APRIL 2011		51306/SAZ4B

Time:3 hours		Maximum:75 marks

SECTION A - (10x2 =20 marks)

Answer any TEN questions.

All questions carry equal marks.

1. Define computer-server system.

2. What is GUI?

3. Define program execution.

4. What is signal( ) semaphore operation?

5. Define transaction.

6. What is schedule?

7. What is meant by segmentation?

8. Define swapping.

9. Define swap space.

10. What is slab allocation?

11. Define polling.

12. Define interrupt vector.

SECTION B - (5x5 =25 marks)

Answer any FIVE questions.

All questions carry equal marks.

13. Discuss on Operating system operations.

14. Explain special purpose systems.

15. Describe on characterization.

16. Write a note on logical and physical address space.

17. Explain FIFO page and LRU page replacements.

18. Discuss about free space management and directory struchture.

19. Explain threats and authentication.

SECTION C - (3x10 =30 marks)

Answer any THREE questions.

All questions carry equal marks.

20. Explain in detail about operating system structure.

21. Describe about Deadlock prevention and avoidance.

22. Discuss in detail about hardware protection and fragmentation.

23. Explain about thrashing.

24. Discuss on I/O scheduling, buffering, caching and error handling.

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