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National Open University Exam Past Question – CIT 474 October, 2013 Examination

NATIONAL OPEN UNIVERSITY OF NIGERIA CIT 474 Introduction to Expert Systems

14/16, Ahmadu Bello Way, Victoria Island

 

SCHOOL OF SCIENCE AND TECHNOLOGY October, 2013 Examination

 

 

 

Course Code:

 

Course Title:

CIT 474

 

Introduction to Expert Systems

Time:     3hrs

 

Course Credit Unit:

 

 

 

3

Instruction:

 

QUESTIONS

Answer any five (5) questions.    

 

1a. Give a concise description of a ‘shell’ in expert systems.                                                                   (3 marks)

1b. Name the generic components of a shell.                                                                                             (5 marks)

1c. State the main difference between forward chaining and backward chaining.                             (6 marks)

[Total = 14 marks]

2a. Give a brief explanation of the following from the perspective of expert systems:

  1. Blackboard system ii.    Inference engine

iii.   MYCIN

  1. Working memory            3 marks each =                                                                                        (12 marks)

2b. State any 2 advantages of expert systems.                                                                                           (2 marks)

[Total = 14 marks]

3a. Outline the key functions of individuals who interact with expert systems.                                   (12 marks)

3b. Give a concise explanation of how expert systems resolve uncertainties.                                      (2 marks)

[Total = 14 marks]

  1. 4. Answer the questions that follow after going through the figure below:

 

 

4a. What does the figure depict?                                                                                                                   (4 marks)

4b. Specify the major role of the rule parser.                                                                                              (6 marks)

4c. Write down the products of the parser generator.                                                                              (4 marks)

[Total = 14 marks]

5a. Explain the procedure for designing and building a rule engine.                                                      (10 marks)

5b. Name 2 basic ‘Rule Actions’ in expert systems.                                                                                    (4 marks)

[Total = 14marks]

6a. The quality and effectiveness of speech produced by speech synthesizers are based

on a number of characteristics. State any 3 of these characteristics.                                               (6 marks)

6b. Name 2 common forms of inferences.                                                                                                   (4 marks)

6c. State the difference between these 2 forms of inferences.                                                               (4 marks)

[Total = 14 marks]

7a. Explain the concept of the ‘Conversational Speech Interface’.                                                         (6 marks)

7b. List 5 key components of an expert system.                                                                                         (5 marks)

7c. Define the term ‘grammar’.                                                                                                                      (3 marks)

[Total = 14 marks]

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