- A
AWS Lambda traffic shifting using aliases
Correct. Lambda aliases can be configured to shift traffic between versions gradually, enabling canary deployments without additional services.
- B
AWS CodeDeploy with an AWS Lambda deployment configuration
Why wrong: Incorrect. CodeDeploy is a service that orchestrates canary deployments, but it relies on Lambda aliases under the hood; using Lambda aliases directly is more fundamental and fits the 'feature' aspect of the question.
- C
AWS CloudFormation with UpdatePolicy attribute
Why wrong: Incorrect. CloudFormation's UpdatePolicy is designed for EC2 Auto Scaling groups and does not support Lambda canary deployments.
- D
AWS SAM with AutoPublishAlias and DeploymentPreference
Why wrong: Incorrect. SAM is a framework that uses CodeDeploy and Lambda aliases; it is not a service and adds complexity beyond the core feature of Lambda aliases.
DOP-C02 AWS Lambda alias Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. 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. A key principle to apply: aWS Lambda alias. 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 using AWS CodePipeline to deploy a serverless application. The application uses AWS Lambda functions and Amazon API Gateway. The engineer wants to implement a canary deployment strategy for the Lambda functions to reduce risk. Which AWS service or feature should be used to achieve this?
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
AWS Lambda traffic shifting using aliases
For canary deployments of Lambda functions, the most direct AWS feature is Lambda aliases with traffic shifting, which allows you to gradually route traffic to a new version. While AWS CodeDeploy and AWS SAM can also achieve this, they are either additional services or frameworks that rely on Lambda aliases under the hood. The question asks for the service or feature that should be used, and Lambda aliases is the fundamental feature. Therefore, Option A is correct, while Options B and D are not the best answer because they add unnecessary complexity.
Key principle: AWS Lambda alias
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 Lambda traffic shifting using aliases
Why this is correct
Correct. Lambda aliases can be configured to shift traffic between versions gradually, enabling canary deployments without additional services.
Related concept
AWS Lambda alias
- ✗
AWS CodeDeploy with an AWS Lambda deployment configuration
Why it's wrong here
Incorrect. CodeDeploy is a service that orchestrates canary deployments, but it relies on Lambda aliases under the hood; using Lambda aliases directly is more fundamental and fits the 'feature' aspect of the question.
- ✗
AWS CloudFormation with UpdatePolicy attribute
Why it's wrong here
Incorrect. CloudFormation's UpdatePolicy is designed for EC2 Auto Scaling groups and does not support Lambda canary deployments.
- ✗
AWS SAM with AutoPublishAlias and DeploymentPreference
Why it's wrong here
Incorrect. SAM is a framework that uses CodeDeploy and Lambda aliases; it is not a service and adds complexity beyond the core feature of Lambda aliases.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap is that candidates may think only CodeDeploy or SAM are valid for canary deployments, but the core mechanism is Lambda aliases with traffic shifting, which is the most direct feature.
Detailed technical explanation
How to think about this question
Lambda alias routing uses a weighted distribution based on the 'routing config' property, where you specify version weights (e.g., v1: 90%, v2: 10%) and can optionally set pre-traffic and post-traffic hooks for validation. CodeDeploy integrates with Lambda by creating a deployment group that updates the alias's routing config in a controlled manner, supporting linear, canary, and all-at-once traffic shifts. In a real-world scenario, if the new version throws errors, CodeDeploy can automatically roll back by reverting the alias to point 100% to the previous version, minimizing user impact.
KKey Concepts to Remember
- AWS Lambda alias
- Canary deployment
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
AWS Lambda alias
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. AWS Lambda alias 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 aWS Lambda alias, then practise related DOP-C02 questions on the same topic to reinforce the concept.
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Configuration Management and IaC — study guide chapter
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Configuration Management and IaC — This question tests Configuration Management and IaC — AWS Lambda alias.
What is the correct answer to this question?
The correct answer is: AWS Lambda traffic shifting using aliases — For canary deployments of Lambda functions, the most direct AWS feature is Lambda aliases with traffic shifting, which allows you to gradually route traffic to a new version. While AWS CodeDeploy and AWS SAM can also achieve this, they are either additional services or frameworks that rely on Lambda aliases under the hood. The question asks for the service or feature that should be used, and Lambda aliases is the fundamental feature. Therefore, Option A is correct, while Options B and D are not the best answer because they add unnecessary complexity.
What should I do if I get this DOP-C02 question wrong?
Review aWS Lambda alias, then practise related DOP-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
AWS Lambda alias
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Last reviewed: Jul 4, 2026
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