AWS Certified SysOps Administrator – Associate (legacy) — Question 775

A placement group in Amazon EC2 can

Answer options

• A. place high memory instances in one logical group.
• B. logically name and tag different tiers of the system (DB, application, business logic etc).
• C. isolate any instance-type physically so that groups access local resources.
• D. reduce network latency and increase network throughput

Correct answer: D

Explanation

An Amazon EC2 cluster placement group enables instances to be physically located close to one another within a single Availability Zone, which significantly reduces network latency and increases network throughput. Other options describe tagging, logical grouping, or physical isolation concepts that do not represent the primary performance-oriented purpose of placement groups.