Periyar University 2006 B.Sc Computer Science OPERATING SYSTEMS - Question Paper

B.Sc. DEGREE EXAMINATION, APRIL/MAY 2006.
Sixth Semester
Computer Science
OPERATING SYSTEMS
Time : 3 hours Maximum : 100 marks
PART A — (20 x one = 20 marks)
ans ALL ques..
1. Define Multiprocessing.
2. What is Risc?
3. Define Dead lock.
4. What is DAT?
5. What is meant by MIMD?
6. What is Array processors?
7. Mention any 2 file organization methods
8. What is a distributed Database?
9. What is a Kernel?
10. What do you mean by physical security?
11. A register allows program to be
relocated dynamically.
12. Most famous dead lock - avoidance algorithm is
13. Simplest scheduling discipline is .
14. Three various database models are ,
15. The user can tailor the working environment via file that describes the OS characteristics
of an MS DOS.
Say actual or False :
16. Expantion of IOCS is Input Output Control
System.
17. In noncontiguous storage allocation a program divided into several blocks.
18. Static priorities do not change systems.
19. A file descriptor is a control block containing info the system needs to manage a file.
20. Unix system is a multi user system
PAKT B (5x7 = 35 marks)
ans ALL ques..
21. (a) discuss in detail process state transition with
an example.
Or
(b) elaborate the different kinds of interrupt?
22. (a) How will you avoid Dead lock? discuss.
Or
(b) discuss in detail virtual address translation with block mapping.
23. (a) Write a note on vector processing.
Or (b) Write down any 7 scheduling objectives.
24. (a) discuss in detail any 2 seek optimization
strategies.
Or
(b) Write down the different functions of file system.
25. (a) Write down the commands and its purpose for
working with directions in MS-DOS.
Or
(b) Write a note on file system in Unix.
PART C (3 x 15 = 45 marks)
ans any 3 ques..
26. Discuss in detail the nucleus of the operating system.
27. Explain in detail virtual address translation with combined associative /direct mapping in a paged and segmented system.
28. Explain in detail any 3 scheduling discipline of processes.
29. Discuss in detail database systems.
30. Explain in detail any 5 concepts under operating system security.

Earning:   Approval pending.