2.3 Prducing Robust Problems

2.3 Prducing Robust Problems

1. Defence Design

   • Anticipating misuse of the program and planning for things that could go wrong
   • Writing maintainable code that helps other diagnose problems if they arise

2. Producing robust programs so that they are defensive against hacks and attacks.

   • Data Validation: check to ensure that the data entered is sensible and reasonable. It does not check the accuracy of data.
   • Data Sanitisation: Trims or strips strings, removing unwanted characters to make sure it contains only permitted characters . E.g. Da%ve the % would be removed.
   • Authentication: The process of verifying the identify of a user or process
   • Maintainability : Updating code so that it is compatible with current requirements
   • Comments: To help describe the code and structures in a program using #
   • Indentation: used to show the programs structure e.g. where selection or iteration or functions are used .

3. Iterative and final testing

   • Iterative testing: This happens overtime and is repeated throughout the development of the program
   • Final/terminal testing: is when the product is released and real end users begin using it. Very often, end users find things wrong with systems that the programmers did not expect.