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 for source control and wants to automatically run unit tests on every push to the main branch. Which AWS service should they use to trigger the tests?
AWS CodeBuild
Why wrong: CodeBuild is a build service, not a trigger orchestrator.
Amazon CloudWatch Events
Why wrong: CloudWatch Events can trigger actions, but CodePipeline is the standard CI/CD orchestrator.
AWS CodePipeline
CodePipeline can be configured to start on CodeCommit push and run tests.
AWS CodeDeploy
Why wrong: CodeDeploy is for deployment, not testing.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS CodePipeline
AWS CodePipeline is the correct service because it provides a fully managed continuous delivery service that can be configured to automatically trigger a build action (such as running unit tests in AWS CodeBuild) whenever a change is pushed to a specified branch in AWS CodeCommit. This is achieved by setting the source stage to the CodeCommit repository and branch, and then adding a build stage that invokes CodeBuild to execute the tests, enabling an automated CI/CD workflow.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
AWS CodeBuild
Why it's wrong here
CodeBuild is a build service, not a trigger orchestrator.
Amazon CloudWatch Events
Why it's wrong here
CloudWatch Events can trigger actions, but CodePipeline is the standard CI/CD orchestrator.
AWS CodePipeline
Why this is correct
CodePipeline can be configured to start on CodeCommit push and run tests.
Related concept
Read the scenario before looking for a memorised answer.
AWS CodeDeploy
Why it's wrong here
CodeDeploy is for deployment, not testing.
Common exam traps
The trap here is that candidates often confuse AWS CodeBuild as a standalone trigger because it can run tests, but they overlook that CodeBuild lacks native event-driven triggers and requires an orchestrator like CodePipeline or EventBridge to automate the start on a repository push.
Detailed technical explanation
Under the hood, CodePipeline uses a polling mechanism or webhook integration to detect changes in the CodeCommit repository, and when a push to the specified branch occurs, it automatically transitions the pipeline to the next stage. In a real-world scenario, teams often combine CodePipeline with CodeBuild to run unit tests in parallel across multiple environments, and they can also integrate manual approval steps or additional testing stages (e.g., integration tests) before deployment. A subtle behavior is that CodePipeline's source action can be configured to use a CloudWatch Events rule for near-instantaneous triggering, reducing latency compared to the default polling interval of approximately 5 minutes.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
The correct answer is: AWS CodePipeline — AWS CodePipeline is the correct service because it provides a fully managed continuous delivery service that can be configured to automatically trigger a build action (such as running unit tests in AWS CodeBuild) whenever a change is pushed to a specified branch in AWS CodeCommit. This is achieved by setting the source stage to the CodeCommit repository and branch, and then adding a build stage that invokes CodeBuild to execute the tests, enabling an automated CI/CD workflow.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 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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