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.
Your organization uses GitHub for source control. You need to implement a secure source control strategy that prevents secrets from being exposed and ensures code quality. Which THREE practices should you implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure branch protection rules requiring status checks to pass
Option A is correct because branch protection rules enforce required status checks (e.g., CI builds, code reviews) before merging, which prevents code that fails quality gates from entering protected branches. This directly supports code quality by ensuring only validated changes are merged.
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.
✓
Configure branch protection rules requiring status checks to pass
Why this is correct
Status checks enforce code quality gates.
Related concept
Read the scenario before looking for a memorised answer.
✗
Store secrets in a .env file committed to the repository
Why it's wrong here
Storing secrets in the repo is insecure.
✗
Require commit signing using GPG keys
Why it's wrong here
Commit signing verifies identity, not secrets or code quality.
✓
Enable GitHub secret scanning for the repository
Why this is correct
Secret scanning detects exposed secrets in code.
Related concept
Read the scenario before looking for a memorised answer.
✓
Use pre-commit hooks to scan for secrets before commits
Why this is correct
Pre-commit hooks can detect secrets before they reach the repo.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse commit signing (which ensures authenticity) with secret scanning or code quality enforcement, leading them to select option C instead of recognizing that it does not address the stated goals of preventing secret exposure or ensuring code quality.
Detailed technical explanation
How to think about this question
GitHub secret scanning automatically detects known patterns (e.g., AWS keys, GitHub tokens) in repository contents and alerts owners, while pre-commit hooks run client-side scripts (e.g., using tools like git-secrets or truffleHog) to block commits containing secrets before they reach the remote. Under the hood, branch protection rules use the GitHub API to enforce checks on pull requests, requiring status checks from CI systems like GitHub Actions to pass before merge.
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: Configure branch protection rules requiring status checks to pass — Option A is correct because branch protection rules enforce required status checks (e.g., CI builds, code reviews) before merging, which prevents code that fails quality gates from entering protected branches. This directly supports code quality by ensuring only validated changes are merged.
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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