Amazon DVA-C02 Exam - 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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Alberta

3 months ago

Why not just deploy it all at once? Seems risky otherwise.

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Carla

3 months ago

Option A is definitely the way to go!

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Colene

3 months ago

Wait, can we really revert that easily if something goes wrong?

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Fernanda

4 months ago

I agree, gradual traffic increase is smart.

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Dottie

4 months ago

A canary deployment sounds like the safest option!

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Yuki

4 months ago

I recall something about using Route 53 for traffic distribution, which makes option D interesting. But I’m not sure if it’s the best choice for this scenario.

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Maynard

4 months ago

I practiced a similar question where we had to route traffic to different stages. Option C seems like it could work, but I wonder if it’s as effective as a canary deployment.

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Lindsay

4 months ago

I'm not entirely sure, but I think option B might cause more downtime if we have to revert back. It feels riskier than the canary approach.

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Tamekia

5 months ago

I remember studying canary deployments, and I think option A sounds familiar. It seems like a safe way to test the new version with minimal disruption.

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Robt

5 months ago

Ah, I see. The question is asking for the least disruptive solution, so we'll want to avoid fully redeploying the API or creating a new stage. Canary deployments seem like the way to go here.

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Norah

5 months ago

Okay, I think I've got this. The key is to gradually roll out the new version to a subset of users, and have the ability to quickly revert if any issues are detected. Option A sounds like the best approach for that.

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Naomi

5 months ago

Hmm, I'm a bit unsure about the differences between the deployment options here. I'll need to review the details of each approach to make sure I understand the tradeoffs.

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Myra

5 months ago

This seems like a classic deployment strategy question. I'll need to carefully consider the options to determine the least disruptive solution.

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Diane

1 year ago

I prefer option D. Using weighted alias record set in Route 53 can help distribute traffic and minimize disruption if the new version fails.

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Nell

1 year ago

I agree with Frank. Canary deployment is a good way to test the new version without disrupting all users at once.

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Frank

1 year ago

I think option A is the best choice. Gradually increasing traffic to the new version will help identify any issues before full deployment.

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Hobert

1 year ago

Yikes, I just hope none of these candidates try to deploy the new version via carrier pigeon. That would be a real disruption!

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Amalia

1 year ago

Hmm, I'm torn between B and C. Both sound like they could work, but C just feels a bit more elegant.

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Jestine

1 year 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

1 year 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

1 year ago

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

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Claudio

1 year 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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