Producing robust programs

Producing robust programs

1. defensive desighn

   • protection against unexpected user inputs
   • maintainability
   • minimising/ removing bugs

2. validation

   • all data entered is reasonable and sensible
   • different types of validation
     • type check
     • length check
     • format check
     • range check
     • presence check

3. maintainability

   • reducing the chance of introducing coding mistakes
   • features
     • formatting
     • comments
     • indentation
     • naming conventions

4. testing

   • programming functions as it was desighned
   • meets the needs of the user
   • test strategies
     • itrertive testing
     • final testing
   • test plans
     • valid data
     • invalid data
     • borderline

5. authentication

   • usernames and passwords
   • access rights
   • increasing security
     • update passwords regularly
     • complex passwords
     • limit login attempts