Which type of RAM needs to be constantly refreshed thousands of times per second to retain data? MCQ with Answer and Explanation

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Which type of RAM needs to be constantly refreshed thousands of times per second to retain data?

A. NVRAM

B. SRAM

C. DRAM

D. PRAM

Answer: Option C

Solution (By JKSSB Mock Tests)

Dynamic RAM (DRAM) stores data in capacitors which lose charge over time, hence it requires continuous refreshing to maintain data integrity.

This question belongs to: Computer Memory and Storage Devices

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Question #1

What is the typical capacity of a standard microSD card?

A. Up to 2 TB (standard SDXC)

B. Up to 512 GB (common)

C. Up to 2 GB

D. Up to 32 GB

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Correct Answer: Option B

Explanation:
MicroSD cards are available in many capacities; SDHC up to 32 GB, SDXC up to 2 TB, but common sizes in 2026 are 16, 32, 64, 128, 256, 512 GB. So 512 GB is a typical large capacity.

This question belongs to: Computer Memory and Storage Devices

Question #2

Which of the following is a characteristic of a memory module's form factor (e.g., DIMM, SO-DIMM)?

A. Physical size and pin count

B. Data transfer rate

C. Memory capacity

D. Voltage

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Correct Answer: Option A

Explanation:
Form factor defines the physical dimensions and number of pins of the memory module, affecting compatibility.

This question belongs to: Computer Memory and Storage Devices

Question #3

What is the function of the 'system clock' in relation to memory?

A. It controls the timing of data transfer between CPU and memory

B. It measures the amount of memory used

C. It determines the memory capacity

D. It allocates memory to processes

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Correct Answer: Option A

Explanation:
The system clock provides a timing signal that synchronizes the operations of the CPU, memory, and other components, coordinating data transfers.

This question belongs to: Computer Memory and Storage Devices

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