When does page fault occur ? The deadlock occurs The page is present in memory The page does not present in memory The buffering occurs None Which program runs first after booting the computer and loading the GUI? Authentication Desktop Manager Windows Explorer File Manager None For which purpose the fence register is used ? For CPU protection For disk protection For memory protection None of these None What type of commands are required to perform various tasks in DOS? Primary commands Internal commands External commands Valuable commands None What is UNIX operating system? is multiuser is multitasking can run on PC's and larger system All of these None Time's up Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
