City Guilds Model Questions Vol1 2020 Information Technology Question 13
Practice objective / multiple choice question 13 from the 2020 City Guilds Model Questions Vol1 Information Technology examination.
Three processes A, B and C are scheduled in the order A → B → C on a single‑CPU system. Their CPU bursts and I/O wait times are as follows:\n\n- Process A: CPU 20 ms, I/O wait 10 ms, then CPU 15 ms.\n- Process B: CPU 30 ms, I/O wait 5 ms, then CPU 20 ms.\n- Process C: CPU 25 ms, no I/O.\n\nAssume that while a process is performing I/O, the CPU can execute another ready process. Determine (i) the total elapsed time from the start of A to the completion of C, and (ii) the CPU utilisation percentage over this interval.
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About This Question
This is City Guilds Model Questions Vol1 2020 Information Technology Question 13. It is one of the objective questions from the 2020 City Guilds Model Questions Vol1 Information Technology examination.
Difficulty level: Easy .
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