Management Information System (MIS) Practice Exam

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Which technology is used for data recovery and backup, ensuring data redundancy?

RAID
Backup Tape
Flash memory
Cloud Storage

The correct answer is: RAID

RAID, which stands for Redundant Array of Independent Disks, is a technology specifically designed to enhance data redundancy and improve data recovery capabilities. It works by combining multiple hard drives into a single unit, allowing data to be stored across these drives. The primary purpose of RAID is to protect against data loss in the event of a hard drive failure. Different RAID levels provide various balances of redundancy, performance, and storage capacity. For example, RAID 1 mirrors data across two drives, while RAID 5 distributes data along with parity across three or more drives, allowing for the recovery of data even if one drive fails. This built-in redundancy is crucial for organizations that prioritize data availability and integrity. While backup tapes, flash memory, and cloud storage also serve as means for data backup or recovery, they do not inherently provide the same level of built-in redundancy that RAID offers. Backup tapes allow for storing backups physically but do not actively protect against real-time drive failures. Flash memory is primarily used for storage and speed rather than redundancy. Cloud storage can provide means for backup and recovery, but it does so through external systems rather than an integrated array of disks designed explicitly for redundancy like RAID.