Amazon Exam DVA-C02 Topic 3 Question 45 Discussion

Actual exam question for Amazon's DVA-C02 exam

Question #: 45
Topic #: 3

A banking company is building an application for users to create accounts, view balances, and review recent transactions. The company integrated an Amazon API Gateway REST API with AWS Lambda functions. The company wants to deploy a new version of a Lambda function that gives customers the ability to view their balances. The new version of the function displays customer transaction insights. The company wants to test the new version with a small group of users before deciding whether to make the feature available for all users. Which solution will meet these requirements with the LEAST disruption to users?

ACreate a canary deployment for the REST API. Gradually increase traffic to the new version of the function. Revert traffic to the old version if issues are detected.

BRedeploy the REST API stage to use the new version of the function. If issues are detected, update the REST API to point to the previous version of the function.

CDeploy the new version of the function to a new stage in the REST API. Route traffic to the new stage. If the new version fails, route traffic to the original stage.

DCreate a new REST API stage for the new version of the function. Create a weighted alias record set in Amazon Route 53 to distribute traffic between the original stage and the new stage.

Show Suggested Answer

Suggested Answer: A

API Gateway's canary deployments allow gradual traffic shifting to a new version of a function, minimizing disruption while testing.

Why Option A is Correct:

Gradual Rollout: Reduces risk by incrementally increasing traffic.

Rollback Support: Canary deployments make it easy to revert to the previous version.

Why Not Other Options:

Option B: Redeploying the stage disrupts all users.

Option C & D: Managing new stages and weighted routing introduces unnecessary complexity.

Canary Deployments in API Gateway

by Val at Jan 22, 2025, 02:19 PM

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23 days ago

I agree, C is the safest option. Gotta love those AWS features that make rolling out new versions a breeze.

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Keneth

2 days ago

I agree, C is the safest option. Gotta love those AWS features that make rolling out new versions a breeze.

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Noemi

3 days ago

Yeah, AWS definitely makes it easier to manage deployments. Can't go wrong with their features.

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Claudio

12 days ago

C) Deploy the new version of the function to a new stage in the REST API. Route traffic to the new stage. If the new version fails, route traffic to the original stage.

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Elly

13 days ago

I think C is the best option too. It's always good to have a backup plan.

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23 days ago

Option C seems like the way to go. Gradual rollout and easy revert if issues are detected.

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