MEANING OF PREEMPTIVE AND NON PREEMPTIVE IN OPERATING SYSTEM

in the chapter operating system, you will often see the term, "preemptive" and "non-preemptive"

so let me explain to you what does preemptive and non-preemptive mean in OS.
to understand preemptive better let's understand non-preemptive first.in CPU, non-preemptive scheduling  means if a process gets the process gets the processor, then the process won't stop, not until it completes the work
in non-preemptive nobody can stop the process from completing