- A
Create a CodeBuild project that watches the main branch and starts a pipeline.
Why wrong: CodeBuild does not have built-in branch monitoring to start pipelines.
- B
Use AWS Lambda to poll the repository and start the pipeline on new commits.
Why wrong: This adds unnecessary complexity; CodePipeline can directly integrate with CodeCommit.
- C
Set up an Amazon CloudWatch Events rule that matches commits to the main branch and targets the CodePipeline.
Why wrong: This is possible but not the most straightforward solution; the pipeline source stage is simpler.
- D
Configure the source stage of the CodePipeline to use the CodeCommit repository and specify the main branch.
This directly triggers the pipeline on commits to main.
Question 1,094 of 1,750
DOP-C02 SDLC Automation Practice Question
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 development team uses AWS CodeCommit to store source code and AWS CodePipeline to automate builds and deployments. The team wants to ensure that every commit to the main branch triggers a build and deployment to a test environment. Which action should be taken?
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
✓
Configure the source stage of the CodePipeline to use the CodeCommit repository and specify the main branch.
Option D is correct because CodePipeline natively integrates with CodeCommit as a source action. By configuring the source stage to use the CodeCommit repository and specifying the main branch, the pipeline automatically triggers on every commit to that branch without any additional infrastructure or polling. This is the simplest and most reliable approach, as CodePipeline uses Amazon CloudWatch Events under the hood to detect changes.
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 CodeBuild project that watches the main branch and starts a pipeline.
Why it's wrong here
CodeBuild does not have built-in branch monitoring to start pipelines.
- ✗
Use AWS Lambda to poll the repository and start the pipeline on new commits.
Why it's wrong here
This adds unnecessary complexity; CodePipeline can directly integrate with CodeCommit.
- ✗
Set up an Amazon CloudWatch Events rule that matches commits to the main branch and targets the CodePipeline.
Why it's wrong here
This is possible but not the most straightforward solution; the pipeline source stage is simpler.
- ✓
Configure the source stage of the CodePipeline to use the CodeCommit repository and specify the main branch.
Why this is correct
This directly triggers the pipeline on commits to main.
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 may overthink the solution and choose a more complex option (like Lambda polling or manual CloudWatch Events rules) instead of recognizing that CodePipeline's native source configuration already handles event-driven triggers automatically.
Detailed technical explanation
How to think about this question
Under the hood, when you configure a CodePipeline source stage with a CodeCommit repository and branch, CodePipeline automatically creates an Amazon CloudWatch Events rule that listens for the 'Reference Created' event (for new branches) or 'Reference Updated' event (for commits to existing branches) on the specified branch. This event triggers the pipeline execution. The pipeline then fetches the latest commit from the repository and passes the commit ID as a variable to subsequent stages. In real-world scenarios, this ensures that every push to main triggers a build and deployment without manual intervention or custom code.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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: Configure the source stage of the CodePipeline to use the CodeCommit repository and specify the main branch. — Option D is correct because CodePipeline natively integrates with CodeCommit as a source action. By configuring the source stage to use the CodeCommit repository and specifying the main branch, the pipeline automatically triggers on every commit to that branch without any additional infrastructure or polling. This is the simplest and most reliable approach, as CodePipeline uses Amazon CloudWatch Events under the hood to detect changes.
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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