0 votes 0 votes N processes are waiting for $I/O$. A process spends a fraction $p$ of its time in $I/O$ wait state. The $CPU$ utilization is given by : 1-p-N 1-pN pN p-N Operating System ugcnetcse-dec2008-paper2 operating-system process-model + – rishu_darkshadow asked Sep 25, 2017 • edited Jun 24, 2020 by soujanyareddy13 rishu_darkshadow 1.8k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 1 votes 1 votes Ans is B Let p=20% of time of process invest in i/o N=1 Cpu utili.=1-pN=1-(.2)^1=.80=80% N=2 Cpu utili.=1-(0.2)^2=1-.04=.96=96% And so on.. So in multiprogramming environment if no. Of processes increases the CPU utili. Also increases Devendra Patel answered Sep 26, 2017 • selected Sep 27, 2017 by rishu_darkshadow Devendra Patel comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes Ans: B CPU utilization = 1 - p ^n ref: http://brahms.emu.edu.tr/filizbilen/OS/Lecture%20Notes-Chapter%202.pdf rishu_darkshadow answered Sep 27, 2017 rishu_darkshadow comment Share Follow See all 0 reply Please log in or register to add a comment.