This DOP-C02 practice question tests your understanding of sdlc automation. 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.
A development team uses AWS CodeCommit and wants to enforce that all commits include a JIRA issue key in the commit message. They want to reject any push that does not contain a valid JIRA key. Which approach should the engineer use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a Lambda function triggered by CodeCommit push events that calls codecommit:PutRepositoryTriggers to reject
Option D is correct because CodeCommit can trigger a Lambda function on push events, and the Lambda can validate commit messages and reject the push. Option A is incorrect because pre-commit hooks are client-side and not enforced by AWS. Option B is incorrect because CodeCommit does not support server-side hooks natively. Option C is incorrect because CloudWatch Events can trigger Lambda but not reject pushes directly.
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.
✗
Create a CloudWatch Events rule that triggers a Lambda function on push
Why it's wrong here
CloudWatch Events can trigger but cannot reject the push.
✗
Use AWS CodeCommit hooks to validate commit messages
Why it's wrong here
CodeCommit does not have built-in hooks.
✓
Use a Lambda function triggered by CodeCommit push events that calls codecommit:PutRepositoryTriggers to reject
Why this is correct
Lambda can validate and reject the push using CodeCommit API.
Related concept
Static NAT maps one inside address to one outside address.
✗
Configure a pre-commit hook in the Git client
Why it's wrong here
Client-side hooks are not enforced centrally.
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 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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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 a Lambda function triggered by CodeCommit push events that calls codecommit:PutRepositoryTriggers to reject — Option D is correct because CodeCommit can trigger a Lambda function on push events, and the Lambda can validate commit messages and reject the push. Option A is incorrect because pre-commit hooks are client-side and not enforced by AWS. Option B is incorrect because CodeCommit does not support server-side hooks natively. Option C is incorrect because CloudWatch Events can trigger Lambda but not reject pushes directly.
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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