a2zinterviews

21.	What is thrashing?
	It is a phenomenon in virtual memory schemes when the processor spends most of its time swapping pages, rather than executing instructions. This is due to an inordinate number of page faults.

22.	What are the states of a process?
	New Running Waiting Ready Terminated

23.	What is a binary semaphore?
	A binary semaphore is one, which takes only 0 and 1 as values. They are used to implement mutual exclusion and synchronize concurrent processes.

24.	What is a job queue?
	When a process enters the system it is placed in the job queue.

25.	What is a ready queue?
	The processes that are residing in the main memory and are ready and waiting to execute are kept on a list called the ready queue.