AWS Certified Solutions Architect Professional SAP-C02 Practice Question

A single io2 Block Express volume can deliver up to 256 000 IOPS and 4 000 MB/s throughput while providing consistent sub-millisecond latency. Because the required 200 000 IOPS and 3.5 GB/s throughput fall within these limits, one io2 Block Express volume meets the workload's performance goals without the administrative overhead of striping multiple volumes. Provisioned-IOPS pricing for io2 Block Express drops to a lower tier above 64 000 IOPS, so the per-IOPS cost is lower than using multiple io1 volumes, which are capped at 64 000 IOPS each and are billed at a higher flat rate. Striping gp3 volumes cannot satisfy the 200 000-IOPS requirement, and st1 provides neither the necessary IOPS nor latency. Therefore, the single io2 Block Express volume is the simplest and most cost-effective choice.