Which of the following computer memory types are volatile? Choose the correct answer from the options given below.

1.CMOS memory

2.Cache memory

3.Flash memory

4.Hard disk

5.RAM

A1, 2 and 5 only

B1, 3 and 4 only

C2, 3 and 5 only

D2 and 5 only ✓ Correct

Correct answer: (D) 2 and 5 only

Explanation

Cache memory is volatile because it loses its contents as soon as power is cut.

RAM is volatile too, holding data only while the computer is powered.

CMOS memory is kept alive by a small battery, so it retains settings without main power.

Flash memory is non volatile and keeps data after power off, as in USB drives.

A hard disk stores data magnetically and holds it permanently without power.

Volatile memory offers speed while non volatile memory offers persistence.

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