December 1998
SD206: SYSTEMS DESIGN

QUESTION 3

Total Marks: 20 Marks

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SUGGESTED SOLUTIONS
for Question 3

 
(a) In the context of an information system, what are the controls and why are they needed?

 

 [2]
(b) List three specific needs which controls help to enforce.

 

 [3]
(c) Describe the use of data entry controls in the following types of system: [2]
(i) Batch processing systems. [2]
(ii) Real-time systems.

 
(d) Describe the following types of control:
(i) Communication controls. [2]
(ii) Audit trails. [2]
(iii) Output controls.

 

 [2]
(e) Describe the purpose of the following types of documentation:
(i) System and program documentation. [1]
(ii) Operations documentation. [1]
(iii) User documentation.

 

 [1]
(f) Why is it important to update documentation to reflect current procedures each time a change to the documented system is made? [2]