What is the typical speed of a 7200 RPM hard disk in terms of average rotational latency?
A. 2.5 ms
B. 4.16 ms
C. 5.5 ms
D. 8.33 ms
Answer: Option B
Solution (By JKSSB Mock Tests)
Average rotational latency is half of the rotation period. For 7200 RPM, the disk rotates once every 8.33 ms, so average latency is 4.17 ms (approximately).
Explanation:
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.
Explanation:
Virtual memory is a memory management technique that uses a portion of the hard disk or SSD as an extension of RAM, allowing the system to run larger applications or multiple programs simultaneously.
Explanation:
Pen drives use NAND flash memory, which is a type of electrically erasable programmable read-only memory (EEPROM) that functions without moving parts.
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