This DOP-C02 practice question tests your understanding of sdlc automation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 CI/CD pipeline for a microservices architecture. The pipeline must deploy to Amazon ECS using blue/green deployments. The team wants to automatically roll back if the new deployment fails health checks. Which combination of AWS services and configurations should the engineer use?
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 an ECS compute platform, configure a CloudWatch alarm for health checks, and enable automatic rollback.
Option D is correct because CodeDeploy with ECS supports blue/green deployments and automatic rollback on CloudWatch alarm. Option A is wrong because CodePipeline alone does not handle deployment rollback. Option B is wrong because CloudFormation does not natively support blue/green for ECS. Option C is wrong because Elastic Beanstalk is for web apps, not ECS.
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 an ECS compute platform, configure a CloudWatch alarm for health checks, and enable automatic rollback.
Why this is correct
CodeDeploy supports blue/green deployments for ECS and can automatically roll back based on CloudWatch alarms.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use AWS CloudFormation with a custom resource to perform blue/green deployment.
Why it's wrong here
Custom resources are complex and not the standard approach.
✗
Use AWS Elastic Beanstalk with blue/green environment swapping.
Why it's wrong here
Elastic Beanstalk is not for ECS.
✗
Use AWS CodePipeline with ECS deployment action and manual approval for rollback.
Why it's wrong here
Manual approval does not provide automatic rollback.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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.
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 an ECS compute platform, configure a CloudWatch alarm for health checks, and enable automatic rollback. — Option D is correct because CodeDeploy with ECS supports blue/green deployments and automatic rollback on CloudWatch alarm. Option A is wrong because CodePipeline alone does not handle deployment rollback. Option B is wrong because CloudFormation does not natively support blue/green for ECS. Option C is wrong because Elastic Beanstalk is for web apps, not ECS.
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.
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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.
Question Discussion
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