STUPIDSID




MORE IN Operating Systems
MU Computer Engineering (Semester 5)
Operating Systems
December 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

LOGIN TO DOWNLOAD PDF GET ANSWERS
Attempt any four question:
1 (a) Differentiate between Monolithic and Microkernel.
5 M
1 (b) Explain effect of page size on performance.
5 M
1 (c) Draw and explain five state process models.
5 M
1 (d) Explain disk cache.
5 M
1 (e) Explain "chmod" command in UNIX.
5 M
1 (f) What do you meant by 'Busy Waiting'? What is wrong with it?
5 M

2 (a) Explain in detail file management in UNIX.
10 M
2 (b) Explain dining philosopher problem and solution to it.
10 M

3 (a) What is deadlock? Explain necessary and sufficient conditions to occur deadlock. what is the difference between Deadlock avoidance and prevention?
10 M
3 (b) Consider the following set of process with CPU burst time.
Process Burst Time Arrival Time
P1 10 11
P2 04 2
P3 05 3
P4 03 4

i) Draw Gnatt chart for CFS, SJF pre-emptive and Round Robin (Quantum=0.3). Calculate average waiting time and average turnaround time.
10 M

4 (a) What is Operating System? Explain different functions and objectives of operating system.
10 M
4 (b) What is mutual exclusion? Give software approach for mutual exclusion.
10 M

5 (a) Consider following snapshot at time T0:5 processes P0 through P4.3 resources types A(10 units), B(5 units) and C(7 units).
  ALLOCATION MAX AVAILABLE
  A B C A B C A B C
P0 0 1 0 7 5 3 3 3 2
P1 2 0 0 3 2 2      
P2 3 0 2 9 0 2      
P3 2 1 1 2 2 2      
P4 0 0 2 4 3 3      

i) Compute "Still Need" matrix?
ii) Is system currently in safe or unsafe state? Why?
10 M
5 (b) Explain various I/O buffering techniques.
10 M

6 (a) What is system calls of operating systems? Explain any five systems calls.
10 M
6 (b) Explain techniques of disk scheduling.
10 M


More question papers from Operating Systems
SPONSORED ADVERTISEMENTS