A company has a workflow that sends video files from their on-premise system to AWS for transcoding. They use EC2 worker instances that pull transcoding jobs from SQS. As an architect, you need to design how the SQS service would be used in this architecture to achieve high throughput. Which of the following is the ideal way in which the SQS service should be used?
 

Answer options:

A.SQS should be used to guarantee high throughput because of the order of messages.
B.SQS should be used to synchronously manage the transcoding output.
C.SQS should be used to check the health of the worker instances.
D.SQS should be used to facilitate horizontal scaling

Answer – D
The AWS Documentation mentions the following.
Amazon Simple Queue Service (Amazon SQS) offers a secure, durable, and available hosted queue that lets you integrate and decouple distributed software systems and components. 
Option A is incorrect since the ordering of messages won`t help to achieve high throughput.
Options B and C are incorrect since these are not the responsibility of the SQS queue.
For more information on AWS SQS Horizontal Scaling, please visit the below URL-
https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-throughput-horizontal-scaling-and-batching.html#horizontal-scaling