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NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
SEPTEMBER 2021 EXAMINATION

CIT 474 – Introduction to Expert Systems

Credit: 2 Units

Time Allowed: 2 Hours

INSTRUCTIONS: Answer Question 1 and three (3) Others.

 

 

1a). i. Give two (2) different definitions of Expert System. (3 marks)

ii. With the aid of a well-labeled diagram, briefly explain the components of an Expert System. (3 marks)

1b). i. Outline eight (8) Expert System application areas.(4 marks)

1b). ii. Identify a Conversational Speech Interfaces? (1 marks)

1c). i. Distinguish six (6) characteristics of programming languages needed for expert systems work. (3 marks)

1c). ii.MYCIN is an expert system comprised of two major components. Briefly explain them.(2 marks)

1d). i. Draw the Blackboardmodel.(2 marks)

1d). ii. Explain the following terms asassociated with Frame Base Expert System. (4 Marks)

a. Frame

b. Slot

c. Attribute

d. Table

1d) iii.Analyse a shell? (3 marks)

 

2a). Give five (5) advantages of an expert system. (10 Marks)

2b). How can you describe knowledge engineering.(5 marks)

 

3a). Expert systems have many characteristics?, in which “Domain-Specific” is one of them?. “Domain-Specific” means what? (4marks)

3b) Give (5) disadvantages of an expert system. (5 marks)

3c). Systems performance in speech recognition can be affected by a number of factors. Identify three (3). (6 marks)

 

4a). Outline six (6) distinguishing characteristics of programming languagesneeded for expert systems work.(6marks)

4b). Summarize procedural Languages (9 marks)

 

5a). Explain briefly the following.

Knowledge Base (2marks)

Reasoning Engine (2marks)

Knowledge Acquisition subsystem (2marks)

Explanation subsystem (2marks)

User Interface (2marks) (Total 10 marks

5b). In a point, MYCIN expertise lies in what domain? (5 marks)


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