Distributed Computing University questions 2011

Answer ALL questions.
1. What are the disadvantages of distributed systems?
2. Differentiate between tightly coupled and loosely coupled systems.
3. What is predicate addressing?
4. What do you mean by server crashes and client crashes?
5. What is Synchronization?
6. Explain remote access model.
7. Discuss Fault Tolerance Issues.
8. Write a note on Concurrency Control.
9. What is a query in Distributed DBMS? Explain.
10. What is call by reference? Give an example.
PART B — (4 ? 10 = 40 marks)

Answer any FOUR questions.
11. Explain the differences between the three kinds of the system such as Network, Distributed and Multiprocessor Operating Systems.
12. Discuss in detail about Remote Procedure Calls (RPC).
13. Explain Deadlock Prevention Mechanism in Distributed Systems.
14. Discuss the following concepts related to distributed systems :
(a) The Directory Server Interface.
(b) Semantics of File Sorting.
15. (a) Explain the advantages and disadvantages of Distributed DBMS.
(b) Write a note on ‘Directory’.
16. (a) Distinguish between Centralized Systems and Distributed Systems.
(b) Briefly explain Research Goals of AMOEBA.
PART C — (2 ? 15 = 30 marks)
Answer any TWO questions.
17. Discuss in detail about various layers in OSI Model.
18. (a) Explain Election Algorithm using Ring.
(b) Write short notes on ‘Mutual Exclusion.
19. Briefly explain the following :
(a) Memory Management in MACH.
(b) Bus Based Multiprocessors.
(c) Group Addressing.