AWS Certified SysOps Administrator – Associate (legacy) — Question 715

A block device is a storage device that moves data in sequences. How many types of block devices does Amazon EC2 support?

Answer options

• A. 2 -instance store volumes and EBS volumes
• B. 5 -General Purpose SSD, Provisioned IOPS SSD, Throughput Optimized HDD, Cold HDD, and Magnetic
• C. 3 -SSD, HDD, and Magnetic
• D. 1 -instance store volumes

Correct answer: A

Explanation

Amazon EC2 supports exactly two main types of block devices: Elastic Block Store (EBS) volumes and instance store volumes. EBS volumes offer durable, network-attached block storage that persists independently of the instance's life, whereas instance store volumes provide temporary block-level storage located on the physical host. Other choices represent specific sub-types or configurations of EBS volumes rather than the primary block device categories.