Which of the following fall in the category of primary memory ?

1.ROM

2.RAM

3.Cache

4.HDD

5.SSD

A2, 3 & 4 only

B1, 3 & 5 only

C1, 2 & 4 only

D1, 2 & 3 only ✓ Correct

Correct answer: (D) 1, 2 & 3 only

Explanation

ROM, RAM and Cache are primary memory, directly accessible by the processor at high speed.

ROM holds firmware permanently and retains data when power is off.

RAM temporarily holds running programs and data for fast processor access.

Cache is a very fast small memory that stores frequently used data close to the processor.

HDD is a secondary storage device, not primary memory.

SSD is also secondary storage using flash memory, not primary memory.

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