AWS Certified Solutions Architect – Associate (SAA-C03) — Question 493

A company is developing an application to support customer demands. The company wants to deploy the application on multiple Amazon EC2 Nitro-based instances within the same Availability Zone. The company also wants to give the application the ability to write to multiple block storage volumes in multiple EC2 Nitro-based instances simultaneously to achieve higher application availability.

Which solution will meet these requirements?

Answer options

• A. Use General Purpose SSD (gp3) EBS volumes with Amazon Elastic Block Store (Amazon EBS) Multi-Attach
• B. Use Throughput Optimized HDD (st1) EBS volumes with Amazon Elastic Block Store (Amazon EBS) Multi-Attach
• C. Use Provisioned IOPS SSD (io2) EBS volumes with Amazon Elastic Block Store (Amazon EBS) Multi-Attach
• D. Use General Purpose SSD (gp2) EBS volumes with Amazon Elastic Block Store (Amazon EBS) Multi-Attach

Correct answer: C

Explanation

Amazon EBS Multi-Attach is supported exclusively on Provisioned IOPS SSD (io1 and io2) volumes, which allows attaching a single volume to multiple Nitro-based EC2 instances within the same Availability Zone. Other volume types, such as gp2, gp3, and st1, do not support this capability. Therefore, using io2 volumes with Multi-Attach is the only valid configuration that meets the requirements.