August
1999 QUESTION 2 Total Marks: 20 Marks |
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| (a) | List two important criteria which must be
taken into account when determining a design for improving system performance.
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[2] |
| (b) | Illustrate, using data flow diagrams, the
following steps in deriving a logical model of a new system; (i) Resequence the activities to improve productivity. (ii) Reduce data redundancy to achieve higher data integrity. (iii) Introduce new controls to enhance the flow of the system. (iv) Simplify the process to reduce the turnover processing time.
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[3] [3] [3] [3] |
| (c) | (i) List two characteristics of real-time
systems. (ii) What are the differences between soft and hard real-time processes? (iii) Give two examples of applications which are suited to batch processing, rather than real-time processing.
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[2] [2] [2] |