thukral.rahul

 Profile Answers by thukral.rahul 

• Jan 12th, 2010

 

When a user executes a file , the process is directly loaded into the memory . Genearly some OS has a Long term scheduler which moves the processes from the waiting queue to the ready queue(in memory). This long term scheduler controlls the degree of multiprogramming in the system.

But some operating systems like windows don't have this long term scheduler but directly puts every process in the ready queue in memory waiting for the CPU allocation to that process.

After this the short term scheduler finally schedules the cpu to the process in the main memory according to various cpu scheduling algorithms .

Also note that whole process is not directly put in the memory instead only certain pages are kept in the memory at a time .