NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
JUNE/JULY 2013 EXAMINATION

Q1.a     State the form of knowledge represented below:

                        IF he has a shave

THEN he will look smart (2 marks)       

      b.   Give a brief description of each of the following terms in the context of expert systems:

(i)        Class

(i)        Slot  

(iii)      Facet

(iv)      Frame  (3 marks each)

Q2.a     Explain the procedure for designing and building a rule engine. (10 marks)  

      b.   State or Mention 2 common ‘Rule Actions’ in expert systems. (4 marks)        

Q3.       Give a brief description of each of the following:

1. MYCYN
2. Speech Synthesizer
3. Natural Language
4. Working Memory (3 marks each)

      e.   Specify the major means through which users communicate with expert systems. (2 marks)    

Q4.a     Expert systems are said to be essentially interactive systems. Explain. (6 marks)

      b.   Mention 2 common forms of inferences and state their differences. (8 marks)    

Q5.       List and describe the components of a shell. Use a well-labelled diagram to illustrate

your points. (14 marks)

Q6.a     Identify the main role of each of the following key words within the context of the Explanation Facility:

1. TRACE
2. WHY
3. HOW
4. WHAT-IF 

     e.    Explain the term ‘grammar’. (2 marks)

Q7.a     State the specific roles of individuals who interact with expert systems. (12 marks)

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