AWS Certified Cloud Practitioner — Question 695

A company wants to migrate its high performance computing (HPC) application to Amazon EC2 instances. The application has multiple components. The application must have fault tolerance and must have the ability to fail over automatically.

Which AWS infrastructure solution will meet these requirements with the LEAST latency between components?

Answer options

• A. Multiple AWS Regions
• B. Multiple edge locations
• C. Multiple Availability Zones
• D. Regional edge caches

Correct answer: C

Explanation

Deploying the application across multiple Availability Zones within a single Region provides high availability and automatic failover while maintaining the lowest possible latency between EC2 instances. In contrast, using multiple AWS Regions would introduce significant geographic latency that is detrimental to HPC workloads. Edge locations and regional edge caches are optimized for content delivery via Amazon CloudFront and are not suitable for hosting low-latency, multi-component EC2 applications.