Amazon Exam DVA-C02 Topic 6 Question 18 Discussion

Actual exam question for Amazon's DVA-C02 exam

Question #: 18
Topic #: 6

A developer is building a serverless application by using AWS Serverless Application Model (AWS SAM) on multiple AWS Lambda functions.

When the application is deployed, the developer wants to shift 10% of the traffic to the new deployment of the application for the first 10 minutes after deployment. If there are no issues, all traffic must switch over to the new version.

Which change to the AWS SAM template will meet these requirements?

ASet the Deployment Preference Type to Canary10Percent10Minutes. Set the AutoPublishAlias property to the Lambda alias.

BSet the Deployment Preference Type to LinearlOPercentEvery10Minutes. Set AutoPubIishAIias property to the Lambda alias.

CSet the Deployment Preference Type to CanaryIOPercentIOMinutes. Set the PreTraffic and PostTraffic properties to the Lambda alias.

DSet the Deployment Preference Type to LinearlOPercentEveryIOMinutes. Set PreTraffic and Post Traffic properties to the Lambda alias.

Show Suggested Answer

Suggested Answer: A

The AWS Serverless Application Model (AWS SAM) comes built-in with CodeDeploy to provide gradual AWS Lambda deployments1. TheDeploymentPreferenceproperty in AWS SAM allows you to specify the type of deployment that you want. TheCanary10Percent10Minutesoption means that 10 percent of your customer traffic is immediately shifted to your new version.After 10 minutes, all traffic is shifted to the new version1.TheAutoPublishAliasproperty in AWS SAM allows AWS SAM to automatically create an alias that points to the updated version of the Lambda function1. Therefore, option A is correct.

by Corinne at Dec 22, 2023, 05:26 AM

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Kirk

8 months ago

I think we can safely rule out C and D. Let's go with A - Canary10Percent10Minutes. Sounds like the best fit for the given requirement.

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Maybelle

7 months ago

Great choice! Now we just need to deploy and test the new version of the application.

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Jaime

7 months ago

Canary10Percent10Minutes will allow us to safely shift 10% of the traffic initially.

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Rima

8 months ago

I think we have made the right decision by choosing option A.

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Vivan

8 months ago

Setting the AutoPublishAlias property to the Lambda alias will ensure all traffic switches over if there are no issues.

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Art

8 months ago

Let's go ahead with setting the Deployment Preference Type to Canary10Percent10Minutes.

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Garry

8 months ago

It makes sense to use Canary10Percent10Minutes for this scenario.

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Keshia

8 months ago

I agree, A seems like the most appropriate choice for the traffic shifting method.

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Felicitas

8 months ago

Agreed, A is the way to go. Now let's just hope the actual exam question is as straightforward as this one!

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Reuben

8 months ago

Exactly, the question is specifically asking about the traffic shifting mechanism, not the pre/post-deployment checks. So C and D are not the right answers.

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