What is the typical speed of a 7200 RPM hard disk in terms of average rotational latency? MCQ with Answer and Explanation

What is the typical speed of a 7200 RPM hard disk in terms of average rotational latency?
A. 2.5 ms
B. 5.5 ms
C. 4.16 ms
D. 8.33 ms
Answer: Option C
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).

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Which of the following is a type of memory that is used in networking devices?
A. Flash
B. DRAM
C. All of the above
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Correct Answer: Option C


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What does the acronym 'EEPROM' stand for?
A. Electrically Erasable Programmable Random-Only Memory
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Correct Answer: Option D


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