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Simulation And Modelling Question Paper
Simulation And Modelling
Course:Bachelor Of Science In Information Technology
Institution: Kca University question papers
Exam Year:2011
UNIVERSITY EXAMINATIONS: 2010/2011
SECOND YEAR STAGE EXAMINATION FOR THE DEGREE OF BACHELOR
OF SCIENCE IN INFORMATION TECHNOLOGY
BIT 2201: SIMULATION AND MODELLING
DATE: APRIL 2011 TIME: 2 HOURS
INSTRUCTIONS: Answer question ONE and any other TWO questions
QUESTION ONE
a) Using the key words: Operating System, Purpose, Simplification and Experimentation, define
Simulation. ( 3 Marks )
b) Using appropriate examples identify four main types of system. ( 8 Marks )
c) Define an operating system as used in simulation and modeling. List the four specific functions of
operating system. (4 Marks)
d) i) Many operating systems are complex. Explain. (3 Marks)
ii) What are the effects of dynamic complexity in a system? (3 Marks)
e) Simulation models are not the only models that can be used for understanding and improving the
real world. There exist other modeling approaches. Why would simulation be used in preference to
these other modeling approaches? (6 Marks)
f) List the three main simulation programming tasks. (3 Marks)
QUESTION TWO
a) Describe five common statistics included in the output report of a simulation programming system.
(10 Marks)
b) The time taken to process print jobs by a computer is given by:
2
Time No.
0-4 3
4-8 8
8-10 15
10-12 19
12-14 9
14-20 6
Test at 5% significant level whether this time follows an exponential distribution. (10 Marks)
QUESTION THREE
a) Define discrete event simulation. (2 Marks)
b) Describe the components found in most discrete event simulation models. (10 Marks)
c) There’s logical organization for the components in (b) above that promotes the programming,
debugging and future changing of the simulation models computer program. Using a well labeled flow
chart, explain, the flow of control among these components. (8 Marks)
QUESTION FOUR
a) Among the most compelling reasons for using simulation are the benefits gained by managers.
Explain any THREE benefits. (9 Marks)
b) Consider a single server queuing system. The system starts at time t=0. The arrival time of
customers is: 0.8, 1.4, 2.7, 3.2, 3.8, 8.0, 8.6, 9.0, 9.2, and 9.8. The departure times are: 2.2, 4.0, 5.0,
6.2, and 10.0. Time is in minutes. The first in first out queuing discipline is followed. Simulate this
system for six clients and estimate:
i) The average delay in the waiting line
ii) The average number of clients in the waiting line at any time t
iii) The expected utilization of server. (11 Marks)
QUESTION FIVE
a) Describe the factors that should be considered in selecting a simulation language. (10 Marks)
b) i) Outline FIVE characteristics of a good random number generator. (5 Marks)
ii) Use a mixed linear congruential random number generator with a=67, m=31, c=17 and
seed X0 = 117 to generate the first FIVE random variates on [0,1]. (5 Marks)
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