- A
Canary deployment with a CloudWatch alarm-based rollback
Lambda canary deployments shift traffic gradually and can roll back based on alarms.
- B
Rolling update with a pre-traffic hook
Why wrong: Lambda does not support rolling updates; it uses versioning and aliases.
- C
Immutable deployment with an automated rollback
Why wrong: Immutable deployments replace instances; Lambda uses version aliases for traffic shifting.
- D
Blue/Green deployment with an AWS CodeDeploy configuration
Why wrong: Blue/Green is a deployment strategy but Lambda's native traffic shifting is called canary.
Question 1,271 of 1,616
Lambda Canary Deployment with CloudWatch Alarm Rollback
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. A key principle to apply: canary deployment. 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 using AWS Lambda. The deployment pipeline uses AWS CodeBuild and AWS CodePipeline. The team wants to automatically roll back to the previous function version if the new version fails CloudWatch alarms. Which deployment strategy should they implement?
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
✓
Canary deployment with a CloudWatch alarm-based rollback
The correct answer is A: Canary deployment with a CloudWatch alarm-based rollback. AWS Lambda supports canary deployments via traffic shifting, where a small percentage of traffic is gradually shifted to the new function version. If the new version triggers CloudWatch alarms (e.g., increased error rate or latency), AWS CodeDeploy can automatically roll back to the previous version. Option B is incorrect because rolling updates are not natively supported for Lambda; Lambda uses traffic shifting instead. Option C is incorrect because immutable deployments do not provide gradual traffic shifting or alarm-based rollback. Option D is incorrect because Blue/Green deployment is a broader concept, but the specific strategy requested is canary with alarm-based rollback, which is a feature of AWS CodeDeploy's Lambda deployment.
Key principle: Canary deployment
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Canary deployment with a CloudWatch alarm-based rollback
Why this is correct
Lambda canary deployments shift traffic gradually and can roll back based on alarms.
Related concept
Canary deployment
- ✗
Rolling update with a pre-traffic hook
Why it's wrong here
Lambda does not support rolling updates; it uses versioning and aliases.
- ✗
Immutable deployment with an automated rollback
Why it's wrong here
Immutable deployments replace instances; Lambda uses version aliases for traffic shifting.
- ✗
Blue/Green deployment with an AWS CodeDeploy configuration
Why it's wrong here
Blue/Green is a deployment strategy but Lambda's native traffic shifting is called canary.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates may confuse 'Blue/Green' with 'Canary' because both involve two environments. However, AWS Lambda traffic shifting is officially called a 'canary deployment' when using gradual traffic shifts with alarm-based rollback.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Canary deployment
- CloudWatch alarm-based rollback
- AWS Lambda traffic shifting
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
Canary deployment
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. Canary deployment Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
What to study next
Got this wrong? Here's your next step.
Review canary deployment, then practise related DVA-C02 questions on the same topic to reinforce the concept.
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Deployment — study guide chapter
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Deployment — This question tests Deployment — Canary deployment.
What is the correct answer to this question?
The correct answer is: Canary deployment with a CloudWatch alarm-based rollback — The correct answer is A: Canary deployment with a CloudWatch alarm-based rollback. AWS Lambda supports canary deployments via traffic shifting, where a small percentage of traffic is gradually shifted to the new function version. If the new version triggers CloudWatch alarms (e.g., increased error rate or latency), AWS CodeDeploy can automatically roll back to the previous version. Option B is incorrect because rolling updates are not natively supported for Lambda; Lambda uses traffic shifting instead. Option C is incorrect because immutable deployments do not provide gradual traffic shifting or alarm-based rollback. Option D is incorrect because Blue/Green deployment is a broader concept, but the specific strategy requested is canary with alarm-based rollback, which is a feature of AWS CodeDeploy's Lambda deployment.
What should I do if I get this DVA-C02 question wrong?
Review canary deployment, then practise related DVA-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Canary deployment
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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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