Anna University Chennai 2007 B.Sc Computer Science Distributed Operating Systems - Question Paper

B. Sc. DEGREE exam

DISTRIBUTED OPERATING SYSTEMS

Time : 3 Hours Maximum : 100 marks

ans ALL quextions

PART A – (10 X two = 20 marks)

1. Define distributed operating system..
2. What is buffering.
3. What is marshaling?
4. Define thrashing...
5. What is the need for clock synchronization?
6. What is event ordering?
7. What is process migration.
8. Define threads.
9. What is file replication?.
10. What is meant by atomic transaction?

PART B – (5 X 16 = 80 marks)

11. (a) (i) What is deadlock? provide an example. (4)
(ii) discuss deadlock handling in distributed environment (12)

(Or)

(b) (i) State the reasons for coordinator failure in a distributed environment (4)
(ii) explain any 2 election algorithms of your option to deal with coordinator failure (12)

12. (a) (i) explain distributed operating system design problems (8)
(ii) Write short notes on message passing. (8)

(or)

(b) (i) discuss process addressing (8)
(ii) Write notes on failure handling (8)



13. (a) (i) What is RPC? Compare RPC with ordinary procedure call model. (4)

(ii) discuss RPS handling in detail. (12)
(or)
(b) (i) discuss distributed shared memory. (8)
(ii) Write about consistency models (8)

14. (a) explain task assignment and load balancing in distributed environment (16)

(or)

(b) (i) discuss thread handling in detail. (8)


(ii) discuss load sharing in distributed systems (8)

15. (a) discuss the distributed file system design and implementation issued in detail. (16)

(or)

(b) Write notes on coaching schemes and fault tolerance. (16)

Earning:   Approval pending.