- A
Use Amazon CloudWatch Events to detect new commits and invoke a Lambda function to validate the commit message.
Why wrong: CloudWatch Events can trigger on CodeCommit events, but CodeCommit's own triggers are more direct.
- B
Implement a pre-commit hook in each developer's local repository.
Why wrong: Pre-commit hooks are client-side and can be bypassed.
- C
Configure a branch policy on the repository that requires commit message format.
Why wrong: Branch policies are for pull requests, not for individual commits.
- D
Create a CodeCommit trigger that invokes an AWS Lambda function on every push to validate commit messages.
CodeCommit triggers can invoke Lambda on push events, allowing validation of all commits.
Question 1,070 of 1,750
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 choices
Why each option matters
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 triggers can invoke an AWS Lambda function on every push event, allowing real-time validation of commit messages against a required pattern (e.g., JIRA issue key). This serverless approach enforces the policy centrally without relying on client-side configurations, making it the most efficient and reliable method for a team using AWS CodeCommit.
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
The trap here is that candidates confuse CodeCommit branch policies (which enforce approval workflows and restrict direct pushes) with the ability to validate commit message format, but branch policies do not support message validation—only CodeCommit triggers with Lambda can perform custom validation on commit content.
Detailed technical explanation
How to think about this question
CodeCommit triggers use Amazon SNS or AWS Lambda as targets, and when configured with an 'All repository events' or 'Push to existing branch' event, the Lambda function receives a payload containing commit details (e.g., commit ID, message, committer). The function can parse the commit message using regex (e.g., /[A-Z]+-\d+/) and, if invalid, optionally delete the branch reference or notify via SNS, though deletion is destructive and typically a notification or rollback via Git commands is preferred. In real-world scenarios, teams often combine this with a post-commit validation that reverts non-compliant pushes using the CodeCommit API's BatchDeleteCommits or by updating the branch pointer.
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 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.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
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 triggers can invoke an AWS Lambda function on every push event, allowing real-time validation of commit messages against a required pattern (e.g., JIRA issue key). This serverless approach enforces the policy centrally without relying on client-side configurations, making it the most efficient and reliable method for a team using AWS CodeCommit.
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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Last reviewed: Jul 4, 2026
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