Operation Process

a). Process on creation

• Parent process creates children processes, which, in turn create other processes, forming a tree of processes.
  Resource sharing
  -Parent and children share all resources.
  -Children share subset of parent’s resources.
  -Parent and child share no resources
  

b). Process Termination

• Process executes last statement and asks the operating system to delete it (exit)
  -Output data from child to parent (via wait).
  -Process’ resources are deallocated by operating system.
  
• Parent may terminate execution of children processes (abort).
  -Child has exceeded allocated resources.
  -Task assigned to child is no longer required.
  -Parent is exiting.