invalid inputs

invalid inputs. (1) (NBS) Test data that lie outside the domain of the function the program represents. (2) These are not only inputs outside the valid range for data to be input, i.e. when the specified input range is 50 to 100, but also unexpected inputs, especially when these unexpected inputs may easily occur; e.g., the entry of alpha characters or special keyboard characters when only numeric data is valid, or the input of abnormal command sequences to a program.

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