Your company has an application that takes care of uploading, processing, and publishing videos posted by users. The current architecture for this application includes the following:
a) A set of EC2 Instances to transfer user-uploaded videos to S3 buckets.
b) A set of EC2 worker processes to process and publish the videos.
c) An Auto Scaling Group for the EC2 worker processes.
Which of the following AWS Services can be added to the architecture to make it more integrated and decoupled?

Answer options:

A.Amazon SQS
B.Amazon SNS
C.Amazon CloudFront
D.Amazon SES

Correct Answer - A
Amazon SQS is used to decouple systems. It can store requests to process videos, to be picked up by the worker processes.
AWS Documentation mentions the following:
Amazon Simple Queue Service (Amazon SQS) offers a reliable, highly scalable, hosted queue for storing messages as they travel between applications or microservices. It moves data between distributed application components and helps you decouple these components.
Option B is incorrect because it is not used for decoupling.
Option C is incorrect because it does not use EC2 worker processes to process anything. It does not relate to the requirements.
Option D is incorrect because it is an email service.
For more information on AWS SQS, please visit the following URL:
https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/Welcome.html
https://aws.amazon.com/blogs/compute/running-cost-effective-queue-workers-with-amazon-sqs-and-amazon-ec2-spot-instances/