AWS Certified Developer - Associate DVA-C02 — Topic 1 Question 292

Question

A developer is investigating an issue in part of a company's application. In the application, messages are sent to an Amazon Simple Queue Service (Amazon SQS) queue. The AWS Lambda function polls messages from the SQS queue and sends email messages by using Amazon Simple Email Service (Amazon SES). Users have been receiving duplicate email messages during periods of high traffic. Which reasons could explain the duplicate email messages? (Choose two.)

Accepted Answer

Correct answer: A, D. The correct answer is A, D. Option A: Standard SQS queues support at-least-once message delivery. Option D: The SQS queue's visibility timeout is lower than or the same as the Lambda function's timeout. AWS Lambda runs code without provisioning servers and scales automatically, which minimizes operational overhead. Amazon SQS is a fully managed message queue that decouples components and absorbs traffic spikes.

AWS Certified Developer - Associate DVA-C02 — Question 292