0 votes 0 votes A set of techniques that allow to execute a program which is not entirely in memory is? a-demand paging b-virtual memory c-auxilary memory d-secondary memory na2re2nder2 s2ingh asked Apr 5, 2017 na2re2nder2 s2ingh 572 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes b. virtual memory https://en.wikipedia.org/wiki/Virtual_memory 2018 answered Apr 5, 2017 2018 comment Share Follow See all 5 Comments See all 5 5 Comments reply Akriti sood commented Apr 5, 2017 reply Follow Share why not demand paging? 0 votes 0 votes 2018 commented Apr 5, 2017 reply Follow Share bcz demand paging is used basically for efficient utilization of mem as if a program have nothing to do with part of module then why to store that portion of code in memory. it save mamory using on demand swap in and swap out process which reduce uses of memory. whereas virtual mem provide illusion and use bigger size program to execute than available main mem. using demand paging u can't use mem more than physical mem more accurately question should be like this "A set of techniques that allow to execute a program which can't fit entirely in memory " now if some program need more mem than available and all module together need mem to run then demand paging can't do any thing as we can't swap out some processes as all needed at the current time to run the program in that case virtual mem will come in the role 0 votes 0 votes Akriti sood commented Apr 5, 2017 reply Follow Share i understand that but virtual memory needs help of demand paging na 0 votes 0 votes 2018 commented Apr 5, 2017 reply Follow Share yes right but i'm saying if whole program needed at once and available physical mem is not up to the mark then demand paging has nothing to do with this situation, bcz we can't swap out some of the module as all needed, so here virtual mem will play a roll 0 votes 0 votes Akriti sood commented Apr 5, 2017 reply Follow Share okay..thanks..:) 0 votes 0 votes Please log in or register to add a comment.