Which AWS service provides a shared file system that can be mounted by multiple Amazon EC2 instances?
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Correct answer: Amazon Elastic File System (Amazon EFS).
Why this is the answer
Amazon Elastic File System (Amazon EFS) is the correct answer because it is a scalable, elastic, cloud-native NFS file system that multiple Amazon EC2 instances can access concurrently. This shared access is crucial for applications requiring a common data source. AWS Direct Connect provides a dedicated network connection from your premises to AWS, not a shared file system. AWS Snowball Edge is a data migration and edge computing device, not a shared file system for EC2 instances. AWS Backup is a service for centralizing and automating data protection across AWS services, not a shared file system itself.
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