- A
AWS CodePipeline with source polling.
Why wrong: Polling is inefficient and not event-driven for pull requests.
- B
AWS CodeBuild with webhooks from CodeCommit.
Why wrong: CodeBuild webhooks trigger on pushes, not pull requests.
- C
AWS CloudWatch Logs subscription filter for repository logs.
Why wrong: CloudWatch Logs subscription is not for triggering on events.
- D
Amazon EventBridge rule for CodeCommit pull request state changes targeting AWS Lambda.
EventBridge can capture pull request events and invoke Lambda.
Question 1,583 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 developer wants to automatically run unit tests when a pull request is created in AWS CodeCommit. Which AWS service should be used to trigger the tests?
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 rule for CodeCommit pull request state changes targeting AWS Lambda.
Amazon EventBridge can capture CodeCommit pull request state changes (e.g., created, updated, merged) via a rule and route them to a target like AWS Lambda. The Lambda function can then invoke unit tests in response to the pull request creation event. This provides a serverless, event-driven trigger without polling or webhooks.
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 with source polling.
Why it's wrong here
Polling is inefficient and not event-driven for pull requests.
- ✗
AWS CodeBuild with webhooks from CodeCommit.
Why it's wrong here
CodeBuild webhooks trigger on pushes, not pull requests.
- ✗
AWS CloudWatch Logs subscription filter for repository logs.
Why it's wrong here
CloudWatch Logs subscription is not for triggering on events.
- ✓
Amazon EventBridge rule for CodeCommit pull request state changes targeting AWS Lambda.
Why this is correct
EventBridge can capture pull request events and invoke Lambda.
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 often confuse CodeCommit webhooks (which only support push events) with EventBridge events (which support pull request state changes), leading them to incorrectly select AWS CodeBuild with webhooks.
Detailed technical explanation
How to think about this question
Amazon EventBridge uses a default event bus to capture CodeCommit events such as 'PullRequestCreated' and 'PullRequestStateChange' from the AWS service namespace. The rule can target a Lambda function, which receives the event payload containing details like the pull request ID, source branch, and repository name, enabling precise test execution. This pattern avoids the latency and overhead of polling and integrates natively with IAM roles for secure invocation.
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.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
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: Amazon EventBridge rule for CodeCommit pull request state changes targeting AWS Lambda. — Amazon EventBridge can capture CodeCommit pull request state changes (e.g., created, updated, merged) via a rule and route them to a target like AWS Lambda. The Lambda function can then invoke unit tests in response to the pull request creation event. This provides a serverless, event-driven trigger without polling or webhooks.
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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