You need to install a 150 GB volume on an EC2 Instance for a new application. While the data in the volume is used less frequently with small peaks in the morning and evening, Which storage type would be the most cost-effective option for the given requirement?

Answer options:

A.Amazon EBS provisioned IOPS SSD.B.Amazon EBS Cold HDD.C.Amazon EBS General Purpose SSD.D.Amazon EFS.

Answer – B
The volume data is used infrequently, not throughout the day, and the question requires the MOST cost-effective storage type. So the preferred choice would be Amazon Cold HDD. Cold HDD is suitable for the following scenarios:
Throughput-oriented storage for data that is infrequently accessed.
Scenarios where the lowest storage cost is important.
The volume size of EBS Cold HDD is 125 GiB - 16 TiB. The database size is 150G and is suitable in this scenario.
Option D is incorrect because EFS is file storage, not block or volume storage.
Note: IOPS measures the number of reads and writes operations per second, while throughput measures the number of bits read or written per second.
References:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html
https://aws.amazon.com/ebs/features/