You are working as an AWS architect in your organization. An application is being developed on an AWS EC2 instance and would need a local volume with low latency to handle database workloads. They figured out the Provisioned IOPS SSD volume type suits best. However, when the application team is launching an EC2 instance, they found an option named “EBS-optimized.” They reached out to you asking the purpose of EBS optimized instances. What do you suggest?

Answer options:

A.Amazon EBS–optimized instance provides additional, dedicated capacity for Amazon EBS I/O.
B.Amazon EBS-optimized instance comes with instance store ephemeral storage which provides faster throughput.
C.EBS-optimized is a configuration on the EBS volume, not an option on EC2 instance.
D.Amazon EBS-optimized instances cannot have Provisioned IOPS SSD volume types. They only work with General Purpose SSD, Throughput optimized HDD, Cold HDD

Answer: A
An Amazon EBS–optimized instance uses an optimized configuration stack and provides additional, dedicated capacity for Amazon EBS I/O. This optimization provides the best performance for your EBS volumes by minimizing contention between Amazon EBS I/O and other traffic from your instance.
EBS–optimized instances deliver dedicated bandwidth to Amazon EBS, with options between 425 Mbps and 14,000 Mbps, depending on the instance type you use. When attached to an EBS–optimized instance, General Purpose SSD (gp2) volumes are designed to deliver within 10% of their baseline and burst performance 99% of the time in a given year. Provisioned IOPS SSD (io1) volumes are designed to deliver within 10% of their provisioned performance 99.9% of the time in a given year. Both Throughput Optimized HDD (st1) and Cold HDD (sc1) guarantee performance consistency of 90% of burst throughput 99% of the time in a given year. Non- compliant periods are approximately uniformly distributed, targeting 99% of the expected total throughput each hour.
For more information on EBS-optimized instances, refer to the documentation here. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSOptimized.html