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

What is the primary function of a memory cache?
A. To reduce the effective memory access time
B. To increase the memory capacity
C. To store the operating system
D. To provide backup storage
Answer: Option A
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.

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Practice More Memory and Storage Devices Questions

Question #1
Which of the following is a common file system used on flash drives?
A. All of the above
B. exFAT
C. NTFS
D. FAT32

Correct Answer: Option A


Explanation:
Flash drives can be formatted with various file systems including FAT32, exFAT, and NTFS, depending on compatibility and file size requirements.

This question belongs to: Computer Memory and Storage Devices
Question #2
Which of the following is a type of RAM that uses a clock signal to synchronize its operations?
A. SRAM
B. SDRAM
C. FPM DRAM
D. DRAM

Correct Answer: Option B


Explanation:
SDRAM (Synchronous DRAM) synchronizes with the system clock, allowing it to accept commands on every clock cycle, improving performance over asynchronous DRAM.

This question belongs to: Computer Memory and Storage Devices
Question #3
A standard double-layer DVD can store approximately how much data?
A. 700 MB
B. 25 GB
C. 4.7 GB
D. 8.5 GB

Correct Answer: Option D


Explanation:
A standard single-layer DVD stores 4.7 GB, while a dual-layer or double-layer DVD can store up to 8.5 GB of data.

This question belongs to: Computer Memory and Storage Devices