- A
Use AWS CloudFormation to deploy the ECS service
Why wrong: CloudFormation can be used but is not required; CodePipeline can deploy via ECS directly.
- B
Use AWS CodeDeploy to deploy the container to ECS with a blue/green deployment
Why wrong: CodeDeploy is an option for ECS but not a required action; the question asks for two actions to implement a basic pipeline.
- C
Store the Docker image in AWS CodeCommit
Why wrong: CodeCommit is for source code, not binary container images.
- D
Use CodeBuild to build the Docker image and push it to Amazon ECR
CodeBuild can run docker build and push to ECR as part of the pipeline.
- E
Configure CodePipeline to use Amazon ECR as a source for the container image
ECR can be a source action in CodePipeline to trigger the pipeline when a new image is pushed.
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.
Which TWO actions should a DevOps engineer take to implement a CI/CD pipeline that automatically deploys a containerized application to Amazon ECS using AWS CodePipeline and AWS CodeBuild? (Choose TWO.)
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
Use CodeBuild to build the Docker image and push it to Amazon ECR
Option D is correct because AWS CodeBuild can be configured to build the Docker image from source code and then push it to Amazon ECR using the `post_build` phase with commands like `docker push`. This is a standard pattern for containerized CI/CD pipelines, as ECR serves as the private registry for storing and versioning container images. Option E is correct because CodePipeline can use Amazon ECR as a source action, which triggers the pipeline automatically when a new image is pushed to the specified repository, enabling continuous deployment to ECS.
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 AWS CloudFormation to deploy the ECS service
Why it's wrong here
CloudFormation can be used but is not required; CodePipeline can deploy via ECS directly.
- ✗
Use AWS CodeDeploy to deploy the container to ECS with a blue/green deployment
Why it's wrong here
CodeDeploy is an option for ECS but not a required action; the question asks for two actions to implement a basic pipeline.
- ✗
Store the Docker image in AWS CodeCommit
Why it's wrong here
CodeCommit is for source code, not binary container images.
- ✓
Use CodeBuild to build the Docker image and push it to Amazon ECR
Why this is correct
CodeBuild can run docker build and push to ECR as part of the pipeline.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Configure CodePipeline to use Amazon ECR as a source for the container image
Why this is correct
ECR can be a source action in CodePipeline to trigger the pipeline when a new image is pushed.
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 the role of CodeDeploy (which is for EC2/on-premises deployments) with ECS deployment mechanisms, or mistakenly think CodeCommit can store Docker images instead of source code, leading them to select options B or C.
Detailed technical explanation
How to think about this question
Under the hood, CodeBuild uses a `buildspec.yml` file where the `phases` section defines build commands, and the `artifacts` section can specify the image to push to ECR. CodePipeline's ECR source action polls the repository for new image tags or uses Amazon EventBridge events to detect pushes, then passes the image URI as a pipeline variable to downstream actions like ECS deployment. A subtle behavior is that if you use ECR as a source, you must ensure the pipeline's IAM role has permissions for `ecr:DescribeImages` and `ecr:BatchGetImage` to fetch the image metadata.
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.
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: Use CodeBuild to build the Docker image and push it to Amazon ECR — Option D is correct because AWS CodeBuild can be configured to build the Docker image from source code and then push it to Amazon ECR using the `post_build` phase with commands like `docker push`. This is a standard pattern for containerized CI/CD pipelines, as ECR serves as the private registry for storing and versioning container images. Option E is correct because CodePipeline can use Amazon ECR as a source action, which triggers the pipeline automatically when a new image is pushed to the specified repository, enabling continuous deployment to ECS.
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: Jun 24, 2026
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