BIT 4405 EXPERT SYSTEMS.

UNIVERSITY EXAMINATIONS 2017/2018
EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN
INFORMATION TECHNOLOGY
BIT 4405: EXPERT SYSTEMS
FULL TIME/PART TIME/DISTANCE LEARNING
DATE: DECEMBER, 2017 TIME: 2 HOURS
INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions.

QUESTION ONE
a) Explain the following concepts
i) Expert system 2 Marks
ii) Artificial intelligence 2 Marks
iii) Turing test 2 Marks
iv) Knowledge-based systems 2 Marks
b) Explain the features of an expert system 8 Marks
QUESTION TWO
a) Explain the benefits of using rules 6 Marks
b) Elaborate on the initial idea of production system as given by Post 4 Marks
c) Explain the operating principle of the inference engine 6 Marks
d) Given the following rules:
R1:If corn is grown on poor soil, then it will rot.
R2:If soil hasn’t enough nitrogen, then it is poor soil
Explain how the rules will be applied in forward chaining and backward chaining
4Marks
QUESTION THREE
a) Discuss the need for heuristic reasoning in knowledge based systems 6 Marks
b)
The function of a financial advisor is to help the user decide whether to invest in a savings
account, or the stock market, or both. The recommended investment depends on the investor’s
income and the current amount they have saved:
Individuals with inadequate savings should always increase the amount saved as their first
priority, regardless of income.
Individuals with adequate savings and an adequate income should consider riskier but potentially
more profitable investment in the stock market.
Individuals with low income who already have adequate savings may want to consider splitting
their surplus income between savings and stocks, to increase the cushion in savings while
attempting to increase their income through stocks
The adequacy of both savings and income is determined by the number of dependants an
individual must support.There must be at least £3000 in the bank for each dependant. An
adequate income is a steady income, and it must supply at least £9000 per year, plus 2500
dependant for each dependant
Required:
Produce an AND-OR graph for the provided information 14 Marks
QUESTION FOUR
a) Differentiate between inference and explanation 4 Marks
b) Describe the recognize-act cycles as facilitated by the inference engine 7 Marks
c) Discuss any three different areas of application of Bayesian system 9 Marks
QUESTION FIVE
a) Explain the CLIPS primitive data types 8 Marks
b) Explain the general format of a rule in CLIPS 4 Marks
c) Explain the following code snippet 4 Marks
d) CLIPS allows information to be read from the keyboard using the read function. Using a
code snippet show how this can be achieved. 4 Marks

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