectives
AZ-400 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise AZ-400 questions linked to Configure processes and communications.
Practise AZ-400 questions linked to Design and implement source control.
Practise AZ-400 questions linked to Design and implement build and release pipelines.
Practise AZ-400 questions linked to Develop a security and compliance plan.
Practise AZ-400 questions linked to Implement an instrumentation strategy.
Practise AZ-400 questions linked to Design and implement a DevOps infrastructure.
Practise AZ-400 questions linked to Design and implement a source control strategy.
Practise AZ-400 questions linked to AZ-400 fundamentals.
Practise AZ-400 questions linked to AZ-400 scenario.
Practise AZ-400 questions linked to AZ-400 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Design and implement a DevOps infrastructure — This question tests Design and implement a DevOps infrastructure — Read the scenario before looking for a memorised answer..
The correct answer is: Branch policy on the main branch — Branch policies in Azure DevOps allow you to enforce requirements on pull requests targeting a specific branch. By configuring a branch policy on the main branch, you can require a minimum number of reviewers (e.g., two) and mandate that all changes must go through a pull request. This ensures that no direct commits bypass the review process.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "least". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 11, 2026
This AZ-400 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-400 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.