AWS Certified SysOps Administrator – Associate (legacy) — Question 384

In order to optimize performance for a compute cluster that requires low inter-node latency, which feature in the following list should you use?

Answer options

• A. AWS Direct Connect
• B. Placement Groups
• C. VPC private subnets
• D. EC2 Dedicated Instances
• E. Multiple Availability Zones

Correct answer: B

Explanation

Placement Groups (specifically cluster placement groups) enable logical grouping of instances within a single Availability Zone to achieve low-latency, high-throughput network performance. Other options, such as AWS Direct Connect or VPC private subnets, do not address localized, high-speed physical network clustering. Deploying instances across Multiple Availability Zones would actually increase latency rather than reduce it.