- A
AWS CodeDeploy
CodeDeploy supports canary deployments for ECS.
- B
AWS CloudFormation
Why wrong: CloudFormation does not support canary deployments natively.
- C
AWS CodeBuild
Why wrong: CodeBuild is for building, not deployment.
- D
Amazon CloudWatch
CloudWatch monitors metrics to determine canary success.
- E
Amazon EC2 Auto Scaling
Why wrong: Not directly related to canary deployments.
Question 197 of 1,750
Essential Services for ECS Canary Deployments
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 team is designing a CI/CD pipeline for a microservices application that runs on Amazon ECS. They need to implement automated canary deployments. Which TWO AWS services would be essential for this implementation?
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 essential because it natively supports canary deployments for Amazon ECS through its ECS blue/green deployment type, allowing you to specify a canary traffic shift (e.g., 10% for 5 minutes) before full promotion. This enables automated, controlled rollouts with built-in rollback capabilities based on CloudWatch alarms.
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 CodeDeploy
Why this is correct
CodeDeploy supports canary deployments for ECS.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS CloudFormation
Why it's wrong here
CloudFormation does not support canary deployments natively.
- ✗
AWS CodeBuild
Why it's wrong here
CodeBuild is for building, not deployment.
- ✓
Amazon CloudWatch
Why this is correct
CloudWatch monitors metrics to determine canary success.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon EC2 Auto Scaling
Why it's wrong here
Not directly related to canary deployments.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS CodeDeploy with AWS CloudFormation for deployment strategies, or mistakenly think EC2 Auto Scaling is needed for ECS canary deployments, when in fact CodeDeploy and CloudWatch are the essential pair for traffic shifting and monitoring.
Detailed technical explanation
How to think about this question
Under the hood, CodeDeploy uses an AppSpec file with a 'Hooks' section to run lifecycle events (e.g., BeforeAllowTraffic, AfterAllowTraffic) and integrates with ECS to shift traffic via an Application Load Balancer (ALB) target group weighting. The canary percentage and interval are defined in the deployment configuration (e.g., 'CodeDeployDefault.ECSLinear10PercentEvery3Minutes'), and CloudWatch alarms are polled during the canary window to trigger automatic rollback if metrics breach thresholds.
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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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 essential because it natively supports canary deployments for Amazon ECS through its ECS blue/green deployment type, allowing you to specify a canary traffic shift (e.g., 10% for 5 minutes) before full promotion. This enables automated, controlled rollouts with built-in rollback capabilities based on CloudWatch alarms.
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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