- A
AWS CloudFormation
CloudFormation is used to update the stack.
- B
Amazon CloudWatch Events
Why wrong: CloudWatch Events can trigger the pipeline, but the question asks for services used together; pipeline itself suffices.
- C
AWS CodeBuild
Why wrong: CodeBuild is not required for updating a CloudFormation stack directly; it can be used for linting but not essential.
- D
AWS CodeCommit
CodeCommit hosts the Git repository with the CloudFormation templates.
- E
AWS CodePipeline
CodePipeline can have a source stage from CodeCommit and a deploy stage that updates the CloudFormation stack.
Question 1,574 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 DevOps engineer is managing infrastructure as code using AWS CloudFormation. The engineer wants to automatically update a stack when changes are pushed to a Git repository. Which THREE services can be used together to achieve this?
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
✓
AWS CloudFormation
AWS CloudFormation is the core service that manages the infrastructure as code stack. When combined with AWS CodeCommit as the Git repository and AWS CodePipeline as the CI/CD orchestrator, changes pushed to the repository trigger a pipeline that automatically updates the CloudFormation stack. CodePipeline can directly invoke CloudFormation actions (create, update, delete stacks) using its built-in deployment provider, eliminating the need for intermediate compute services.
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 CloudFormation
Why this is correct
CloudFormation is used to update the stack.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon CloudWatch Events
Why it's wrong here
CloudWatch Events can trigger the pipeline, but the question asks for services used together; pipeline itself suffices.
- ✗
AWS CodeBuild
Why it's wrong here
CodeBuild is not required for updating a CloudFormation stack directly; it can be used for linting but not essential.
- ✓
AWS CodeCommit
Why this is correct
CodeCommit hosts the Git repository with the CloudFormation templates.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
AWS CodePipeline
Why this is correct
CodePipeline can have a source stage from CodeCommit and a deploy stage that updates the CloudFormation stack.
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 think Amazon CloudWatch Events (EventBridge) alone can trigger stack updates, but it lacks the deployment orchestration and rollback capabilities that CodePipeline provides natively for CloudFormation.
Detailed technical explanation
How to think about this question
AWS CodePipeline integrates with CloudFormation via the 'CreateReplaceChangeSet' and 'ExecuteChangeSet' actions, which allow for safe, staged updates with change set review. Under the hood, CodePipeline uses the CloudFormation API to create a change set from the template stored in CodeCommit, then executes it, ensuring rollback on failure. A real-world scenario is a multi-environment pipeline (dev, staging, prod) where each stage uses a different CloudFormation stack and parameter overrides, all triggered by a single Git push.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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: AWS CloudFormation — AWS CloudFormation is the core service that manages the infrastructure as code stack. When combined with AWS CodeCommit as the Git repository and AWS CodePipeline as the CI/CD orchestrator, changes pushed to the repository trigger a pipeline that automatically updates the CloudFormation stack. CodePipeline can directly invoke CloudFormation actions (create, update, delete stacks) using its built-in deployment provider, eliminating the need for intermediate compute services.
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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