What is the function of the memory management unit (MMU) in virtual memory? MCQ with Answer and Explanation

What is the function of the memory management unit (MMU) in virtual memory?
A. To manage cache memory
B. To allocate disk space
C. To translate virtual addresses to physical addresses
D. To control the memory bus
Answer: Option C
Solution (By JKSSB Mock Tests)
The MMU performs address translation from virtual addresses used by programs to physical addresses in RAM, enabling virtual memory.

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Practice More Memory and Storage Devices Questions

Question #1
What is the typical speed of a Blu-ray drive at 6x?
A. 27 MB/s
B. 216 MB/s
C. 72 MB/s
D. 33 MB/s

Correct Answer: Option A


Explanation:
1x Blu-ray = 4.5 MB/s (36 Mbps). 6x = 6 * 4.5 = 27 MB/s.

This question belongs to: Computer Memory and Storage Devices
Question #2
Which problem occurs when software applications continuously allocate memory space in RAM but fail to release it back to the operating system after finishing their tasks?
A. Memory Leak
B. Cache Truncation
C. Buffer Overflow
D. Disk Defragmentation

Correct Answer: Option A


Explanation:
A memory leak happens when a program allocates memory space from the system heap but fails to free it up after use, reducing available RAM until the system slows down or crashes.

This question belongs to: Computer Memory and Storage Devices
Question #3
What is the primary difference between a CD and a DVD?
A. CDs store more data than DVDs
B. DVDs use a shorter wavelength laser, allowing higher density
C. CDs are read-only; DVDs are rewritable
D. DVDs are older technology

Correct Answer: Option B


Explanation:
DVDs use a shorter wavelength laser (650 nm vs 780 nm for CDs), which allows smaller pits and tighter tracks, resulting in higher storage capacity (4.7 GB vs 700 MB).

This question belongs to: Computer Memory and Storage Devices