- A
Amazon S3
Why wrong: S3 is not required for this pipeline.
- B
AWS CodeDeploy
Deploys the new task definition to ECS.
- C
AWS CodePipeline
Orchestrates build and deploy stages.
- D
AWS CodeCommit
Why wrong: CodeCommit is a source repository, but the pipeline can use other sources.
- E
AWS CodeBuild
Builds the Docker image.
Question 123 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 wants to implement a CI/CD pipeline for an application that runs on Amazon ECS with Fargate. The pipeline should build a Docker image, push it to Amazon ECR, and deploy a new task definition to ECS. Which THREE AWS services are required to build this pipeline?
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 CodeDeploy
AWS CodeDeploy is required because it manages the deployment of the updated task definition to the ECS service, supporting strategies like blue/green and canary deployments. It integrates with AWS CodePipeline to orchestrate the deployment step, ensuring minimal downtime and rollback capabilities.
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.
- ✗
Amazon S3
Why it's wrong here
S3 is not required for this pipeline.
- ✓
AWS CodeDeploy
Why this is correct
Deploys the new task definition to ECS.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
AWS CodePipeline
Why this is correct
Orchestrates build and deploy stages.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS CodeCommit
Why it's wrong here
CodeCommit is a source repository, but the pipeline can use other sources.
- ✓
AWS CodeBuild
Why this is correct
Builds the Docker image.
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 AWS CodeCommit is mandatory for source control in a CI/CD pipeline, but the pipeline can use any Git repository or S3 bucket as a source, making CodeCommit optional.
Detailed technical explanation
How to think about this question
Under the hood, AWS CodePipeline orchestrates the flow by invoking CodeBuild to build the Docker image and push it to ECR, then triggers CodeDeploy to update the ECS service with a new task definition. CodeDeploy uses the ECS blue/green deployment model, which creates a new task set, shifts traffic via an Application Load Balancer target group, and automatically rolls back if health checks fail. A subtle behavior is that CodeDeploy requires the ECS service to be configured with a 'CodeDeployDefault.ECSAllAtOnce' or similar deployment configuration to control traffic shifting.
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.
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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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: AWS CodeDeploy — AWS CodeDeploy is required because it manages the deployment of the updated task definition to the ECS service, supporting strategies like blue/green and canary deployments. It integrates with AWS CodePipeline to orchestrate the deployment step, ensuring minimal downtime and rollback capabilities.
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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