A company has EC2 instances running in AWS. The EC2 instances are running in an Auto Scaling group. There are a lot of requests being lost because of the load on the servers. The Auto Scaling group is launching new instances to take the load but there are still some requests that are lost. Which of the following would provide the most cost-effective solution to avoid losing the submitted requests? Choose the correct answer from the options given below

Answer options:

A.Use an SQS queue to decouple the application components. Put the requests in the SQS queue and pull the messages from the queue for further processing in the EC2 instances.
B.Keep one extra EC2 instance always powered on.
C.Use larger instances for your application.
D.Pre-warm your Elastic Load Balancer.

Answer - A
Amazon Simple Queue Service (SQS) is a fully-managed message queuing service for reliably communicating among distributed software components and microservices - at any scale. Building applications from individual components that each perform a discrete function improves scalability and reliability, and is best practice design for modern applications.
For more information on SQS, please refer to the below link:
https://aws.amazon.com/sqs/