scheduling Algorithm
Here are some assignment questions on scheduling algorithms, which includes First Come First Serve(FCFS) and Shortest Job First(SJF). In SJF questions are given both on Preemptive and Non-Preemptive Scheduling Algorithm.
Preemptive Scheduling
Preemptive Scheduling of Operating Systems described here
Preemptive Scheduling in OS
Preemptive Scheduling of Operating Systems described here properly