- A
Configure CodePipeline to poll the CodeCommit repository every minute
Why wrong: Polling is inefficient and not real-time.
- B
Use Amazon EventBridge to capture CodeCommit events and start a CodePipeline execution
Why wrong: More complex than necessary; triggers are simpler.
- C
Set up a scheduled CodePipeline execution using Amazon CloudWatch Events
Why wrong: Scheduled builds do not respond to code pushes.
- D
Configure a CodeCommit repository trigger to invoke a Lambda function that starts a CodeBuild build
Triggers provide immediate response to pushes.
Question 880 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 development team is using AWS CodeCommit as the source for a CI/CD pipeline. They want to automatically trigger a build in AWS CodeBuild whenever a developer pushes changes to any branch in the repository. Which pipeline configuration should be used?
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 CodeCommit repository trigger to invoke a Lambda function that starts a CodeBuild build
Option D is correct because CodeCommit repository triggers can directly invoke a Lambda function on push events, and that Lambda can start a CodeBuild build. This provides the exact per-branch push event trigger the team needs without polling or scheduled executions, and it works for all branches automatically.
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 CodePipeline to poll the CodeCommit repository every minute
Why it's wrong here
Polling is inefficient and not real-time.
- ✗
Use Amazon EventBridge to capture CodeCommit events and start a CodePipeline execution
Why it's wrong here
More complex than necessary; triggers are simpler.
- ✗
Set up a scheduled CodePipeline execution using Amazon CloudWatch Events
Why it's wrong here
Scheduled builds do not respond to code pushes.
- ✓
Configure a CodeCommit repository trigger to invoke a Lambda function that starts a CodeBuild build
Why this is correct
Triggers provide immediate response to pushes.
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 assume CodePipeline is required for any CI/CD automation, but the question explicitly asks to trigger a CodeBuild build directly, making a CodeCommit trigger with Lambda the simplest and most direct solution.
Detailed technical explanation
How to think about this question
CodeCommit repository triggers use Amazon SNS or AWS Lambda as targets, and when configured with a Lambda function, the function receives an event payload containing details about the push (e.g., branch, commit IDs). The Lambda can then call the CodeBuild StartBuild API with the branch name as an environment variable or source version override, enabling per-branch builds. This pattern is common in event-driven CI/CD where you want to avoid the overhead of a full pipeline for simple build-on-push 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.
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.
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SDLC Automation — study guide chapter
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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 CodeCommit repository trigger to invoke a Lambda function that starts a CodeBuild build — Option D is correct because CodeCommit repository triggers can directly invoke a Lambda function on push events, and that Lambda can start a CodeBuild build. This provides the exact per-branch push event trigger the team needs without polling or scheduled executions, and it works for all branches automatically.
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.
About these practice questions
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Last reviewed: Jul 4, 2026
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