Explanation : Managing several versions or releases of a software is manged by SCM Filing bug reports and tracking their progressis not manged by SCM Allowing team members to work in parallel is manged by SCM Identifying when and where a regression occurred is manged by SCM So, option (A) is correct.
Explanation : First we will make gantt chart of given process then we will calculate turn around time and waiting time of individual process.
Now we have to calculate average waiting time for schedule:
avg waiting time = wt(P1 + P2 + P3 + P4 )/number of process.
ie. (9 + 0 + 15 + 2) / 4
= 26 / 4
So, option (A) is correct.
1. In FIFO algorithm 15 page fault will occur.
2. In LIFO algorithm 11 page fault will occur.
3. In LRU algorithm 12 page fault will occur.
4.In optimal algorithm 9 page fault will occur.
So, option (D) will be correct.