memory managment

Question 1

what is virtual memory

Answer 1

when RAM runs out virtual memory temporarily transfers data from RAM and stores it to disk storage to free up ram space.x

Question 2

what is paging

Answer 2

splitting up a program into equally sized blocks of data .(these then allow for virtual memory to be used using them)

Question 3

what is segmentation

Answer 3

splitting up of memory into logical sized divisions.

Question 4

what is the main problem with paging seg and virtual memoery

Answer 4

disk thrashing , this is when the computer freezes as a result of pages being swapped to frequently.