AWS Certified Solutions Architect – Associate (SAA-C02) — Question 223

An application is running on an Amazon EC2 instance and must have millisecond latency when running the workload. The application makes many small reads and writes to the file system, but the file system itself is small.
Which Amazon Elastic Block Store (Amazon EBS) volume type should a solutions architect attach to their EC2 instance?

Answer options

• A. Cold HDD (sc1)
• B. General Purpose SSD (gp2)
• C. Provisioned IOPS SSD (io1)
• D. Throughput Optimized HDD (st1)

Correct answer: C

Explanation

The correct answer is C, Provisioned IOPS SSD (io1), as it is specifically designed for applications that require high IOPS and low latency. The other options like A (Cold HDD) and D (Throughput Optimized HDD) are intended for bulk storage and are not optimized for low-latency workloads, while B (General Purpose SSD) offers moderate performance but may not meet the stringent latency requirements of the application.