AWS Certified Solutions Architect – Professional — Question 899

A Solutions Architect is designing the storage layer for a recently purchased application. The application will be running on Amazon EC2 instances and has the following layers and requirements:
✑ Data layer: A POSIX file system shared across many systems.
✑ Service layer: Static file content that requires block storage with more than 100k IOPS.
Which combination of AWS services will meet these needs? (Choose two.)

Answer options

Correct answer: C, E

Explanation

Amazon EFS is a fully managed, shared file system that is POSIX-compliant, making it the ideal choice for the shared data layer across multiple Amazon EC2 instances. For the service layer, Amazon EC2 Ephemeral Storage (Instance Store) provides high-performance, low-latency block storage capable of delivering hundreds of thousands of IOPS, which is perfect for hosting static file content that does not require durable persistence. Amazon S3 is object storage and not POSIX-compliant, while standard EBS Provisioned IOPS volumes are typically more expensive and less performant for static content caching compared to instance store.