AWS Certified Solutions Architect – Associate (SAA-C02) — Question 272

A company is migrating a Linux-based web server group to AWS. The web servers must access files in a shared file store for some content. To meet the migration date, minimal changes can be made.
What should a solutions architect do to meet these requirements?

Answer options

• A. Create an Amazon S3 Standard bucket with access to the web server.
• B. Configure an Amazon CloudFront distribution with an Amazon S3 bucket as the origin.
• C. Create an Amazon Elastic File System (Amazon EFS) volume and mount it on all web servers.
• D. Configure Amazon Elastic Block Store (Amazon EBS) Provisioned IOPS SSD (io1) volumes and mount them on all web servers.

Correct answer: C

Explanation

Amazon Elastic File System (Amazon EFS) is a fully managed service that supports the NFSv4 protocol, allowing it to be mounted concurrently by multiple Linux-based EC2 instances with minimal configuration changes. Amazon S3 requires rewriting application code to use APIs for file access, which violates the minimal change constraint. Amazon EBS volumes are block-level storage and cannot be easily shared as a common concurrent file system across multiple independent web servers.