What does the term 'double buffering' refer to in memory management? MCQ with Answer and Explanation

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What does the term 'double buffering' refer to in memory management?

A. Using two buffers to overlap I/O and processing

B. Storing two copies of data for redundancy

C. Using two levels of cache

D. Using two separate memory banks

Answer: Option A

Solution (By JKSSB Mock Tests)

Double buffering uses two buffers: one is being filled/read while the other is being processed, allowing overlap and reducing wait times.

This question belongs to: Computer Memory and Storage Devices

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Question #1

Which of the following is a valid memory unit in the SI system?

A. Gigabit

B. All of the above

C. Kilobit

D. Megabyte

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Correct Answer: Option B

Explanation:
Bits and bytes with SI prefixes (kilo, mega, giga) are all valid units. However, in computing, binary multiples are more common for memory capacities.

This question belongs to: Computer Memory and Storage Devices

Question #2

What is the purpose of a hard disk's actuator arm?

A. To control the spindle motor

B. To move the read/write head across the platter

C. To hold the platters

D. To rotate the platter

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Correct Answer: Option B

Explanation:
The actuator arm positions the read/write heads over the correct track on the platter. It moves the heads radially across the disk surface.

This question belongs to: Computer Memory and Storage Devices

Question #3

Which of the following is a type of non-volatile memory that is commonly used in SSDs?

A. DRAM

B. SDRAM

C. NAND flash

D. EPROM

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Correct Answer: Option C

Explanation:
NAND flash is the primary storage technology used in SSDs, offering high capacity, fast access, and non-volatility.

This question belongs to: Computer Memory and Storage Devices

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