Which of the following is a type of memory that can be written to and read from, but loses data when power is off? MCQ with Answer and Explanation

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Which of the following is a type of memory that can be written to and read from, but loses data when power is off?

A. ROM

B. EEPROM

C. Flash memory

D. RAM

Answer: Option D

Solution (By JKSSB Mock Tests)

RAM is volatile; it can be read and written, but contents are lost when power is turned off. EEPROM, flash, and ROM are non-volatile.

This question belongs to: Computer Memory and Storage Devices

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Question #1

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Which of the following is a characteristic of a hard disk's platter?

A. It is made of silicon

B. It is a non-removable part of an SSD

C. It stores data in flash cells

D. It rotates at a constant speed

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Correct Answer: Option D

Explanation:
Platters in a hard disk rotate at a constant speed (e.g., 7200 RPM). They are made of aluminum/glass with magnetic coating, not silicon, and are used in HDDs, not SSDs.

This question belongs to: Computer Memory and Storage Devices

Question #2

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Which of the following is a common file system used on flash drives?

A. All of the above

B. NTFS

C. FAT32

D. exFAT

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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 #3

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What is the name of the high-speed data transfer mechanism that allows specific hardware subsystems to access main system memory independently of the central processing unit?

A. Bus Mastering

B. Direct Memory Access (DMA)

C. Interrupt Request (IRQ)

D. Paging Protocol

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Correct Answer: Option B

Explanation:
DMA (Direct Memory Access) allows peripherals like network cards or graphics adapters to read/write directly to system RAM without routing the data through the CPU, reducing processor overhead.

This question belongs to: Computer Memory and Storage Devices

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