RAID stands for Redundant Array of Independent/Inexpensive Disks. Which property does RAID provide?

• A. Faster network routing
• B. Cloud integration
• C. Automatic data encryption
• D. Tolerant to a single disk failure

Answer: (C)

RAID's purpose is to provide redundancy so data stays accessible even if a drive fails. By spreading data across multiple disks with mirroring or parity, the array can be rebuilt or read from the remaining disks when one drive fails. That fault tolerance is the reason the correct property is tolerance to a single disk failure—RAID levels like RAID 1 and RAID 5 (and RAID 6, which can tolerate two failures) let you continue operating despite a failed disk. Encryption is not a built-in feature of RAID itself, though you can encrypt data on top of a RAID array; the core function of RAID is redundancy and reliability. Other options like faster network routing or cloud integration aren’t related to what RAID provides.