AWS Certified Solutions Architect – Associate (SAA-C02) — Question 236

A company runs a high performance computing (HPC) workload on AWS. The workload required low-latency network performance and high network throughput with tightly coupled node-to-node communication. The Amazon EC2 instances are properly sized for compute and storage capacity, and are launched using default options.
What should a solutions architect propose to improve the performance of the workload?

Answer options

• A. Choose a cluster placement group while launching Amazon EC2 instances.
• B. Choose dedicated instance tenancy while launching Amazon EC2 instances.
• C. Choose an Elastic Inference accelerator while launching Amazon EC2 instances.
• D. Choose the required capacity reservation while launching Amazon EC2 instances.

Correct answer: A

Explanation

Choosing a cluster placement group optimizes low-latency and high-throughput networking by placing instances physically close together in the data center. The other options, such as dedicated instance tenancy and Elastic Inference, do not specifically address the network performance needs of tightly coupled HPC workloads, and capacity reservations are related to instance availability rather than performance enhancements.