Which of the following is true about DRAM? MCQ with Answer and Explanation

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Which of the following is true about DRAM?

A. It is static and does not need refresh

B. It uses flip-flops to store data

C. It is slower than SRAM but cheaper

D. It is non-volatile

Answer: Option C

Solution (By JKSSB Mock Tests)

DRAM is slower than SRAM because of refresh cycles, but it is cheaper and denser, making it suitable for main memory. It is volatile and uses capacitors.

This question belongs to: Computer Memory and Storage Devices

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Practice More Memory and Storage Devices Questions

Question #1

Which storage device class connects externally to a computer via a universal serial interface and uses flash memory?

A. USB Pen Drive

B. Internal HDD

C. Floppy Disk

D. Zip Drive

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Correct Answer: Option A

Explanation:
A USB pen drive (or flash drive) is an external plug-and-play storage device that uses non-volatile NAND flash memory to interface via USB ports.

This question belongs to: Computer Memory and Storage Devices

Question #2

Which operational characteristic distinguishes a 'Cold Boot' from a 'Warm Boot' regarding system memory?

A. A cold boot requires cooling the RAM modules manually with specialized fans.

B. A warm boot systematically reformats the secondary storage partitions.

C. A cold boot starts from a complete zero-power state, completely clearing all volatile memory contents.

D. A cold boot bypasses the execution of the BIOS firmware instructions completely.

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Correct Answer: Option C

Explanation:
A cold boot involves turning on a computer from a powered-off state, initializing all hardware and starting with cleared volatile memory, whereas a warm boot simply restarts the OS without cutting hardware power.

This question belongs to: Computer Memory and Storage Devices

Question #3

What is the typical seek time for a consumer 7200 RPM hard drive?

A. About 50 ms

B. About 0.1 ms

C. About 8-12 ms

D. Less than 1 ms

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Correct Answer: Option C

Explanation:
Typical seek times for 7200 RPM HDDs are around 8 to 12 milliseconds. SSDs have seek times in microseconds (less than 0.1 ms).

This question belongs to: Computer Memory and Storage Devices

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