- A
Use AWS CodeDeploy with a canary deployment strategy that shifts 10% of traffic to the new version for 5 minutes, then shifts the remaining 90%. Configure a CloudWatch alarm to automatically roll back if error rates exceed 2%.
Canary deployment allows gradual traffic shifting and automatic rollback via CloudWatch alarms.
- B
Use AWS Lambda function aliases with weighted alias traffic shifting. Update the weights manually and monitor error rates using CloudWatch. Roll back by reverting the alias weights.
Why wrong: Weighted alias shifting is manual; no automatic rollback mechanism.
- C
Use AWS CodeDeploy with a linear deployment strategy that shifts 10% of traffic every 5 minutes. Configure a CloudWatch alarm to monitor error rates and manually roll back if needed.
Why wrong: Linear strategy shifts traffic linearly, but automatic rollback requires alarms; manual rollback is not automatic.
- D
Use AWS CodeDeploy with a blue/green deployment and an Application Load Balancer (ALB) to shift traffic to the new version. Configure CloudWatch alarms to trigger a rollback if errors exceed 5%.
Why wrong: Blue/green deployment with ALB is used for EC2/ECS, not Lambda. Lambda deployments use built-in traffic shifting.
DVA-C02 Deployment Practice Question
This DVA-C02 practice question tests your understanding of deployment. 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 deploying a new microservice on AWS Lambda behind an API Gateway. The development team wants to ensure that new versions of the Lambda function can be rolled out gradually and automatically rolled back if error rates exceed a threshold. Which deployment strategy should the team 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 canary deployment strategy that shifts 10% of traffic to the new version for 5 minutes, then shifts the remaining 90%. Configure a CloudWatch alarm to automatically roll back if error rates exceed 2%.
Option C is correct because AWS CodeDeploy supports canary deployments with automatic rollback based on CloudWatch alarms. Option A is wrong because blue/green deployment with an NLB is more complex than needed and does not natively support gradual traffic shifting for Lambda. Option B is wrong because a linear deployment using CodeDeploy also works, but the question emphasizes automatic rollback based on error rates, which is more directly supported with canary alarms. Option D is wrong because manual traffic shifting via Route53 is not automated and does not provide automatic rollback.
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 canary deployment strategy that shifts 10% of traffic to the new version for 5 minutes, then shifts the remaining 90%. Configure a CloudWatch alarm to automatically roll back if error rates exceed 2%.
Why this is correct
Canary deployment allows gradual traffic shifting and automatic rollback via CloudWatch alarms.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Use AWS Lambda function aliases with weighted alias traffic shifting. Update the weights manually and monitor error rates using CloudWatch. Roll back by reverting the alias weights.
Why it's wrong here
Weighted alias shifting is manual; no automatic rollback mechanism.
- ✗
Use AWS CodeDeploy with a linear deployment strategy that shifts 10% of traffic every 5 minutes. Configure a CloudWatch alarm to monitor error rates and manually roll back if needed.
Why it's wrong here
Linear strategy shifts traffic linearly, but automatic rollback requires alarms; manual rollback is not automatic.
- ✗
Use AWS CodeDeploy with a blue/green deployment and an Application Load Balancer (ALB) to shift traffic to the new version. Configure CloudWatch alarms to trigger a rollback if errors exceed 5%.
Why it's wrong here
Blue/green deployment with ALB is used for EC2/ECS, not Lambda. Lambda deployments use built-in traffic shifting.
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.
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
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: Use AWS CodeDeploy with a canary deployment strategy that shifts 10% of traffic to the new version for 5 minutes, then shifts the remaining 90%. Configure a CloudWatch alarm to automatically roll back if error rates exceed 2%. — Option C is correct because AWS CodeDeploy supports canary deployments with automatic rollback based on CloudWatch alarms. Option A is wrong because blue/green deployment with an NLB is more complex than needed and does not natively support gradual traffic shifting for Lambda. Option B is wrong because a linear deployment using CodeDeploy also works, but the question emphasizes automatic rollback based on error rates, which is more directly supported with canary alarms. Option D is wrong because manual traffic shifting via Route53 is not automated and does not provide automatic rollback.
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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Last reviewed: Jun 20, 2026
This DVA-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 DVA-C02 exam.
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