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 for source control and wants to enforce that all commits to the main branch are signed. The DevOps team has configured Git commit signing using GPG keys. However, some developers are able to push unsigned commits to main. What should the engineer do to enforce signed commits?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use an AWS CodeCommit trigger with an AWS Lambda function that validates commit signatures and rejects unsigned commits.
Option C is correct because CodeCommit repository policies can require commit signing. Option A does not enforce signing. Option B is not a repository setting. Option D is a CodeCommit feature for notifications, not enforcement.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Set the 'requireSignedCommits' parameter in the repository configuration to 'true'.
Why it's wrong here
This parameter does not exist in CodeCommit.
✗
Configure branch protection rules in IAM to deny push access to main unless the commit is signed.
Why it's wrong here
IAM cannot inspect commit signatures.
✓
Use an AWS CodeCommit trigger with an AWS Lambda function that validates commit signatures and rejects unsigned commits.
Why this is correct
Lambda can validate signatures and reject pushes via CodeCommit's ability to reject triggers.
Related concept
Static NAT maps one inside address to one outside address.
✗
Create a repository policy that denies git push actions unless the condition 'codecommit:References' and 'codecommit:SourceIp' match.
Why it's wrong here
This does not check signatures.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
SDLC Automation — This question tests SDLC Automation — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use an AWS CodeCommit trigger with an AWS Lambda function that validates commit signatures and rejects unsigned commits. — Option C is correct because CodeCommit repository policies can require commit signing. Option A does not enforce signing. Option B is not a repository setting. Option D is a CodeCommit feature for notifications, not enforcement.
What should I do if I get this DOP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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