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 deployment pipeline for a microservices application on Amazon ECS using AWS CodePipeline. They want to implement a canary deployment strategy where a small percentage of traffic is routed to the new version before fully promoting it. Which AWS service or feature should they use to achieve this?
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 ECS blue/green deployment
AWS CodeDeploy with ECS blue/green deployment is the correct choice because it natively supports canary traffic shifting for Amazon ECS services. When integrated with AWS CodePipeline, CodeDeploy can route a small percentage of traffic (e.g., 10%) to the new task set, monitor it with CloudWatch alarms, and then automatically shift the remaining traffic after a specified interval. This is the only option that directly provides the canary deployment lifecycle within the ECS and CodePipeline context.
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 ECS Service Auto Scaling
Why it's wrong here
Auto Scaling adjusts the number of tasks, not traffic shifting between versions.
✗
Amazon Route 53 weighted routing
Why it's wrong here
Route 53 can distribute traffic across multiple endpoints, but it's not the native way for ECS service deployments.
✗
AWS App Mesh with traffic shifting
Why it's wrong here
App Mesh provides traffic splitting, but ECS natively integrates with CodeDeploy for canary deployments.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The DOP-C02 exam frequently reuses these exact scenarios with slightly different constraints.
✓AWS CodeDeploy with ECS blue/green deploymentCorrect answer▾✗Amazon ECS Service Auto ScalingWrong answer — click to see why▾
Why this is wrong here
Auto Scaling adjusts the number of tasks, not traffic shifting between versions.
✗Amazon Route 53 weighted routingWrong answer — click to see why▾
Why this is wrong here
Route 53 can distribute traffic across multiple endpoints, but it's not the native way for ECS service deployments.
✗AWS App Mesh with traffic shiftingWrong answer — click to see why▾
Why this is wrong here
App Mesh provides traffic splitting, but ECS natively integrates with CodeDeploy for canary deployments.
Analysis generated from the official DOP-C02blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Route 53 weighted routing (which operates at the DNS level and cannot shift traffic within a single ECS service) with the application-level traffic shifting needed for canary deployments, or they assume App Mesh is required when CodeDeploy already provides the native integration.
Detailed technical explanation
How to think about this question
Under the hood, CodeDeploy for ECS blue/green deployments creates a new task set with the updated task definition and attaches it to the target group. It uses the ECS deployment controller type 'CODE_DEPLOY' to manage the traffic shifting via the load balancer's target group weights, which can be adjusted in increments (e.g., 10% every 5 minutes) using a linear or canary configuration. A real-world scenario is when a team needs to validate a new microservice version with production traffic for a few minutes before full rollout, and CodeDeploy's built-in rollback capability on CloudWatch alarm failure ensures safety.
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.
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 with ECS blue/green deployment — AWS CodeDeploy with ECS blue/green deployment is the correct choice because it natively supports canary traffic shifting for Amazon ECS services. When integrated with AWS CodePipeline, CodeDeploy can route a small percentage of traffic (e.g., 10%) to the new task set, monitor it with CloudWatch alarms, and then automatically shift the remaining traffic after a specified interval. This is the only option that directly provides the canary deployment lifecycle within the ECS and CodePipeline context.
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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Question Discussion
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