What is the primary function of a memory cache? MCQ with Answer and Explanation

Question
What is the primary function of a memory cache?
A. To provide backup storage
B. To increase the memory capacity
C. To reduce the effective memory access time
D. To store the operating system
Answer: Option C
Solution (By JKSSB Mock Tests)
Cache memory holds frequently accessed data and instructions to reduce the average time to access data from main memory, thus improving system performance.
This question belongs to: Computer Memory and Storage Devices
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Practice More Memory and Storage Devices Questions

Question #1
Which type of flash memory is used in USB pen drives?
A. NOR flash
B. EPROM
C. EEPROM
D. NAND flash
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Correct Answer: Option D

Explanation:
NAND flash memory is used in USB drives, SSDs, and memory cards due to its high density, faster write speeds, and lower cost per bit compared to NOR flash.
This question belongs to: Computer Memory and Storage Devices
Question #2
What is the physical medium used in a hard disk to store data?
A. Metallic tape
B. Polycarbonate layer
C. Aluminum or glass platters coated with magnetic material
D. Silicon chips
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Correct Answer: Option C

Explanation:
Hard disks use platters made of aluminum or glass, coated with a thin magnetic layer that stores data in the form of magnetized regions.
This question belongs to: Computer Memory and Storage Devices
Question #3
How many Kilobytes (KB) constitute exactly one Gigabyte (GB) in standard binary computing notation?
A. 1,024 KB
B. 512,000 KB
C. 1,048,576 KB
D. 1,000,000 KB
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Correct Answer: Option C

Explanation:
Since 1 MB = 1024 KB and 1 GB = 1024 MB, multiplying 1024 by 1024 gives exactly 1,048,576 Kilobytes in one Gigabyte.
This question belongs to: Computer Memory and Storage Devices
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