M.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Second Semester
Computer Science
OPERATING SYSTEM
(CBCS 2014 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Define system calls.
2. List the basic functions of an operating system.
3. Define threads.
4. What is CPU input-output burst cycle?
5. Define monitor.
6. When deadlock occurs?
7. What is thrashing?
8. When does a page replacement arise during program
execution?
9. What is defragmentation?
10. Define Polling.
Sub. Code
4MCE2C3
AFF-4954
2
W7
Part B x 5 25)
Answer all questions.
11. Write short notes on Time Sharing.
Or
Explain about storage structures.
12. With example, explain about the different types of
multithreaded models.
Or
Explain about FCFS, SJF and Round Robin Job
scheduling algorithms with example.
13. What is synchronisation? How it is achieved?
Or
Discuss about the characteristics of deadlock.
14. Explain about logical versus physical addressing
with example.
Or
Describe about internal and external fragmentation
with example.
15. How is reliability of storage improved by
redundancy?
Or
Discuss about LOOK and C-LOOK algorithms with
example.
AFF-4954
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W7
Part C x 10 30)
Answer any three questions.
16. Discuss about the history of operating systems in
chronological order.
17. What is meant by inter-process communication? How is
synchronization achieved?
18. Discuss about implementation of Semaphore with
example.
19. Explain about the paging with illustrative diagram. What
is demand paging?
20. What is the need for a file? Discuss about the different
file allocation and access methods available.
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