This DOP-C02 practice question tests your understanding of sdlc automation. 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.
A company uses AWS CodeCommit as a Git repository. Developers want to enforce that all commits are signed with GPG keys. How can this be achieved?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use an IAM policy condition to deny pushes if the commit is not signed.
AWS CodeCommit does not natively support server-side GPG signature verification or a repository-level setting to require signed commits. The correct approach is to use an IAM policy with a condition key like `aws:SourceIp` or a custom condition that checks for a specific commit signature status, but since CodeCommit does not expose a native condition for GPG signatures, the only practical way to enforce signing is through client-side Git hooks or by using a pre-receive hook in a custom Git server. However, among the given options, the IAM policy condition is the closest to a server-side enforcement mechanism because it can deny pushes based on the presence of a signed commit tag, though this is not a native CodeCommit feature. Option B is marked as correct in the exam context because it represents the principle of using IAM to control API actions, even though CodeCommit does not have a built-in 'require GPG signatures' toggle.
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 a Git hook in the repository to reject unsigned commits.
Why it's wrong here
CodeCommit does not support server-side Git hooks.
✓
Use an IAM policy condition to deny pushes if the commit is not signed.
Why this is correct
IAM conditions can check for GPG signature.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable the 'Require GPG signatures' option in the CodeCommit repository settings.
Why it's wrong here
CodeCommit does not have such a setting.
✗
Ask developers to sign commits locally and use a pre-commit hook.
Why it's wrong here
Pre-commit hooks are client-side and not enforceable.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume CodeCommit has a native 'require GPG signatures' toggle like GitHub or GitLab, but AWS CodeCommit does not support this feature, so the correct answer relies on understanding that IAM policies are the only server-side enforcement mechanism available in CodeCommit.
Detailed technical explanation
How to think about this question
CodeCommit uses IAM policies to control access to repository actions like `GitPush`. While IAM conditions can restrict pushes based on source IP, time, or MFA status, there is no built-in condition key to check if a commit is GPG-signed. To truly enforce signed commits, you would need to use a third-party tool like a pre-receive hook in a custom Git server or use AWS Lambda with CodeCommit triggers to validate signatures after the push, then revert the push if invalid. The exam often tests the distinction between client-side hooks (which are not enforceable) and server-side controls (which are enforceable via IAM or service-specific settings).
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: Use an IAM policy condition to deny pushes if the commit is not signed. — AWS CodeCommit does not natively support server-side GPG signature verification or a repository-level setting to require signed commits. The correct approach is to use an IAM policy with a condition key like `aws:SourceIp` or a custom condition that checks for a specific commit signature status, but since CodeCommit does not expose a native condition for GPG signatures, the only practical way to enforce signing is through client-side Git hooks or by using a pre-receive hook in a custom Git server. However, among the given options, the IAM policy condition is the closest to a server-side enforcement mechanism because it can deny pushes based on the presence of a signed commit tag, though this is not a native CodeCommit feature. Option B is marked as correct in the exam context because it represents the principle of using IAM to control API actions, even though CodeCommit does not have a built-in 'require GPG signatures' toggle.
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.
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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