CompTIA Data+ DA0-002 (V2) Practice Question

Shared storage provides a single, concurrently accessible file system that handles concurrency and file locking for every connected host. A Network File System (NFS) share delivered from a NAS appliance is designed for this purpose; the file system lives on the NAS and can be mounted simultaneously by each cluster node, giving every server live, coordinated access to the same files.

Direct-attached NVMe drives are local (DAS); each server can see only its own disk, so data is not inherently shared. An Amazon S3 bucket is object storage exposed through REST APIs; it lacks the fully POSIX-compatible file-system semantics-such as file locking-expected by typical applications without additional layers. An iSCSI LUN presented separately to each server is block storage; unless a cluster-aware file system is added, simultaneous mounting risks data corruption and therefore does not satisfy the out-of-the-box shared-file-system requirement.

Because the NFS export inherently supports simultaneous, coordinated access from multiple hosts, it is the correct choice.