Testing and Trace Tables

Functionality testing - A type of testing that assesses how well a program meets the requirements 

Iterative testing - Repeated testing done during the development of a program 

Test data - Inputs that are chosen to see if a program is behaviour as intended

Valid - Data that is acceptable within the logic of the program.

Normal data  - A type of test data that simulates the inputs that user are likely to enter

Extreme data - Data at the extreme end of the range for acceptable (valid) or unacceptable (invalid).

Erroneous - Data that is not acceptable within the logic of a program, for example the wrong data type.

Rogue value - A value that will not occur as normal input and which is used to interrupt a process.

Trace Table - A trace table is a technique used to test algorithms in order to make sure that no logical errors occur while the calculations are being processed