The answer is AWS CodeDeploy, because it is the only service that natively supports canary and linear deployments for Lambda functions with automatic rollback triggered by CloudWatch alarms. CodeDeploy shifts traffic gradually to the new version and monitors the specified alarms; if an alarm breaches, it automatically reverts traffic to the previous version, ensuring safe serverless deployments. On the AWS Certified Developer Associate DVA-C02 exam, this question tests your understanding of deployment strategies for Lambda and the distinction between orchestration and deployment tools. A common trap is choosing CodePipeline, which orchestrates the pipeline but does not itself perform canary traffic shifting or alarm-based rollbacks—that is CodeDeploy’s job. Another trap is CloudFormation, which lacks native canary deployments for Lambda. Remember the mnemonic: “CodeDeploy Does Deployments and Rollbacks”—it’s the deployment engine, not the pipeline.
DVA-C02 Deployment Practice Question
This DVA-C02 practice question tests your understanding of deployment. 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 company wants to deploy a serverless application using AWS Lambda and API Gateway. The deployment process must support automatic rollbacks if the new version fails CloudWatch alarms. Which AWS service should be used to orchestrate this deployment?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS CodeDeploy
Option D is correct. AWS CodeDeploy can be used with Lambda to perform canary or linear deployments and automatically roll back based on CloudWatch alarms. Option A is wrong because CloudFormation does not natively support canary deployments or automatic rollback based on alarms for Lambda. Option B is wrong because AWS Elastic Beanstalk is for web applications, not serverless. Option C is wrong because AWS CodePipeline orchestrates build/test/deploy but does not handle canary deployments and rollback itself.
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.
✗
AWS Elastic Beanstalk
Why it's wrong here
Elastic Beanstalk is for container-based or web apps, not serverless Lambda.
✓
AWS CodeDeploy
Why this is correct
CodeDeploy supports Lambda canary/linear deployments and automatic rollback based on CloudWatch alarms.
Related concept
Static NAT maps one inside address to one outside address.
✗
AWS CloudFormation with a change set
Why it's wrong here
CloudFormation can update stack but does not support canary deployments or alarm-based rollback for Lambda.
✗
AWS CodePipeline
Why it's wrong here
CodePipeline orchestrates stages but does not handle canary deployment or alarm-based rollback directly.
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 DVA-C02 NAT questions on configuration and troubleshooting.
Deployment — This question tests Deployment — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: AWS CodeDeploy — Option D is correct. AWS CodeDeploy can be used with Lambda to perform canary or linear deployments and automatically roll back based on CloudWatch alarms. Option A is wrong because CloudFormation does not natively support canary deployments or automatic rollback based on alarms for Lambda. Option B is wrong because AWS Elastic Beanstalk is for web applications, not serverless. Option C is wrong because AWS CodePipeline orchestrates build/test/deploy but does not handle canary deployments and rollback itself.
What should I do if I get this DVA-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 DVA-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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Question Discussion
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