- A
Create a CodeCommit trigger that invokes CodeBuild on 'Pull Request Created' and 'Pull Request Updated' events.
CodeCommit supports triggers for CodeBuild.
- B
Use Amazon SNS to notify CodeBuild when a pull request is created.
Why wrong: SNS cannot directly invoke CodeBuild.
- C
Use Amazon CloudWatch Events to detect CodeCommit pull request events and invoke CodeBuild.
Why wrong: Possible but more complex; CodeCommit trigger is simpler.
- D
Configure CodePipeline with a source action on CodeCommit and a build action, and set the pipeline to start on source changes.
Why wrong: CodePipeline starts on push, not pull request.
Question 1,337 of 1,750
Configuring Native CodeCommit Triggers for PR Builds
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 development team uses AWS CodeCommit as a Git repository. They want to automatically trigger a build in AWS CodeBuild when a pull request is created or updated. Which configuration should the team use?
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 CodeBuild on 'Pull Request Created' and 'Pull Request Updated' events.
Option A is correct because CodeCommit supports direct triggers for events like 'Pull Request Created' and 'Pull Request Updated', which can invoke AWS CodeBuild without any intermediate services. This is the simplest and most direct integration for automatically starting a build when a pull request is created or updated.
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.
- ✓
Create a CodeCommit trigger that invokes CodeBuild on 'Pull Request Created' and 'Pull Request Updated' events.
Why this is correct
CodeCommit supports triggers for CodeBuild.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use Amazon SNS to notify CodeBuild when a pull request is created.
Why it's wrong here
SNS cannot directly invoke CodeBuild.
- ✗
Use Amazon CloudWatch Events to detect CodeCommit pull request events and invoke CodeBuild.
Why it's wrong here
Possible but more complex; CodeCommit trigger is simpler.
- ✗
Configure CodePipeline with a source action on CodeCommit and a build action, and set the pipeline to start on source changes.
Why it's wrong here
CodePipeline starts on push, not pull request.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often overcomplicate the solution by choosing CloudWatch Events or CodePipeline, not realizing that CodeCommit has native trigger support for pull request events that can directly invoke CodeBuild without additional services.
Detailed technical explanation
How to think about this question
CodeCommit triggers use Amazon SNS or AWS Lambda as targets, but for CodeBuild, the trigger directly invokes the CodeBuild project via the AWS API, bypassing intermediate services. Under the hood, CodeCommit publishes events to an internal event bus, and the trigger configuration creates a subscription that calls the StartBuild API with the pull request metadata, including the source commit ID and merge branch. This is particularly useful in CI/CD pipelines where you want to validate code changes before merging, ensuring only tested code enters the main branch.
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.
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 CodeBuild on 'Pull Request Created' and 'Pull Request Updated' events. — Option A is correct because CodeCommit supports direct triggers for events like 'Pull Request Created' and 'Pull Request Updated', which can invoke AWS CodeBuild without any intermediate services. This is the simplest and most direct integration for automatically starting a build when a pull request is created or updated.
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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