2004-05 MODEL PAPER

MCA 2.2.5

DISTRIBUTED SYSTEMS

Elective I

First Question is Compulsory

Answer any four from the remaining

Answer all parts of any Question at one place.

Time: 3 Hrs.
Max. Marks: 100

1. Explain the following terms.
a. Intranet
b. Thin client
c. UDP
d. Idempotent operation
e. RMI
f. Stateless server
g. URL
h. Clock skew
i. Locks
j. Atomicity property

2. a. Define a distributed system and give example for the same.
b. Discuss performance and quality of service aspects of a distributed system.

3. a. Explain how IP addressing is done.
b. Briefly explain group communication.

4. Discuss the design and implementation issues in Re mote Method Invocation (RMI)

5. a. Discuss the mounting issues of remote file systems on NFS client.
b. Briefly discuss about Andrew file system.

6. Discuss the design and implementation issues of Domain Name System.

7. a. Explain how Lamport’s logical clocks are synchronized.
b. Explain the Bully Algorithm for election of coordinator.

8. a. Explain how distributed deadlocks can be detected.
b. Explain how primary-backup model of replication is fault tolerant.