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Distributed Systems(Bbit 413) Question Paper

Distributed Systems(Bbit 413)

Course:Computer Information Systems And Business Information Technology

Institution: Kenya Methodist University question papers

Exam Year:2010

TIME : 2 HOURS
INSTRUCTIONS Answer Question ONE and any Other TWO Questions

Question 1
a) Briefly explain the concept of distributed system. (2marks)
b) Define the following terms.
i) Noise
ii) Distribution transparency
iii) middleware
iv) Scalability (8marks)
c) State and explain five reasons you would give for creating a distributed system(10marks)
d) With aid of a suitable diagram explain the tightly coupled configuration. (4marks)
e)When designing distributed systems, reliability is considered. Describe the three components of reliability. (6marks)

Question 2
a) Provide one advantage and one disadvantage of the Transmission Control Protocol vis a vis the Universal Datagram Protocol. (4marks)
b) Explain briefly the difference between a client/server and a distributed system(6marks)
c) Describe 5 dimensions (types) of transparency in a distributed system. (10marks)

Question 3
a) Data distribution can be viewed under two main concepts; data partitioning and data replication. Briefly explain these two concepts.(10marks)
b) Under distributed management, the management system’s structure has a three-tiered architecture. With the aid of a suitable diagram explain this architecture. (10marks)

Question 4
With regards to distributed systems, briefly explain the following concepts: a) Process (4marks)
b) Threads (4marks)
c) Explain the process of creating a process in a distributed system. (12marks)

Question 5
a) i)Describe Message passing using asynchronous point to point communication in a distributed system. (6marks)
ii)During interprocess communication messages may flow directly or indirectly. Explain direct and indirect messages. (6marks)
b)With the aid of a diagram(s) differentiate between the OSI and the TCP/IP models.(8marks)

Distributed Systems(Bbit 413) Question Paper

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