The answer is to create a CodeCommit trigger that invokes an AWS Lambda function on every push to validate commit messages. This is the most efficient approach because CodeCommit natively supports event-driven triggers that fire on repository actions like pushes, allowing a Lambda function to inspect each commit message for a Jira key pattern and reject the push if the format is invalid. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of serverless validation patterns versus client-side or pull-request-only controls. A common trap is choosing branch policies, which only enforce rules on pull requests, not direct commits, or pre-commit hooks, which are client-side and cannot be centrally enforced. Remember the memory tip: "Triggers catch pushes, policies catch PRs"—if you need to validate every commit on every branch, a trigger with Lambda is your server-side gatekeeper.
DOP-C02 SDLC Automation Practice Question
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 for source control. They want to enforce that all commits include a JIRA issue key in the commit message. What is the MOST efficient way to achieve this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a CodeCommit trigger that invokes an AWS Lambda function on every push to validate commit messages.
Option D is correct because CodeCommit can trigger a Lambda function on pushes to run custom validation. Option A is wrong because branch policies are for pull requests, not commit messages. Option B is wrong because CloudWatch Events can trigger Lambda, but direct trigger from CodeCommit is simpler. Option C is wrong because pre-commit hooks are client-side and not enforceable.
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.
✗
Use Amazon CloudWatch Events to detect new commits and invoke a Lambda function to validate the commit message.
Why it's wrong here
CloudWatch Events can trigger on CodeCommit events, but CodeCommit's own triggers are more direct.
✗
Implement a pre-commit hook in each developer's local repository.
Why it's wrong here
Pre-commit hooks are client-side and can be bypassed.
✗
Configure a branch policy on the repository that requires commit message format.
Why it's wrong here
Branch policies are for pull requests, not for individual commits.
✓
Create a CodeCommit trigger that invokes an AWS Lambda function on every push to validate commit messages.
Why this is correct
CodeCommit triggers can invoke Lambda on push events, allowing validation of all commits.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
What to study next
Got this wrong? Here's your next step.
Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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: Create a CodeCommit trigger that invokes an AWS Lambda function on every push to validate commit messages. — Option D is correct because CodeCommit can trigger a Lambda function on pushes to run custom validation. Option A is wrong because branch policies are for pull requests, not commit messages. Option B is wrong because CloudWatch Events can trigger Lambda, but direct trigger from CodeCommit is simpler. Option C is wrong because pre-commit hooks are client-side and not enforceable.
What should I do if I get this DOP-C02 question wrong?
Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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