M.Sc. (Semester IV) (CBCS) Examination Nov/Dec-2018
Computer Science
DISTRIBUTED OPERATING SYSTEM
Time: 2½ Hours Max. Marks: 70
Instructions: Q. No. and Q. No are compulsory.
Attempt any three from Q. No. to Q. No.
Figures to the right indicate full marks.
Q.1 Choose the correct alternative: 10
Network operating system runs on
Server
Every system in the network
Both server and every system in the network
None of these
In which OSI layer encryption and decryption happens?
Application Presentation
Transport Data Link
A process that is based on IPC mechanism which executes on different
systems and can communicate with other processes using message
based communication is called
Local Procedure Call Inter Process Communication
Remote Procedure Call Remote Machine Invocation
of the distributed file system are dispersed among various
machines of distributed system.
Clients Servers
Storage devices All of these
In distributed systems, a logical clock is associated with
Each instruction Each process
Each register All of these
For proper synchronization in distributed systems
Prevention from the deadlock is must
Prevention from the starvation is must
Prevention from the deadlock starvation is must
None of these
Which process can be affected by another processes executing in the
system?
cooperating process child process
parent process init process
Which one of the following is a synchronization tool?
Thread Pipe
Semaphore Socket

Page 2 of 2
SLR-VG-226
If a process is executing in its critical section, then no other processes
can be executing in their critical section. This condition is called
Mutual exclusion Critical exclusion
Synchronous exclusion Asynchronous exclusion
10) What is the reason for building distributed systems?
Resource sharing Computation speedup
Reliability All of these
State whether True or False: 04
In one site fails in distributed system, all the sites will stop working.
Inter process communication is concerned with the communication
between processes in a distributed system.
Network operating system is an example of distributed operating
system.
Distributed operating system is also called as tightly coupled system.
Q.2 Write short notes on: 08
Characteristics of interprocess communication
Differentiate between monolithic and micro kernel
Answer the following: 06
Advantages of Distributed System over Centralized System.
File replication
Q.3 Answer the following.
Explain transparency in distributed operating systems. 07
Explain distributed system with examples. 07
Q.4 Answer the following.
Why do we use Electronic algorithms? Explain Bully algorithm. 07
Describe about the client server communication. 07
Q.5 Answer the following.
Explain different communication protocol used of RPCs. 07
Describe Distributed file system implementation issues. 07
Q.6 Answer the following.
What do you mean by distributed file system? Discuss in detail semantics of
file sharing.
07
What is a Deadlock? Explain how the deadlock handling in a distributed
system environment.
07
Q.7 Answer the following.
State the comparison between MS-Windows NT and Novell Netware. 07
Why would you design a system as a distributed system? List some
advantages of distributed systems.