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Operating System Interview Questions and Answers

Ques. What is the CPU Scheduler?
Ans. 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 non-preemptive. All other scheduling is preemptive.
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