Which statement best defines a FlexVol and its purpose in ONTAP?

• A. A protocol interface for data access.
• B. A physical disk group used to store RAID sets.
• C. A snapshot of a volume used for backups.
• D. A virtualized volume within an aggregate that hosts file systems and shares; can be resized independently.

Answer: (D)

FlexVol is a virtualized storage container inside an ONTAP aggregate. It acts as a logical volume that hosts file systems and shares, letting you carve out and manage storage independently for each volume. Because it’s not tied to a single physical disk—it's created within an aggregate—you can grow or shrink that specific FlexVol without affecting others, and you can apply quotas, snapshots, and protocol access (NFS/SMB/iSCSI) to it.

Other options describe different ONTAP concepts: a protocol interface is about how data is accessed over the network, a physical disk group used to store RAID sets forms an aggregate, and a snapshot is a point-in-time copy of a volume rather than the container itself.