What is the typical rotational speed of a high-performance desktop hard disk in 2026? MCQ with Answer and Explanation

Question
What is the typical rotational speed of a high-performance desktop hard disk in 2026?
A. 10,000 RPM
B. 5400 RPM
C. 7200 RPM
D. 15,000 RPM
Answer: Option C
Solution (By JKSSB Mock Tests)
7200 RPM is common for desktop HDDs, while 5400 RPM is for energy-efficient or external drives. High-performance drives may be 10,000 RPM or more, but 7200 is standard.
This question belongs to: Computer Memory and Storage Devices
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Practice More Memory and Storage Devices Questions

Question #1
Which of the following is true about DRAM?
A. It is slower than SRAM but cheaper
B. It is non-volatile
C. It is static and does not need refresh
D. It uses flip-flops to store data
Discuss
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Correct Answer: Option A

Explanation:
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
Question #2
What does the term 'seek time' refer to in a hard disk drive?
A. Time to read data from the sector
B. Time to rotate the disk
C. Time to transfer data to the computer
D. Time to move the head to the correct track
Discuss
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Correct Answer: Option D

Explanation:
Seek time is the time taken for the read/write head to move to the correct track (cylinder) on the platter where the data is stored.
This question belongs to: Computer Memory and Storage Devices
Question #3
Which of the following is a characteristic of a magnetic disk?
A. Data is stored magnetically on a circular platter
B. Data is stored in flash cells
C. Data is stored using laser
D. Data is stored in pits
Discuss
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Correct Answer: Option A

Explanation:
Hard disk drives store data magnetically on rotating platters. Optical discs use pits, and SSDs use flash cells.
This question belongs to: Computer Memory and Storage Devices
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