- A
Configure a CloudWatch Events rule to start the pipeline when a CodeCommit pull request is merged
Another way to trigger on merge.
- B
Use an S3 source and configure event notifications for all object uploads
Why wrong: Would trigger on any upload, not just merges.
- C
Use AWS CodeCommit as the source and configure a trigger for pull request merge events
Triggers pipeline only on merge.
- D
Set the pipeline to execute on every push to any branch
Why wrong: Would deploy unapproved changes.
- E
Add an approval stage in the pipeline that requires manual sign-off
Ensures only approved changes proceed.
Question 651 of 1,750
DOP-C02 SDLC Automation Practice Question
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 DevOps team uses AWS CodePipeline with an Amazon S3 source action. The pipeline deploys a static website to an S3 bucket. The engineer wants to ensure that only approved changes are deployed to production. The team uses Git feature branches and wants to deploy only when a pull request is merged to the main branch. Which THREE actions should the engineer take?
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 a CloudWatch Events rule to start the pipeline when a CodeCommit pull request is merged
Option A is correct because a CloudWatch Events rule can be configured to detect a CodeCommit pull request merge event (via the referenceUpdated event type) and trigger the pipeline automatically. This ensures the pipeline runs only when approved changes are merged to the main branch, aligning with the requirement to deploy only approved 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.
- ✓
Configure a CloudWatch Events rule to start the pipeline when a CodeCommit pull request is merged
Why this is correct
Another way to trigger on merge.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use an S3 source and configure event notifications for all object uploads
Why it's wrong here
Would trigger on any upload, not just merges.
- ✓
Use AWS CodeCommit as the source and configure a trigger for pull request merge events
Why this is correct
Triggers pipeline only on merge.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Set the pipeline to execute on every push to any branch
Why it's wrong here
Would deploy unapproved changes.
- ✓
Add an approval stage in the pipeline that requires manual sign-off
Why this is correct
Ensures only approved changes proceed.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common pitfall is to assume that configuring the pipeline to trigger only on pull request merges (options A and C) alone satisfies the requirement of deploying only approved changes. While this ensures that only merged code enters the pipeline, it does not provide a final human approval gate. The question asks for three actions, and option E (manual approval stage) is also correct because it adds an additional layer of verification before deployment to production. Candidates might incorrectly select only two options or think manual approval is redundant.
Detailed technical explanation
How to think about this question
Under the hood, CodePipeline can be triggered by CloudWatch Events that match the CodeCommit repository's referenceUpdated event with a specific pattern (e.g., branch name 'main' and event type 'pullRequestMerged'). This avoids polling and ensures near-real-time execution. In a real-world scenario, this pattern is critical for maintaining a strict GitFlow workflow where only merged PRs to the main branch trigger production deployments.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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 a CloudWatch Events rule to start the pipeline when a CodeCommit pull request is merged — Option A is correct because a CloudWatch Events rule can be configured to detect a CodeCommit pull request merge event (via the referenceUpdated event type) and trigger the pipeline automatically. This ensures the pipeline runs only when approved changes are merged to the main branch, aligning with the requirement to deploy only approved 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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