BIT4405  EXPERT SYSTEMS.

UNIVERSITY EXAMINATIONS: 2018/2019
EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN
INFORMATION TECHNOLOGY
BIT 4405: EXPERT SYSTEMS
FULL TIME/PART TIME/DISTANCE LEARNING
DATE: AUGUST, 2019 TIME: 2 HOURS
INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions.

QUESTION ONE
a) What is an Expert System? 2 Marks
b) Advantages of Expert Systems over Human Experts 6 Marks
c) Define an Inference Engine used as part of an Expert System 4 Marks
d) Examine the contents of the Knowledge Base 4 Marks
e) Using examples differentiate between Forward and Backward Chaining
6 Marks
f) How can Linguists help in the development of Expert Systems? 4 Marks.
g) Explain the following concepts 4 Marks
i) The Turing Test
ii) Artificial Intelligence
iii) LISP
iv) Speech Recognition Software
QUESTION TWO
a) Describe the main parts of an expert system. Show how they interact with one another
6 Marks
b) Using two brief examples of knowledge representation, explain how knowledge may be
represented in the knowledge base 6 Marks
c) Describe the advantages and disadvantages of an expert system 4 Marks
d) Why is MYCIN considered important in the development of expert systems and how did
it lead to EMYCIN? 4 Marks
QUESTION THREE
a) What is the main purpose of Expert Systems? 4 Marks
b) What is the main difference between conventional computer programs and production systems
(rule based systems)? 5 Marks
c) Why is a production system model was used to implement the first rule based expert systems?
5 Marks
d) What types of knowledge are used by neural networks and by rule based systems? What kinds of
systems are they with respect to the type of knowledge they use?
6 Marks
QUESTION FOUR
a) Describe the phases of designing an expert system? What term is used to call the whole process?
6 Marks
b) What are the main areas of application of expert systems? 8 Marks
c) Why is knowledge acquisition often referred to as the ES `bottleneck’? 6 Marks
QUESTION FIVE
a) Why do many people say they will not trust a `robo-doc’ medical diagnosis expert system?
8 Marks
b) Describe at least 3 advantages that expert systems offer organisations that would otherwise have
to employ human experts. 8 Marks
c) Examine any two artificial intelligence techniques used in expert systems
4 Marks

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