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Answer: Amazon EFS - Supports scalable file storage for multiple instances.
The correct answer is A, Amazon Elastic File System (Amazon EFS). EFS is a fully managed service that provides a simple, scalable, elastic file storage for use with AWS cloud services and on-premises resources. It allows you to create and use a file system that can be accessed from multiple EC2 instances, even across different Availability Zones, which is ideal for applications that require high availability and concurrent access to shared data. The other options do not meet the requirements: B, Amazon S3, is an object storage service and not designed for mounting file systems on EC2 instances; C, Amazon EBS, offers block storage that can only be attached to a single EC2 instance at a time; and D, Amazon FSx for Windows File Server, is for Windows-based file systems and not compatible with Linux instances.
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Which AWS service enables mounting a shared file system across multiple EC2 Linux instances and Availability Zones?
A
Amazon EFS - Supports scalable file storage for multiple instances.
B
Amazon S3 - Object storage, not suitable for mounting file systems on instances.
C
Amazon EBS - Provides persistent block storage, limited to single instance attachment.
D
Amazon FSx for Windows - Designed for Windows file systems, not compatible with Linux.
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