Question

Define the difference between preemptive and non-preemptive scheduling.

Answer 1

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