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CS Professional · Artificial Intelligence, Data Analytics and Cyber Security - Laws and Practice · Computer Hardware and Software

Mehta Traders' accountant switches off the office server during a power cut. Files that were open and unsaved are lost, while files saved on the disk remain intact. Which hardware characteristic explains this?

RAM is volatile main memory that loses its contents when power is cut, so unsaved open files vanish. The hard disk is non-volatile secondary storage and retains saved files without power, which explains the observed difference.

  1. AMain memory (RAM) is volatile, whereas hard disk storage is non-volatileCorrect
  2. BCache memory is non-volatile, whereas RAM is permanent
  3. CROM is volatile, whereas the hard disk is temporary
  4. DThe ALU stores all data permanently while power is on

Explanation

RAM holds data only while powered, so unsaved work is lost. Disks retain data without power. The option calling ROM volatile is wrong because ROM is non-volatile.

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