Which of the following is used as a primary storage device?
Tap an option to check yourself.
Answer: B) PROM
PROM (Programmable Read-Only Memory) is a type of ROM, and ROM is classified as primary memory. It stores information such as firmware that the computer needs.
Why not the others?
A. Magnetic drum: Used as primary memory in some early computers, so this option has historical ambiguity.
C. Floppy disk: Secondary storage device.
D. All of these: Incorrect because a floppy disk is secondary storage.
For your exam, choose B. PROM.
Source: Scan #36 page 9 Q411