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. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
You work for a multinational company that uses Azure Repos. The compliance team requires that all code changes include a work item reference in the commit message. What is the most effective way to enforce this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set a branch policy that requires a linked work item for pull requests
Option C is correct because a branch policy in Azure Repos that requires linked work items for pull requests enforces the compliance requirement at the server side, ensuring that every pull request merge includes a work item reference. This policy is enforced before the merge completes, making it a reliable and auditable method that cannot be bypassed by individual developers. It directly integrates with Azure Boards to validate the link, providing a centralized enforcement mechanism.
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.
✗
Create a script in the build pipeline that checks the commit message
Why it's wrong here
The script can be bypassed if the build is skipped.
✗
Configure a client-side commit hook that validates the commit message
Why it's wrong here
Client-side hooks can be disabled by developers.
✓
Set a branch policy that requires a linked work item for pull requests
Why this is correct
Branch policies enforce the requirement server-side before merge.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use a custom build task to automatically add the work item ID to the commit message
Why it's wrong here
Automatically adding IDs doesn't enforce that developers include them.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse client-side hooks (Option B) with server-side enforcement, not realizing that client-side hooks are optional and can be easily bypassed, whereas branch policies in Azure Repos provide mandatory, centralized enforcement that cannot be overridden by individual developers.
Detailed technical explanation
How to think about this question
Azure Repos branch policies are enforced at the server level via the Git reference update (refs/for/ or push) process, using the Azure DevOps REST API to validate conditions like linked work items before the merge commit is created. The policy checks that the pull request has at least one work item linked in Azure Boards, and if not, the merge is blocked, providing a tamper-proof audit trail. This approach leverages the built-in integration between Azure Repos and Azure Boards, ensuring compliance without requiring custom scripts or client-side configurations.
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 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: Set a branch policy that requires a linked work item for pull requests — Option C is correct because a branch policy in Azure Repos that requires linked work items for pull requests enforces the compliance requirement at the server side, ensuring that every pull request merge includes a work item reference. This policy is enforced before the merge completes, making it a reliable and auditable method that cannot be bypassed by individual developers. It directly integrates with Azure Boards to validate the link, providing a centralized enforcement mechanism.
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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