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National Open University Exam Past Question – DAM 462 OCTOBER/NOVEMBER 2014 EXAMINATION

NATIONAL OPEN UNIVERSITY OF NIGERIA

1416 AHMADU BELLO WAY, VICTORIA ISLAND LAGOS SCHOOL OF SCIENCE AND TECHNOLOGY OCTOBER/NOVEMBER 2014 EXAMINATION

 

COURSE CODE:       DAM 462

COURSE TITLE:       AGRICULTURAL DATA SYSTEMS CREDIT UNIT:         2 CREDIT UNITS

INSTRUCTION:        ANSWER ANY FIVE QUESTIONS IN ALL

 

  1. Explain briefly the following terms:
  2. I. Computer simulation models (2 marks) II.      Scale simulation models (2 marks)

 

Using tables, highlight the differences and similarities between system design method and Object Oriented system design method (10 Marks)

 

  1. Outline the purposes of System Models as postulated by Schoemaker (4 Marks) Discuss briefly the modular design method (10 marks).

 

  1. List and explain 4 agricultural database construction models (8 marks).

With the aid of a diagram, briefly discuss the 4 stages involved in the construction of agricultural database systems (6marks).

 

  1. Briefly discuss the meaning and scope of decision support systems (10 marks).

List 4 requirements of a high level decision support system (4 marks).

 

  1. With the aid of at least one example each, list and explain briefly 3 issues that motivate the need for better information to optimize agricultural systems. (8 marks)

Explain briefly i) Site map ii) Expert System(6 Marks)

 

  1. Highlight two (2) application of Expert system technology in the agricultural sector (4
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Marks)

With the aid of a diagram alone, identify the phases/steps in the design process of a decision support system (10 marks)

 

  1. List and explain briefly the 3 components of a design method (6 marks).

 

With the use of examples, briefly discuss the 4 eras of digital computing (8 marks).

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