Which statement best describes data backup?

Which statement best describes data backup?

• A. A method to recover data from corruption without backups.
• B. A process of deleting old data to free up storage.
• C. A technique for optimizing query performance.
• D. Creating copies of data to restore after loss; ensures business continuity and data protection.

Answer: (D)

Backing up data is about creating copies of information so you can restore it after a loss. This practice protects important data and keeps operations going by giving you a recoverable version in case of hardware failure, accidental deletion, or security incidents like ransomware. The statement that best fits data backup describes creating copies of data to restore after loss and emphasizes ensuring business continuity and data protection, since it directly states both the action (creating copies) and the purpose (restoration and ongoing protection). The other descriptions miss the core purpose: deleting old data to free up storage relates to data lifecycle management, not backup; optimizing query performance deals with speed and efficiency, not safeguards for data; and recovery from corruption without backups misrepresents backup utility because backups provide the restore path after data loss or damage.

Backing up data is about creating copies of information so you can restore it after a loss. This practice protects important data and keeps operations going by giving you a recoverable version in case of hardware failure, accidental deletion, or security incidents like ransomware. The statement that best fits data backup describes creating copies of data to restore after loss and emphasizes ensuring business continuity and data protection, since it directly states both the action (creating copies) and the purpose (restoration and ongoing protection).

The other descriptions miss the core purpose: deleting old data to free up storage relates to data lifecycle management, not backup; optimizing query performance deals with speed and efficiency, not safeguards for data; and recovery from corruption without backups misrepresents backup utility because backups provide the restore path after data loss or damage.