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Which AWS storage type is shared, mountable as a network file system (NFS), and ideal for many EC2 instances reading and writing the SAME files concurrently?
AAmazon S3 Standard buckets accessed via REST
BAmazon DynamoDB tables
CAmazon EBS gp3 volumes attached to one instance
DAmazon EFS (Elastic File System)
Answer & Solution
Correct answer: D. Amazon EFS (Elastic File System)
EFS is the managed NFS file store — mounts on many EC2 / ECS / Lambda clients concurrently. EBS is per-instance block. S3 is object storage (no POSIX semantics). DynamoDB is NoSQL — not a filesystem.
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