Answer:
► Selects from among the processes in memory that are ready to execute, and allocates the CPU to one of them.
► CPU scheduling decisions may take place when a process:
1.Switches from running to waiting state.
2.Switches from running to ready state.
3.Switches from waiting to ready.
4.Terminates.
► Scheduling under 1 and 4 is nonpreemptive.
► All other scheduling is preemptive.
► CPU scheduling decisions may take place when a process:
1.Switches from running to waiting state.
2.Switches from running to ready state.
3.Switches from waiting to ready.
4.Terminates.
► Scheduling under 1 and 4 is nonpreemptive.
► All other scheduling is preemptive.
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