📊 Computer
Q. Which of the following is used for data backup?
  • (A) Cache
  • (B) CD/DVD
  • (C) RAM
  • (D) ALU
✅ Correct Answer: (B) CD/DVD

Explanation: CD/DVDs are used for storing backups or transferring data between systems.

Explanation by: Mr. Dubey
CD/DVDs are used for storing backups or transferring data between systems.

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