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Define the difference between preemptive and non-preemptive scheduling.

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Feature Preemptive Scheduling Non-Preemptive Scheduling
CPU allocation Can be interrupted at any time Runs until completion or voluntarily yields CPU
Priority Higher priority processes can interrupt lower priority processes No priority levels for processes
Responsiveness Processes can be responsive to system events and changes Processes may not be able to respond quickly to system events
Resource Utilization Less efficient, as there is overhead in context switching More efficient, as there is less overhead in context switching
Complexity More complex, requires more management by the operating system Less complex, easier to manage by the operating system
Examples Real-time operating systems, multitasking environments Single-tasking environments, older operating systems

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