What is the difference between preemptive scheduling and time

Question :What is the difference between preemptive scheduling and time
slicing? (CoreJava)
Answer :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.