Which of the following is an example of primary storage? MCQ with Answer and Explanation

Which of the following is an example of primary storage?
A. Hard disk
B. Pen drive
C. RAM
D. CD-ROM
Answer: Option C
Solution (By JKSSB Mock Tests)
Primary storage (or main memory) includes RAM and cache, which are directly accessible by the CPU. Secondary storage includes hard disks, optical discs, and pen drives.

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Practice More Memory and Storage Devices Questions

Question #1
Which structural component of flash memory traps electrons to represent binary ones and zeros?
A. Mechanical relay
B. Floating Gate Transistor
C. Magnetic core
D. Capacitor bank

Correct Answer: Option B


Explanation:
Flash memory uses floating gate transistors to trap electrical charges (electrons). The presence or absence of charge alters voltage thresholds, representing 0 or 1.

This question belongs to: Computer Memory and Storage Devices
Question #2
What is the typical speed of a 5400 RPM hard disk in terms of average latency?
A. 5.56 ms
B. 4.17 ms
C. 11.11 ms
D. 8.33 ms

Correct Answer: Option A


Explanation:
At 5400 RPM, one rotation takes 60/5400 = 0.01111 seconds = 11.11 ms. Average rotational latency is half of that, about 5.56 ms.

This question belongs to: Computer Memory and Storage Devices
Question #3
What is the role of a memory management unit (MMU)?
A. To handle disk I/O
B. To manage cache memory
C. To translate virtual addresses to physical addresses
D. To increase the memory capacity

Correct Answer: Option C


Explanation:
The MMU is a hardware component that translates virtual memory addresses used by the CPU into physical addresses in RAM, enabling virtual memory and protection.

This question belongs to: Computer Memory and Storage Devices