engineering computer science MCQ #235

If a disk has 2000 tracks, 20 sectors per track, and rotates at 7200 rpm, what is the average rotational latency?

engineering computer science MCQ #235

  1. Question 1

    Q1. If a disk has 2000 tracks, 20 sectors per track, and rotates at 7200 rpm, what is the average rotational latency?

    • A) 4.17 ms
    • B) 8.33 ms
    • C) 2.08 ms
    • D) 6.25 ms

    Answer: 4.17 ms

    Explanation: Average rotational latency = 0.5 * (60 / rpm) = 0.5 * (60 / 7200) = 0.5 * 0.00833 = 0.00417 seconds = 4.17 ms.