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6 marksSystems Analysis and Design

CAPE Computer Science Unit 2 · 2006 · Paper 2 · Question 5(a)

A GUI application calculates simple interest and monthly instalments on bank loans using user-entered principal amount, interest rate (percentage), and loan term (years). Simple Interest = (Principal * Rate * Time) / 100. Monthly Instalment = (Principal + Simple Interest) / (Time * 12). A GUI object L allows selecting a loan term from 1 to 30 years without typing.

Identify the GUI objects to use in this application and state the purpose of each.

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Other parts of this question

  1. 5(b)Draw the GUI layout and label the GUI components identified in 5(a).[4 marks]
  2. 5(c)Explain TWO events that the program should anticipate.[4 marks]
  3. 5(d)Write the code to instantiate GUI object L, populate it with the numbers 1 to 30, and add it to the GUI.[6 marks]
  4. 5(e)Write code to retrieve user inputs, calculate the Simple Interest, and display the result in the corresponding GUI component.[6 marks]
  5. 5(f)Using the calculated Simple Interest from 5(e), write code to compute the monthly instalment and display it in the appropriate GUI component.[4 marks]

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