a2zinterviews

55.	What are local and global page replacements?
	Local replacement means that an incoming page is brought in only to the relevant process address space. Global replacement policy allows any page frame from any process to be replaced. The latter is applicable to variable partitions model only.

56.	What is cache-coherency?
	In a multiprocessor system there exist several caches each may containing a copy of same variable A. Then a change in one cache should immediately be reflected in all other caches this process of maintaining the same value of a data in all the caches s called cache–coherency.

57.	What are the benefits of multithreaded programming?
	Responsiveness Resources sharing Economy Utilization of multiprocessor architectures. .