- A
Use AWS Lambda to dynamically change the pipeline definition.
Why wrong: Lambda can be used but is overkill; native branch filtering is simpler.
- B
Create separate pipelines for each branch and use tags.
Why wrong: Creating separate pipelines is overhead; one pipeline with branch filter is more efficient.
- C
Configure the source action with a branch filter using a regular expression.
CodePipeline source actions for CodeCommit support branch filters (e.g., using GitBranchPattern) to trigger pipelines based on branch names.
- D
Use a manual approval action to select the branch.
Why wrong: Manual approval does not automate branch selection.
Question 1,679 of 1,750
Using AWS CodePipeline Branch Filter Regex to Trigger Different Build Projects per Branch
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 team uses AWS CodePipeline with a multi-branch strategy. They want to run different build projects based on the branch name: 'main' triggers a production build, 'develop' triggers a staging build, and feature branches trigger a test build. Which CodePipeline feature should they 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
✓
Configure the source action with a branch filter using a regular expression.
Option C is correct because CodePipeline's source action supports branch filtering via regular expressions, allowing you to define which branch triggers which pipeline execution. By configuring a single pipeline with a branch filter regex (e.g., '^main$', '^develop$', '^feature/.*$'), you can route commits from different branches to different build projects without creating multiple pipelines or using external logic.
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 AWS Lambda to dynamically change the pipeline definition.
Why it's wrong here
Lambda can be used but is overkill; native branch filtering is simpler.
- ✗
Create separate pipelines for each branch and use tags.
Why it's wrong here
Creating separate pipelines is overhead; one pipeline with branch filter is more efficient.
- ✓
Configure the source action with a branch filter using a regular expression.
Why this is correct
CodePipeline source actions for CodeCommit support branch filters (e.g., using GitBranchPattern) to trigger pipelines based on branch names.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use a manual approval action to select the branch.
Why it's wrong here
Manual approval does not automate branch selection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often overcomplicate the solution by thinking they need external orchestration (Lambda) or multiple pipelines, when CodePipeline's native branch filter with regex is the simplest and most efficient approach.
Detailed technical explanation
How to think about this question
Under the hood, CodePipeline's source action (e.g., for CodeCommit or GitHub) uses a 'Branch' configuration field that accepts a regular expression pattern. When a push event occurs, CodePipeline evaluates the branch name against the regex; if it matches, the pipeline execution starts with the corresponding source artifact. A subtle behavior is that if multiple branches match the same regex (e.g., 'feature/.*' matches both 'feature/foo' and 'feature/bar'), each push triggers a separate pipeline execution, which is ideal for feature branch workflows.
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: Configure the source action with a branch filter using a regular expression. — Option C is correct because CodePipeline's source action supports branch filtering via regular expressions, allowing you to define which branch triggers which pipeline execution. By configuring a single pipeline with a branch filter regex (e.g., '^main$', '^develop$', '^feature/.*$'), you can route commits from different branches to different build projects without creating multiple pipelines or using external logic.
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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