- A
Use CloudFormation to deploy the ECS service with a rolling update policy.
Why wrong: CloudFormation is not needed; CodePipeline can deploy directly.
- B
Add a manual approval stage in CodePipeline between staging and production.
This ensures manual approval before production deployment.
- C
Set up an ECS task definition with a sidecar container for health checks.
Why wrong: Not necessary for rolling update.
- D
Use the ECS-to-CodePipeline deploy action configured for rolling update.
CodePipeline native ECS deploy action supports rolling updates.
- E
Configure CodeBuild to push the Docker image to Amazon ECR.
Why wrong: This is typically needed but not specific to the staging/production separation.
Question 926 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 company is implementing a CI/CD pipeline for a containerized application using AWS CodePipeline, CodeBuild, and Amazon ECS. The pipeline should automatically deploy to a staging environment and then, after manual approval, to production. The production environment uses an ECS service with rolling update deployment. Which TWO actions are necessary 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
✓
Add a manual approval stage in CodePipeline between staging and production.
Option B is correct because a manual approval stage in CodePipeline allows a human to review and approve the deployment before it proceeds to production, which is a common requirement for controlled rollouts. Option D is correct because the ECS-to-CodePipeline deploy action (using the ECS deploy provider) natively supports rolling update deployments by updating the ECS service with the new task definition, which aligns with the requirement for a rolling update strategy.
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 CloudFormation to deploy the ECS service with a rolling update policy.
Why it's wrong here
CloudFormation is not needed; CodePipeline can deploy directly.
- ✓
Add a manual approval stage in CodePipeline between staging and production.
Why this is correct
This ensures manual approval before production deployment.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Set up an ECS task definition with a sidecar container for health checks.
Why it's wrong here
Not necessary for rolling update.
- ✓
Use the ECS-to-CodePipeline deploy action configured for rolling update.
Why this is correct
CodePipeline native ECS deploy action supports rolling updates.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure CodeBuild to push the Docker image to Amazon ECR.
Why it's wrong here
This is typically needed but not specific to the staging/production separation.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume CloudFormation is required for any infrastructure change in a pipeline, but CodePipeline's native ECS deploy action directly updates the service without needing CloudFormation, and the rolling update is a built-in behavior of the ECS service itself.
Detailed technical explanation
How to think about this question
The ECS deploy action in CodePipeline uses the ECS service's deployment controller (default 'ECS' which performs a rolling update) to gradually replace running tasks with new ones based on the updated task definition. The rolling update respects the minimum and maximum healthy percentages defined in the ECS service (e.g., min 100%, max 200%), ensuring zero downtime if configured correctly. Manual approval stages in CodePipeline are implemented using SNS notifications and a custom approval token that must be provided via the CodePipeline console or API to proceed.
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: Add a manual approval stage in CodePipeline between staging and production. — Option B is correct because a manual approval stage in CodePipeline allows a human to review and approve the deployment before it proceeds to production, which is a common requirement for controlled rollouts. Option D is correct because the ECS-to-CodePipeline deploy action (using the ECS deploy provider) natively supports rolling update deployments by updating the ECS service with the new task definition, which aligns with the requirement for a rolling update strategy.
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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