What is the difference between preemptive scheduling and time slicing?

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Under preemptive scheduling, the highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence. Under time slicing, a task executes for a predefined slice of time and then reenters the pool of ready tasks. The scheduler then determines which task should execute next, based on priority and other factors.

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What is the difference between preemptive scheduling and time slicing?

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