Computer Science: An Overview: Global Edition (12th Edition)

Published by Pearson Higher Education
ISBN 10: 1292061162
ISBN 13: 978-1-29206-116-0

Chapter 3 - Operating Systems - Chapter Review Problems - Page 163: 22

Answer

$20$ time slices

Work Step by Step

Given that a word is considered five characters, and the typist types 60 words per minute: Words per minute = 60 Characters per word = 5 Characters per minute = Words per minute * Characters per word Characters per minute = 60 * 5 = 300 Now, to find the time per character: Time per character = 1 minute / Characters per minute Time per character = 1 minute / 300 characters To convert minutes to milliseconds, we can multiply by 60,000 (since 1 minute = 60,000 milliseconds): Time per character = (1 / 300) * 60,000 milliseconds Now, calculating this expression: Time per character ≈ 200 milliseconds So, the time between typing each character is approximately 200 milliseconds. Regarding the multiprogramming operating system, if it allocates time slices in 10-millisecond units, the number of time slices between characters being typed can be found by dividing the time per character by the time slice duration: Number of time slices = Time per character / Time slice duration Number of time slices = 200 milliseconds / 10 milliseconds Number of time slices = 20 Therefore, approximately 20 time slices could be allocated between characters being typed.
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