Multiple choice

In a system the fraction of time CPU is busy in a system with a single processor is 70%. Each process requires an average of 7 seconds of service time. Find out the processors that arrive per minute.

  1. 5

  2. 6

  3. 4

  4. 8

  5. 7

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Staying time of one process:
CPU utilisation = service time / staying time  70 % = 7/ staying time Staying time = 700/70 = 10 second, i.e. 1 process stays 10 seconds with CPU, then for 60 seconds; 6 processes stay with CPU