Balls - 2010 Preemptive Celebration 1-24 was released on:

USA: 20 January 2010

There is no such concept of a "Preemptive Process"

PreEmptive Solutions was created in 1996.

1.) in preemptive scheduling we prempt the currently executing process,

in non preemptive scheduling we allow the current process to finish its CPU burst time...

2.) in preemptive scheduling the process is forcibly sent to waiting state when a process with higher priority comes to CPU,

in non preeemptive scheduling the process at running state can not be forced to leave the CPU until it completes........

preemptive or pre-emptive.