- A
ecs:RegisterTaskDefinition, ecs:UpdateService, elasticloadbalancing:RegisterTargets
Why wrong: Incorrect. It includes elasticloadbalancing:RegisterTargets, which is not required because ECS handles target group registration. It also omits iam:PassRole, which is necessary for CodeDeploy to pass roles to ECS.
- B
ecs:RegisterTaskDefinition, elasticloadbalancing:RegisterTargets
Why wrong: Incorrect. It misses ecs:UpdateService to update the service with the new task set and iam:PassRole to pass roles.
- C
ecs:RegisterTaskDefinition, ecs:UpdateService, iam:PassRole
Correct. These three permissions are the minimum required for CodeDeploy: register task definition, update service, and pass roles.
- D
ecs:CreateService, ecs:UpdateService, elasticloadbalancing:RegisterInstancesWithLoadBalancer
Why wrong: Incorrect. It uses ecs:CreateService instead of ecs:RegisterTaskDefinition, and elasticloadbalancing:RegisterInstancesWithLoadBalancer is a legacy action not suitable for ECS blue/green.
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 is implementing a blue/green deployment strategy for an application running on Amazon ECS with AWS Fargate. The team wants to use AWS CodeDeploy to orchestrate the deployment. What is the minimum IAM permissions needed for CodeDeploy to register the new task set and shift traffic?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
ecs:RegisterTaskDefinition, ecs:UpdateService, iam:PassRole
The minimum IAM permissions required for AWS CodeDeploy to orchestrate a blue/green deployment on Amazon ECS with Fargate include ecs:RegisterTaskDefinition (to register the new task definition), ecs:UpdateService (to update the service to use the new task set), and iam:PassRole (to pass the task execution role and task role to ECS). The elasticloadbalancing:RegisterTargets is not required because CodeDeploy relies on ECS to register tasks with the load balancer. Therefore, option C is correct. Option A includes elasticloadbalancing:RegisterTargets which is not needed and omits iam:PassRole, making it insufficient. Option B misses both ecs:UpdateService and iam:PassRole. Option D uses ecs:CreateService (not needed) and a legacy load balancer action.
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.
- ✗
ecs:RegisterTaskDefinition, ecs:UpdateService, elasticloadbalancing:RegisterTargets
Why it's wrong here
Incorrect. It includes elasticloadbalancing:RegisterTargets, which is not required because ECS handles target group registration. It also omits iam:PassRole, which is necessary for CodeDeploy to pass roles to ECS.
- ✗
ecs:RegisterTaskDefinition, elasticloadbalancing:RegisterTargets
Why it's wrong here
Incorrect. It misses ecs:UpdateService to update the service with the new task set and iam:PassRole to pass roles.
- ✓
ecs:RegisterTaskDefinition, ecs:UpdateService, iam:PassRole
Why this is correct
Correct. These three permissions are the minimum required for CodeDeploy: register task definition, update service, and pass roles.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
ecs:CreateService, ecs:UpdateService, elasticloadbalancing:RegisterInstancesWithLoadBalancer
Why it's wrong here
Incorrect. It uses ecs:CreateService instead of ecs:RegisterTaskDefinition, and elasticloadbalancing:RegisterInstancesWithLoadBalancer is a legacy action not suitable for ECS blue/green.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often include iam:PassRole (thinking CodeDeploy needs to pass roles to ECS) or use legacy load balancer actions like RegisterInstancesWithLoadBalancer, but the correct permissions are specifically for ECS service updates and target group registration.
Detailed technical explanation
How to think about this question
In a blue/green deployment with ECS and CodeDeploy, the deployment controller creates a new task set (not a new service) and shifts traffic by updating the load balancer target group registrations. CodeDeploy uses the ecs:UpdateService action to trigger the service to use the new task set, and elasticloadbalancing:RegisterTargets is used to register the new tasks with the target group, while deregistering the old ones. A common subtlety is that CodeDeploy does not call ecs:CreateService because the service already exists; it only updates the service’s task set and traffic routing.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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: ecs:RegisterTaskDefinition, ecs:UpdateService, iam:PassRole — The minimum IAM permissions required for AWS CodeDeploy to orchestrate a blue/green deployment on Amazon ECS with Fargate include ecs:RegisterTaskDefinition (to register the new task definition), ecs:UpdateService (to update the service to use the new task set), and iam:PassRole (to pass the task execution role and task role to ECS). The elasticloadbalancing:RegisterTargets is not required because CodeDeploy relies on ECS to register tasks with the load balancer. Therefore, option C is correct. Option A includes elasticloadbalancing:RegisterTargets which is not needed and omits iam:PassRole, making it insufficient. Option B misses both ecs:UpdateService and iam:PassRole. Option D uses ecs:CreateService (not needed) and a legacy load balancer action.
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.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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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