Q2

(1)

1. Process is an executing program, also called as an instance of a program
2. It is a unit of work in time-sharing system
3. It has normally 5 status: new, running, waiting, ready and terminated. (Note: The name of the status are not fixed)

(2)

• new: A progress is created
• running: A progress (the instruction inside) is being executing
• waiting: A progress is not executing and waiting for some event occurs
• ready: A progress is not executing and waiting to be allocated to a processor
• terminated: A progress is done and exiting

(3)

	  
         |<-------------|
new --> ready ------> running --> terminated
         |<-- waiting --|

Q3