DISTRIBUTED COMPUTING (DC) DECEMBER 2010 COMPUTER SCIENCE SEMESTER 8

DISTRIBUTED COMPUTING (DC) DECEMBER 2010 COMPUTER SCIENCE SEMESTER 8

Con.5616-10.                                                                                                GT-8466 

                                                            (3 Hours)                                  [Total Marks:-100]

N.B. (1) Question No.1 is compulsory.
         (2) Attempt any four questions out of remaining six questions.
         (3) Assume suitable data wherever required.

1. (a) What are the different goals of distributed system? Explain how these goals are implemented
          in distributed system. [10 Marks]
    (b) Compare Multi computer systems with Multi processor systems. [10 Marks]
 
2. (a) Compare NOS and DOS middleware. [10 Marks]
    (b) Explain any algorithm designed to provide mutual exclusion in distributed
         environment. [10 Marks] 

3. (a) Explain the difference between Data Centric consistency and client centric consistency
         models. Explain one scheme of each. [10 Marks]
    (b) What is transparency? Discuss transparency with respect to distributed system. [10 Marks]

4. (a) What are Totally Ordered multicasting? How Lamport Clock is implemented? [10 Marks]
    (b) Explain the code migration and the role of mobile agents. [10 Marks]

5. (a) Explain various forms of message oriented communication with suitable application of
         each. [10 Marks]
    (b) Explain with example Threads and processes, discuss differences and similarities between
         thread and process. [10 Marks]

6. (a) What is Name Resolution? Explain various ways of name resolution. [10 Marks]
    (b) What is CORBA? Explain the working of CORBA as middleware. [10 Marks]

7. Write details note on any four:- [20 Marks]
     (a) CODA file system.
     (b) Mobile Agents.
     (c) Message Broker.
     (d) Crash and Recovery
     (e) peer to peer model as compare to client-server model.