- A
AWS CloudFormation and SSM
Why wrong: CloudFormation is for infrastructure, not for canary traffic shifting with automated rollback.
- B
AWS Lambda and Step Functions
Why wrong: These are for serverless orchestration, not for ECS canary deployments.
- C
AWS CodeDeploy with CloudWatch alarms
CodeDeploy supports canary deployments and integrates with CloudWatch alarms for automatic rollback.
- D
AWS Elastic Beanstalk and Route 53
Why wrong: Elastic Beanstalk supports rolling updates but not canary with automatic rollback based on error rates.
Question 916 of 997
CV0-004 Deployment Practice Question
This CV0-004 practice question tests your understanding of deployment. 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 implementing a canary deployment for a microservice running on Amazon ECS. They want to gradually shift 10% of traffic to the new version and automatically roll back if error rates exceed 1% in 5 minutes. Which combination of services should they use?
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 with CloudWatch alarms
AWS CodeDeploy natively supports canary deployments for Amazon ECS, allowing you to specify a traffic shift percentage (e.g., 10%) and integrate with CloudWatch alarms to automatically trigger a rollback when error rates exceed a defined threshold (e.g., 1% over 5 minutes). This combination directly fulfills the gradual traffic shifting and automated rollback requirements without custom scripting.
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 and SSM
Why it's wrong here
CloudFormation is for infrastructure, not for canary traffic shifting with automated rollback.
- ✗
AWS Lambda and Step Functions
Why it's wrong here
These are for serverless orchestration, not for ECS canary deployments.
- ✓
AWS CodeDeploy with CloudWatch alarms
Why this is correct
CodeDeploy supports canary deployments and integrates with CloudWatch alarms for automatic rollback.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Elastic Beanstalk and Route 53
Why it's wrong here
Elastic Beanstalk supports rolling updates but not canary with automatic rollback based on error rates.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that any orchestration service (like Step Functions) is equivalent to a native deployment service, but the key is that CodeDeploy provides built-in traffic shifting and alarm-based rollback without custom code, which is the exact requirement in the question.
Detailed technical explanation
How to think about this question
CodeDeploy uses an AppSpec file to define the ECS task set and the traffic routing configuration (e.g., canary 10 percent 5 minutes). Under the hood, it leverages Amazon ECS deployment circuit breaker and target group weights on the Application Load Balancer to shift traffic, and CloudWatch alarms monitor the error rate metric (e.g., HTTP 5xx count) to trigger an automatic rollback by re-routing all traffic to the original task set. A subtle behavior is that the rollback is not instantaneous; it waits for the alarm to transition to ALARM state, which can take up to one additional evaluation period beyond the 5-minute window.
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 practitioner preparing for the CV0-004 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this CV0-004 question test?
Deployment — This question tests Deployment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS CodeDeploy with CloudWatch alarms — AWS CodeDeploy natively supports canary deployments for Amazon ECS, allowing you to specify a traffic shift percentage (e.g., 10%) and integrate with CloudWatch alarms to automatically trigger a rollback when error rates exceed a defined threshold (e.g., 1% over 5 minutes). This combination directly fulfills the gradual traffic shifting and automated rollback requirements without custom scripting.
What should I do if I get this CV0-004 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
This CV0-004 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CV0-004 exam.
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