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Exam question from Amazon's AWS Certified Developer - Associate DVA-C02

Question #: 200
Topic #: 1

[All AWS Certified Developer - Associate DVA-C02 Questions]

A company has a serverless application on AWS that uses a fleet of AWS Lambda functions that have aliases. The company regularly publishes new Lambda function by using an in-house deployment solution. The company wants to improve the release process and to use traffic shifting. A newly published function version should initially make available only to a fixed percentage of production users.

Which solution will meet these requirements?

A. Configure routing on the alias of the new function by using a weighted alias.
B. Configure a canary deployment type for Lambda.
C. Configure routing on the new versions by using environment variables.
D. Configure a linear deployment type for Lambda.

Show Suggested Answer

Suggested Answer: A 🗳️

by fordiscussionstwo at Oct. 6, 2023, 3:01 a.m.

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Digo30sp

Highly Voted 1 year, 8 months ago

Selected Answer: A

The correct answer is (A). Weighted aliases allow you to route traffic to different versions of a function based on weights that you assign. This allows you to implement a canary deployment, where you initially route a small percentage of your traffic to the new version of the function, and then gradually increase the percentage as you gain confidence in the new version.

upvoted 8 times

rimaSamir

1 year, 4 months ago

If we need Canary deployment, then why not B ? How you will use A in automated deployment?

upvoted 3 times

albert_kuo

8 months, 3 weeks ago

While canary deployments are a valid strategy for gradual rollouts, Lambda doesn't have a built-in "canary deployment type." This option is misleading and not applicable in the context of Lambda functions.

upvoted 1 times

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albert_kuo

10 months, 4 weeks ago

the key word is "fixed percentage"

upvoted 2 times

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65703c1

Most Recent 1 year ago

Selected Answer: A

A is the correct answer.

upvoted 1 times

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DeaconStJohn

1 year, 2 months ago

Selected Answer: B

I am struggling to see how the correct answer isn't canary. please feel free to enlighten me as I am at a loss how this question description is anything but canary

upvoted 1 times

DeaconStJohn

1 year, 2 months ago

is this question a case of what naming convention is used within Lambda service. i.e. Canary deployments via Weighted Aliases.

upvoted 1 times

DeaconStJohn

1 year, 2 months ago

Still very on the fence with this one. My key take aways are that the question says an in house deployment solution and not "codedeploy." By using weighted aliases we are in fact performing a canary deployments. Bitch of a question.

upvoted 1 times

ahadh7621

11 months ago

My thought process is this. They can't use Canary Deployment because that is specifically for AWS CodeDeploy: https://docs.aws.amazon.com/codedeploy/latest/userguide/deployment-configurations.html They are using an in-house deployment method, so AWS canary deployments aren't applicable. They can, however, use routing configuration on an alias to send a portion of traffic to a second function version. For example, you can reduce the risk of deploying a new version by configuring the alias to send most of the traffic to the existing version, and only a small percentage of traffic to the new version. https://docs.aws.amazon.com/lambda/latest/dg/configuration-aliases.html#configuring-alias-routing

upvoted 2 times

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KarBiswa

1 year, 3 months ago

Selected Answer: A

https://docs.aws.amazon.com/lambda/latest/dg/configuration-aliases.html#configuring-alias-routing:~:text=function%20version.%20For%20example%2C%20you%20can%20reduce%20the%20risk%20of%20deploying%20a%20new%20version%20by%20configuring%20the%20alias%20to%20send%20most%20of%20the%20traffic%20to%20the%20existing%20version%2C%20and%20only%20a%20small%20percentage%20of%20traffic%20to%20the%20new%20version.

upvoted 2 times

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NijeshT

1 year, 6 months ago

Answer is A. weighted aliases offer fixed, predefined percentages

upvoted 4 times

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fordiscussionstwo

1 year, 8 months ago

AAAAAAAAAAA

upvoted 4 times

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