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. 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.
Exhibit
Refer to the exhibit.
```yaml
# azure-pipelines.yml
trigger:
branches:
include:
- main
- release/*
pr:
branches:
include:
- main
```
Your Azure Pipeline is configured as shown in the exhibit. A developer pushes a commit to a feature branch named 'feature/new-login' and creates a pull request targeting the main branch. Which pipeline runs will be triggered?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Only a PR build
The pipeline is configured with a PR trigger that activates on pull requests targeting the main branch. When a developer pushes a commit to 'feature/new-login' and creates a PR to main, only the PR build is triggered. The CI trigger is not configured for the feature branch (only for main), so no CI build runs on the feature branch itself.
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.
✗
No pipeline runs
Why it's wrong here
PR build runs.
✓
Only a PR build
Why this is correct
PR trigger matches main branch.
Related concept
Read the scenario before looking for a memorised answer.
✗
Only a CI build on the feature branch
Why it's wrong here
PR build is triggered.
✗
Both a CI build on the feature branch and a PR build
Why it's wrong here
CI is not triggered for feature branches.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume a push to a feature branch automatically triggers a CI build, but the CI trigger's branch filter must explicitly include the branch; otherwise, only the PR trigger (if configured) will fire.
Detailed technical explanation
How to think about this question
Azure Pipelines PR triggers evaluate the source branch of the pull request and run the pipeline against the merge commit (the result of merging the source into target). CI triggers, on the other hand, run on pushes to specified branches. In this configuration, the CI trigger's 'include' branch filter is set to 'main', so pushes to 'feature/new-login' do not trigger a CI build. The PR trigger is independent and fires for any PR targeting main, regardless of the source branch.
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: Only a PR build — The pipeline is configured with a PR trigger that activates on pull requests targeting the main branch. When a developer pushes a commit to 'feature/new-login' and creates a PR to main, only the PR build is triggered. The CI trigger is not configured for the feature branch (only for main), so no CI build runs on the feature branch itself.
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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