A company is migrating a legacy Linux application to AWS. The application requires a shared file system that can be accessed concurrently by hundreds of EC2 instances across multiple Availability Zones. The file system must be highly available and POSIX-compliant.<br/><br/>Which AWS storage service should be used?

Answer options:

Amazon Elastic Block Store (Amazon EBS)

Amazon S3

Amazon Elastic File System (Amazon EFS)

Amazon FSx for Windows File Server

How to approach this question

Look for 'Linux', 'shared file system', and 'multiple Availability Zones'.

Full Answer

C.Amazon Elastic File System (Amazon EFS)✓ Correct

Amazon EFS is a regional service storing data within and across multiple Availability Zones (AZs) for high availability and durability. It provides a standard file system interface and file system access semantics (POSIX).

Common mistakes

Choosing EBS, which is block storage and generally attached to a single instance.

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