Distributed Systems Dec 2002

4.

643 B. E. (Computer Science) VIIIth Semester Examination, December-2002

DISTRIBUTED SYSTEM Paper-CSE-4S4-C Time allowed: 3 hours

Maximum Marks: 100

Note: Attemp: aliY fi,'e of the following.

1. (a)

What is the role of client-server model and group

6.

( Describe the real-time distributed systems and its design b issues. How communication takes place in real time ) systems? 20

S.

What 2.( is mutual exclusion in distributed systems? Write some algorithms of mutual exclusion and compare all of a these algorithms. )

communication in distributed systems ? ( b )

What are the advantages of layered protocol? 10, 10 What are deadlocks in distributed systems? Explain. Describe the techniques involved in deadlock detection. 10, 10

3. Explain the consistency model in detail. 643-300 P-2 (Q-8) (c)

5.

(d)

20 6.(a) (b)

What are the distribu ted systems ? Explain . What are the advanta ges of distribu ted system s over centrali zed system s? What are the advanta ges of distribu ted system s over person nel comput ers? What are the disadva ntages of distribu ted systems ?

4x5 P . T . G .

7.

( 2)

;.~ f.

7.

Explain processor allocation in terms of distributed systems and explain design issues for processor allocation with suitable algorithms. 20

8.

Write short notes on the following: (a)

Memory sharing in MACH.

(b)

Election Algorithms

643-300