GATE | CS | 2019 | Operating System | CPU Scheduling | Question 50

Consider the following four processes with arrival times (in milliseconds) and their length of CPU burst (in milliseconds) as shown below:

These processes are run on a single processor using preemptive Shortest Remaining Time First scheduling algorithm. If the average waiting time of the processes is 1 millisecond, then the value of Z is __________.

Note: This was Numerical Type question.