M.C.A. (Semester IV) (CBCS) Examination Nov/Dec-2018
Science
DISTRIBUTED OPERATING SYSTEM
Ii
Time 2½ Hours Max. Marks: 70
Instructions: Question No. 1 and 2 are compulsory.
Attempt any 3 questions from Q. No. 3 to Q. No. 7.
Figures to the right indicate full marks
Q.1 Choose the correct alternative. 14
In Transparency user should not need to recognize whether a
resource is remote or local.
replication location
access failure
According to the ring algorithm links between process are
Bidirectional Unidirectional
Both and None of these
means a group of independent computers each with its own
program counter, program and data.
SISD SIMD
MIMD MISD
To access the services of operating system, the interface is provided by the

System calls API
Library Assembly instructions
clocks are required where actual clock time is important.
Logical Physical
Both a and b None of these
Diskless workstations are popular because of ease maintenance.
True False
In method every operation on a file is instantly visible to all
processes.
Session semantics Immutable files
Transactions UNIX semantics
Open groups are typically used for parallel processing.
True False
Distributed operating system is able to spread the workload over the
available machines due to
data sharing device sharing
communication flexibility
10) In RPC, a message can be sent to multiple receivers in one operation.
True False 8
11) Because of virtual memory, the memory can be shared among
Processes Threads
Instructions None of these
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SLR-SN-29
12) If one site fails in distributed system
Directly connected sites will stop working
All the sites will stop working
The remaining sites can continue operating
None of these
13) For non sharable resources like a printer, mutual exclusion
Must on exist Must exist
May exist None of these
14) is the capability of a system to adapt to increase service load.
Performance Scalability
Flexibility Reliability
Q.2 Write short notes on: 08
RPC
Difference between distributed O.S. and network O.S.
Explain the following: 06
Virtual memory
Device management
Q.3 What are the design issues in distributed operating system? Explain. 07
Compare Windows-NT and Novell Netware. 07
Q.4 Explain Processor pool model in detail. 07
Explain clock synchronization in detail. 07
Q.5 What is an election algorithm? Explain Ring algorithm in detail. 07
Explain various trends in distributed file systems. 07
Q.6 What is a thread? Explain implementation of a thread package. 07
Explain deadlock detection in distributed system. 07
Q.7 What is meant by remote procedure call? Explain in detail parameter
passing in RPC.
07
Explain file sharing semantics in detail. 07