2 votes 2 votes With four programs in memory and with $80$% average $I/O$ wait, the $\text{CPU}$ utilization is ? $60$% $70$% $90$% $100$% CO and Architecture ugcnetcse-june2009-paper2 + – rishu_darkshadow asked Sep 21, 2017 edited Jun 23, 2020 by soujanyareddy13 rishu_darkshadow 830 views answer comment Share Follow See 1 comment See all 1 1 comment reply Gaurav Joshi commented Sep 22, 2017 reply Follow Share (C) 90 % ?? 0 votes 0 votes Please log in or register to add a comment.
Best answer 1 votes 1 votes Ans:-A Explanation:-CPU utilisation is given by the formula = 1 - P pow n CPU utilisation is calculated from a probabilistic viewpoint. P stands for the fraction of time waiting for I/O to complete. Number of processes in memory = n The probability that all n processes are waiting for I/O is p pow n. P=80%=80/100=0.8 n=4 CPU Utilization = 1 - p pow n = 1 - (0.8) pow 4 = 1 - 0.4096 = 60% also--> https://gateoverflow.in/99962/with-four-programs-memory-and-with-average-wait-utilization rishu_darkshadow answered Sep 26, 2017 rishu_darkshadow comment Share Follow See all 0 reply Please log in or register to add a comment.