title: Are processes executed on operating system
body: <p>I saw this question somewhere</p>
  
  <p>Four processes p1, p2, p3, p4 - each have sizes 1GB, 1.2GB, 2GB, 1GB. And each processes is executed as a time sharing fashion. Will they be executed on an operating system.</p>
  
  <p>I think the answer should be No,they are not executed on operating system because OS is itself a process and it will be running in parallel to these processes.There will be switching between processes from time to time with the help of dispatcher.</p>
  
  <p>but i am getting the doubt that answer can also be yes because it uses every process uses memory which is managed by theb operating system .</p>
  
  <p>please help me figure out the right answer for the question..</p>