DOP-C02 CodeCommit pre-receive hook GPG Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. 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 AWS CodeCommit as a source repository and wants to enforce that all commits are signed using GPG keys. The DevOps team configures a pre-receive hook in CodeCommit to validate commit signatures. However, the hook rejects all commits even when valid GPG signatures are present. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
CodeCommit does not support pre-receive hooks.
AWS CodeCommit does not support pre-receive hooks. Pre-receive hooks are a feature of self-managed Git repositories (e.g., GitHub Enterprise, GitLab, or on-premises Git servers) that run on the server before accepting a push. CodeCommit uses IAM policies and repository-level settings (such as requiring signed commits via the 'git push --signed' flag) to enforce commit signing, not server-side hooks. Therefore, any attempt to configure a pre-receive hook in CodeCommit will fail, causing all commits to be rejected.
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.
✗
The GPG key is not registered with the IAM user's profile.
Why it's wrong here
While GPG key must be associated with the IAM user, the issue is that CodeCommit doesn't support pre-receive hooks.
✗
The hook script has a syntax error.
Why it's wrong here
Even if the script is correct, CodeCommit does not execute pre-receive hooks.
✗
The repository is not configured to require signed commits.
Why it's wrong here
CodeCommit does not have a built-in setting to require signed commits; the hook is the intended mechanism, but it's not supported.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The DOP-C02 exam frequently reuses these exact scenarios with slightly different constraints.
✓CodeCommit does not support pre-receive hooks.Correct answer▾✗The GPG key is not registered with the IAM user's profile.Wrong answer — click to see why▾
Why this is wrong here
While GPG key must be associated with the IAM user, the issue is that CodeCommit doesn't support pre-receive hooks.
✗The hook script has a syntax error.Wrong answer — click to see why▾
Why this is wrong here
Even if the script is correct, CodeCommit does not execute pre-receive hooks.
✗The repository is not configured to require signed commits.Wrong answer — click to see why▾
Why this is wrong here
CodeCommit does not have a built-in setting to require signed commits; the hook is the intended mechanism, but it's not supported.
Analysis generated from the official DOP-C02blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse CodeCommit with self-managed Git platforms (like GitHub or GitLab) that support pre-receive hooks, leading them to assume CodeCommit also supports this feature, when in fact CodeCommit uses a different enforcement mechanism (repository-level settings and IAM policies).
Detailed technical explanation
How to think about this question
CodeCommit relies on Git's built-in commit signing verification, which is enforced via the 'git push --signed' flag and the repository's 'requireSignedCommits' setting (enabled via the AWS CLI or console). Pre-receive hooks are a server-side Git feature that CodeCommit does not implement because it uses a managed, scalable architecture where custom server-side scripts are not supported. In practice, to enforce signed commits in CodeCommit, you must enable the 'requireSignedCommits' option on the repository and ensure all users have their GPG keys configured in their local Git client, not in IAM.
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 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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: CodeCommit does not support pre-receive hooks. — AWS CodeCommit does not support pre-receive hooks. Pre-receive hooks are a feature of self-managed Git repositories (e.g., GitHub Enterprise, GitLab, or on-premises Git servers) that run on the server before accepting a push. CodeCommit uses IAM policies and repository-level settings (such as requiring signed commits via the 'git push --signed' flag) to enforce commit signing, not server-side hooks. Therefore, any attempt to configure a pre-receive hook in CodeCommit will fail, causing all commits to be rejected.
What should I do if I get this DOP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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