Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Operating Systems CPU Scheduling Process Scheduling
Consider the following four processes with the arrival time and length of CPU burst given in milliseconds :
| Process | Arrival Time | Burst Time |
| P1 | 0 | 8 |
| P2 | 1 | 4 |
| P3 | 2 | 9 |
| P4 | 3 | 5 |
The average waiting time for preemptive SJF scheduling algorithm is
1
6.5 ms
2
7.5 ms
3
6.75 ms
4
7.75 ms