2.3.2

• Syntax errors-

  • Getting the 'grammar' or rules of the programming language wrong
  • It will not run
  • When the compiler or interpreter doesn't understand something
• Logic errors-

  • Code will run
  • Output/outcome is not what expected
  • Misplaced brackets in calculations
  • Iterations that loop incorrectly
  • Variables in wrong locations
• Iterative testing:

  • Tests that are carried out during the development of the program
  • Often a programmer will test a module, fix any errors they find then test it again. They will repeat the process until the module is working correctly
• Final testing:

  • Carried out at the end of the programs completion
  • The whole program is tested at the same time to check that it's working properly
• Normal data:

  Things that the user is likely to input into the program
• Boundary data:

  Values at the limit of what the program should be able to handle
• Invalid data:

  Inputs with a correct data type that should be rejected by the program
• Erroneous data:

  Inputs with an incorrect data type that should be rejected by the program