DISTANCE EDUCATION
M.Sc. (I.T.) DEGREE EXAMINATION, MAY 2016.
OPERATING SYSTEMS
(2002 onwards)
Time Three hours Maximum 100 marks
SECTION A — (10 3 30 marks)
Answer ALL questions.
1. What are the objectives of operating system?
2. What do you mean by batch processing?
3. What are the reasons to suspend a process?
4. What is a monitor? What is the purpose of the monitor?
5. Give the reasons for Buffering.
6. Define Seek Time.
7. Write the advantages of multiprogramming.
8. What is the difference between logical address and
physical address?
9. What is the use of device driver?
10. List the operations on file.
Sub. Code
12
DE-3664
2
wk 3
SECTION B — 10 40 marks)
Answer any FOUR questions.
11. Explain the structure of an operating system.
12. Describe the producer consumer problem.
13. Explain the need of interrupt controllers.
14. Explain the multiprogramming with fixed partition
scheme with an example.
15. What are the approaches available to protect the file
system and explain?
16. Describe any three popular page replacement algorithms.
SECTION C — × 15 30 marks)
Answer any TWO questions.
17. Consider the following set of processes and CPU time.
Calculate the average waiting time, average turn around
time and average response time for the algorithms FCFS,
SJF and RR (Time quantum scheduling
Process P1 P2 P3 P4 P5
CPU Time 5 12 16 18 2
Priority 4 1 3 5 2
18. What is deadlock? What are the necessary conditions for
deadlock? Explain them.
19. Explain the segmentation scheme in detail.