TOPIC

Computers

QUESTION

A hard disk drive with 3.5 cm diameter platter turns at 1500 RPM. The average latency for the drive in seconds nearly is

A. 0.006

B. 0.02

C. 0.04

D. 0.08

HINT

The average latency of a hard drive is defined as the time it takes for a hard drive to rotate one half of a revolution. So if the hard drive makes 1500 revolutions per minute, how much time does it take it to make one-half of a revolution. Yes, 1500 revolutions per minute means 25 revolutions per second.

ACKNOWLEDGEMENT

This question of the day was provided by the courtesy of Professor Autar Kaw of the University of South Florida from the book FE Practice Exam With Complete Solutions