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.
Your company has multiple teams working on a monorepo in Azure Repos. You need to enforce that changes to the /src/api folder require approval from the API team, while changes to /src/web require approval from the Web team. Which branch policy feature should you use?
Require a minimum number of reviewers
Why wrong: This applies to the entire branch, not specific paths.
Automatically include code reviewers
Why wrong: This adds reviewers but does not enforce mandatory approval.
Path filters in branch policy
Path filters allow scoping policy to specific file paths.
Use separate repositories for each team
Why wrong: The requirement is to use a monorepo, not separate repos.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Path filters in branch policy
Path filters in branch policy allow you to define conditions that trigger specific policy requirements based on the files changed in a pull request. By configuring a path filter for /src/api, you can require approval from the API team only when files in that folder are modified, and a separate path filter for /src/web can require approval from the Web team. This ensures that each team's approval is enforced only for their respective code areas within the monorepo.
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.
Require a minimum number of reviewers
Why it's wrong here
This applies to the entire branch, not specific paths.
Automatically include code reviewers
Why it's wrong here
This adds reviewers but does not enforce mandatory approval.
Path filters in branch policy
Why this is correct
Path filters allow scoping policy to specific file paths.
Related concept
Read the scenario before looking for a memorised answer.
Use separate repositories for each team
Why it's wrong here
The requirement is to use a monorepo, not separate repos.
Common exam traps
The trap here is that candidates often confuse 'automatically include code reviewers' (which just adds reviewers to all PRs) with the ability to conditionally enforce approval based on file paths, leading them to choose option B instead of the correct path filter feature.
Detailed technical explanation
Path filters in Azure Repos branch policies are evaluated against the list of changed files in a pull request; if any file matches the filter pattern, the associated policy (e.g., required reviewers) is activated. The filter uses glob-style patterns, so '/src/api/**' matches all files under that folder. This feature is particularly useful in large monorepos where different teams own distinct directories, as it avoids the need for separate repositories or manual policy enforcement.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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FAQ
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..
The correct answer is: Path filters in branch policy — Path filters in branch policy allow you to define conditions that trigger specific policy requirements based on the files changed in a pull request. By configuring a path filter for /src/api, you can require approval from the API team only when files in that folder are modified, and a separate path filter for /src/web can require approval from the Web team. This ensures that each team's approval is enforced only for their respective code areas within the monorepo.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
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