Bharathidasan University 2009 M.C.A Computer Aplications - RQG426A - Distributed Operating Systems - '09 - - Dist Education - Question Paper

S. No 6593 RQG426A

(For candidates admitted from 2006-2007 onwards)
MCA Degree Examination, April 2009
Computer Applications
DISTRIBUTED OPERATING SYSTEMS
Time: 3 hours Maximum: 75 Marks

PART A (10 x two = 20 Marks)
ans ALL ques.
1. What is an atomic transaction?
2. What is difference ranging from explicit addressing and implicit addressing?
3. Define: Mutual Exclusive Condition.
4. What is the meaning of ROLL Back of process?
5. What is meant by passive attack and active attack?
6. elaborate the main kinds of authentication? write them.
7. When will you need multicast and broadcast communication?
8. When will Race condition occur?
9. What is the syntax of the Msggest system call?
10. What is the semaphore?

PART B (5 x five = 25 Marks)
ans ALL ques.
11. (a) discuss the various kinds of transparency
or
(b) discuss the buffering
12. (a) explain the Bully algorithm for message passing
or
(b) discuss the concept of threads
13. (a) What ar the approached to authentication? discuss them
or
(b) discuss the use of access matrix in the domain based protecting system
14. (a) discuss the structure of supper block
or
(b) explain how system call is used to create a file
15. (a) discuss the concept of shared memory
or
(b) discuss the Dijkstra's Algorithm for semaphore

PART C (3 x 10 = 30 Marks)
ans Any 3 ques.
16. discuss the advantages of work station-server model
17. How do you implement the logical clocks concept?
18. explain the basic principle for cryptography
19. Write an algorithm for conversion of a pathname into Inode
20. define the process of sockets with diagram model

Earning:   Approval pending.