Permanent Memory of a computer is known as-
- A.RAM
- B.CD-ROM
- C.ROM
- D.CPU
Show answer
Correct answer: C. ROM
Explanation
The correct answer is C, ROM. Read Only Memory is the permanent or non-volatile memory of a computer: its contents are written once and survive when the power is switched off, which is why the BIOS firmware that starts the machine and runs the power-on self-test is stored in it. A is wrong because RAM, or Random Access Memory, is volatile temporary memory; everything in it is lost the moment power is removed, which is why unsaved work disappears in a power cut. B is wrong because a CD-ROM is an optical secondary storage medium that you insert and remove, not the permanent internal memory built into the machine; the question asks for the computer's own memory. D is wrong because the CPU is the processing unit and not a memory at all, although the registers inside it do store a few values while a calculation is running.