- A
AWS CodePipeline
Why wrong: CodePipeline is for orchestration, not direct event triggering from CodeCommit.
- B
Amazon EventBridge
EventBridge can capture CodeCommit events and trigger CodeBuild directly.
- C
AWS Lambda
Why wrong: Lambda can be used but is not the simplest direct integration; EventBridge is designed for this.
- D
Amazon Simple Notification Service (SNS)
Why wrong: SNS can send notifications but cannot directly start a CodeBuild build.
Question 1,526 of 1,750
Using EventBridge to Start CodeBuild from CodeCommit PR Events
This DOP-C02 practice question tests your understanding of sdlc automation. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 is using AWS CodeCommit for source control and wants to automatically trigger a build in AWS CodeBuild whenever a pull request is created against the main branch. Which AWS service should be used to connect CodeCommit events to CodeBuild?
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
✓
Amazon EventBridge
Amazon EventBridge is the correct choice because it can capture CodeCommit repository events (such as pull request creation) via a default event bus and route them to targets like CodeBuild. This allows you to define a rule that matches the 'codecommit: PullRequestCreated' event and triggers a CodeBuild project directly, without needing an intermediary pipeline or compute service.
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.
- ✗
AWS CodePipeline
Why it's wrong here
CodePipeline is for orchestration, not direct event triggering from CodeCommit.
- ✓
Amazon EventBridge
Why this is correct
EventBridge can capture CodeCommit events and trigger CodeBuild directly.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Lambda
Why it's wrong here
Lambda can be used but is not the simplest direct integration; EventBridge is designed for this.
- ✗
Amazon Simple Notification Service (SNS)
Why it's wrong here
SNS can send notifications but cannot directly start a CodeBuild build.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose AWS CodePipeline because they assume a full CI/CD pipeline is required for any build trigger, but EventBridge provides a simpler, event-driven integration that directly connects CodeCommit events to CodeBuild without pipeline overhead.
Detailed technical explanation
How to think about this question
Under the hood, EventBridge uses a default event bus that automatically receives AWS service events, including CodeCommit repository events. You can create a rule with an event pattern like {"source":["aws.codecommit"],"detail-type":["CodeCommit Pull Request State Change"],"detail":{"event":["pullRequestCreated"],"repositoryName":["main"]}} and set the target to a CodeBuild project ARN, which invokes the build with the pull request details. A subtle behavior is that the CodeBuild project must have a webhook configured or be set to 'SINGLE_BUILD' mode to accept the event; otherwise, the trigger may silently fail.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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: Amazon EventBridge — Amazon EventBridge is the correct choice because it can capture CodeCommit repository events (such as pull request creation) via a default event bus and route them to targets like CodeBuild. This allows you to define a rule that matches the 'codecommit: PullRequestCreated' event and triggers a CodeBuild project directly, without needing an intermediary pipeline or compute service.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on DOP-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A development team uses AWS CodeCommit as a Git repository. They want to automatically trigger a build in AWS CodeBuild whenever a pull request is created or updated. Which AWS service should be used to detect the pull request events and start the build?
easy- A.Amazon Simple Notification Service (SNS)
- B.AWS CodePipeline
- C.Amazon CloudWatch Logs
- ✓ D.Amazon EventBridge
Why D: Amazon EventBridge can capture CodeCommit repository events, such as pull request creation and updates, via its event bus. By setting up an EventBridge rule that matches these specific events, you can directly trigger an AWS CodeBuild project as a target, enabling automated builds without additional orchestration services.
Keep practising
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Last reviewed: Jul 4, 2026
This DOP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DOP-C02 exam.
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