- A
Use AWS CodeDeploy with a blue/green deployment configuration on the ECS service, and configure automatic rollback when CloudWatch alarms are breached.
CodeDeploy supports blue/green deployments on ECS with automatic rollback based on alarms.
- B
Use AWS CloudFormation with a ChangeSet and a custom rollback Lambda function triggered by CloudWatch alarms.
Why wrong: CloudFormation does not have native blue/green deployment with automatic rollback for ECS.
- C
Use AWS CodeBuild to run a build that creates a new task definition, then update the ECS service manually, and use CloudWatch alarms to trigger a rollback via a Lambda function.
Why wrong: CodeBuild is not designed for deployment orchestration.
- D
Use Amazon ECS service auto scaling with step scaling policies based on CloudWatch alarms.
Why wrong: Auto scaling adjusts capacity, not deployment strategies.
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.
A DevOps engineer is designing a deployment pipeline for a microservices application on Amazon ECS. The team wants to use blue/green deployments with automatic rollback if CloudWatch alarms are triggered during the deployment. Which combination of services and configurations should the engineer 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
Use AWS CodeDeploy with a blue/green deployment configuration on the ECS service, and configure automatic rollback when CloudWatch alarms are breached.
Option D is correct because CodeDeploy supports blue/green deployments on ECS with automatic rollback based on CloudWatch alarms. Option A is wrong because ECS service auto scaling is for scaling, not deployment. Option B is wrong because CloudFormation does not natively support blue/green with automatic rollback based on alarms. Option C is wrong because CodeBuild is for building, not deploying.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 CodeDeploy with a blue/green deployment configuration on the ECS service, and configure automatic rollback when CloudWatch alarms are breached.
Why this is correct
CodeDeploy supports blue/green deployments on ECS with automatic rollback based on alarms.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Use AWS CloudFormation with a ChangeSet and a custom rollback Lambda function triggered by CloudWatch alarms.
Why it's wrong here
CloudFormation does not have native blue/green deployment with automatic rollback for ECS.
- ✗
Use AWS CodeBuild to run a build that creates a new task definition, then update the ECS service manually, and use CloudWatch alarms to trigger a rollback via a Lambda function.
Why it's wrong here
CodeBuild is not designed for deployment orchestration.
- ✗
Use Amazon ECS service auto scaling with step scaling policies based on CloudWatch alarms.
Why it's wrong here
Auto scaling adjusts capacity, not deployment strategies.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. 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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
SDLC Automation — This question tests SDLC Automation — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use AWS CodeDeploy with a blue/green deployment configuration on the ECS service, and configure automatic rollback when CloudWatch alarms are breached. — Option D is correct because CodeDeploy supports blue/green deployments on ECS with automatic rollback based on CloudWatch alarms. Option A is wrong because ECS service auto scaling is for scaling, not deployment. Option B is wrong because CloudFormation does not natively support blue/green with automatic rollback based on alarms. Option C is wrong because CodeBuild is for building, not deploying.
What should I do if I get this DOP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
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Last reviewed: Jun 20, 2026
This DOP-C02 practice question is part of Courseiva's free Amazon Web Services 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 DOP-C02 exam.
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