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Distributed Systems(Bbit 448) (Cisy 432) Question Paper

Distributed Systems(Bbit 448) (Cisy 432)

Course:Computer Science & Business Information

Institution: Kenya Methodist University question papers

Exam Year:2013

TIME : 2 HOURS

INSTRUCTIONS
Answer all questions in Section A and any other two questions in section B.
SECTION A
Question One (compulsory 30 marks)
Define the term "distributed systems."
(1 Mark)
Briefly describe any five issues that arise from the distributed nature of an application.
(5 marks)
One of the communication models in distributed systems is client/server model. Describe a client, server and the request/reply protocol.
(6 marks)
Explain the elements of a distributed system.
(5 marks)
State the function of a middleware and its three components.
(4 marks)
Explain the importance of distributed system.
(5 marks)
Explain two advantages of two disadvantages of distributed databases.
(4 marks)
SECTION B
Question Two (20 marks)
Briefly explain with relevant examples, five desirables features of a good distributed file system.
(10 Marks)
Explain the challenges on the design of distributed systems.
(10 marks)

Question Three (20 Marks)
Compare grid and cluster computing.
(4 marks)
Explain different types of cluster with examples.
(6 marks)
Discuss five different types of failure in RPC.
(10 Marks)

Question Four (20 marks)
Explain the following as they apply in distributed system
(9 Marks)
Event ordering
Mutual exclusion
Election algorithm
A computer dock usually consists of three components name and briefly explain the role of each in clock synchronization
(6 marks)
Briefly describe the five typical categories of distributed programming.
(5 Marks)

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