Which of the following is a type of memory that is used to store the operating system? MCQ with Answer and Explanation

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Which of the following is a type of memory that is used to store the operating system?

A. Hard disk

B. RAM

C. ROM

D. Cache

Answer: Option B

Solution (By JKSSB Mock Tests)

The operating system is loaded from secondary storage (hard disk) into RAM (primary storage) for execution. During execution, it resides in RAM.

This question belongs to: Computer Memory and Storage Devices

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Question #1

What is the memory hierarchy order from fastest to slowest?

A. RAM, Cache, Registers, Hard disk

B. Registers, Cache, RAM, Hard disk

C. Hard disk, RAM, Cache, Registers

D. Cache, Registers, RAM, Hard disk

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Correct Answer: Option B

Explanation:
The memory hierarchy from fastest to slowest is typically: Registers (fastest), then Cache, then RAM (main memory), then secondary storage like Hard disk (slowest).

This question belongs to: Computer Memory and Storage Devices

Question #2

What is the function of a sector on a hard disk?

A. A single track on the disk

B. A basic unit of storage on the disk

C. A storage area for file metadata

D. A collection of cylinders

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Correct Answer: Option B

Explanation:
A sector is the smallest unit of data that can be read or written on a hard disk, typically 512 bytes or 4 KB in modern drives.

This question belongs to: Computer Memory and Storage Devices

Question #3

What is the function of a memory controller's command scheduler?

A. To reorder commands for better performance

B. To decode commands

C. To generate clock signals

D. To handle power management

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Correct Answer: Option A

Explanation:
The command scheduler in a memory controller reorders commands to maximize bus utilization and reduce latency.

This question belongs to: Computer Memory and Storage Devices

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