Developer Team is working on an event driven application that needs to process data stored in the Amazon S3 bucket & notify multiple subscribers using Amazon SNS. Thus, a single topic is created in Amazon SNS & messages are pushed to multiple Amazon SQS queues subscribed to this topic. Which of the following is a correct statement with regards to messages sent to the Amazon SQS queue?

Answer options:

A.Each Queue will receive an identical message sent to that topic instantaneously.
B.Message sent to the topic will be evenly distributed among all the queues which have subscribed to this topic.
C.Each Queue will receive a message sent to that topic asynchronously with a time delay.
D.Messages sent to the topic will be visible to the queue, once processing of the message is completed by the first queue.

Correct Answer – A
When multiple Amazon SQS queues are subscribed to a single topic within an Amazon SNS, each queue will receive an identical message. This is useful for parallel independent processing of messaging.
Option B is incorrect as All the queues subscribed to the topic will not get an evenly distributed message. But all queues will have identical messages each time a message is pushed for a topic.
Option C is incorrect as there would be any time delay for receiving messages.
Option D is incorrect as All queue receives identical message & can start processing messages parallelly independent of other queues.
For more information on Fanout with Amazon SNS, refer to the following URL-
https://aws.amazon.com/getting-started/hands-on/send-fanout-event-notifications/