Your company migrated its production environment into AWS VPC 6 months ago. As a cloud architect, you must revise the infrastructure and ensure that it is cost-effective in the long term. More than 50 EC2 instances are up and running all the time to support the business operation. What can you do to lower the cost?

Answer options:

A.Reserved instances
B.On-demand instances
C.Spot instances
D.Regular instances

Correct Answer – A
When you have instances that will be used continuously and throughout the year, the best option is to buy reserved instances. By buying reserved instances, you actually allocate an instance for the entire year or the duration you specify with a reduced cost.
To understand more on reserved instances, please visit the below URL-
https://aws.amazon.com/ec2/pricing/reserved-instances/