Exam AWS Certified Developer - Associate DVA-C02 topic 1 question 360 discussion

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

Question #: 360
Topic #: 1

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

A developer is building an ecommerce application. When there is a sale event, the application needs to concurrently call three third-party systems to record the sale. The developer wrote three AWS Lambda functions. There is one Lambda function for each third-party system, which contains complex integration logic.

These Lambda functions are all independent. The developer needs to design the application so each Lambda function will run regardless of others' success or failure.

Which solution will meet these requirements?

A. Publish the sale event from the application to an Amazon Simple Queue Service (Amazon SQS) queue. Configure the three Lambda functions to poll the queue.
B. Publish the sale event from the application to an Amazon Simple Notification Service (Amazon SNS) topic. Subscribe the three Lambda functions to be triggered by the SNS topic.
C. Publish the sale event from the application to an Application Load Balancer (ALB). Add the three Lambda functions as ALB targets.
D. Publish the sale event from the application to an AWS Step Functions state machine. Move the logic from the three Lambda functions into the Step Functions state machine.

Show Suggested Answer

Suggested Answer: B 🗳️

by kyowo at July 5, 2024, 4:46 p.m.

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tomchandler077

Highly Voted 5 months, 3 weeks ago

B Given the requirements to concurrently call three independent third-party systems when there is a sale event, and ensuring that each Lambda function runs regardless of the success or failure of the others, the best solution is to use Amazon Simple Notification Service (SNS).

upvoted 5 times

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albert_kuo

Most Recent 5 months ago

Selected Answer: B

1. create sns topic aws sns create-topic --name SaleEvents 2. create three lambda function to subscribe sns topic aws sns subscribe --topic-arn arn:aws:sns:region:account-id:SaleEvents --protocol lambda --notification-endpoint arn:aws:lambda:region:account-id:function:Function1 aws sns subscribe --topic-arn arn:aws:sns:region:account-id:SaleEvents --protocol lambda --notification-endpoint arn:aws:lambda:region:account-id:function:Function2 aws sns subscribe --topic-arn arn:aws:sns:region:account-id:SaleEvents --protocol lambda --notification-endpoint arn:aws:lambda:region:account-id:function:Function3

upvoted 3 times

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siheom

5 months, 2 weeks ago

Selected Answer: B

Definitely B

upvoted 1 times

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kyowo

5 months, 3 weeks ago

D is the correct answer