What term refers to data that a program isn't designed to accept?

The term "erroneous data" specifically refers to input that is incorrect or not valid according to the requirements set by a program. Such data can occur due to user error, system glitches, or data corruption, and it is not suitable for processing by the program. Programs are typically structured to process a specific type and range of data, so when data falls outside these parameters – for instance, if it contains characters where numbers are expected – it is deemed erroneous.

In contrast, error diagnostics pertain to the processes or tools used to identify and remedy errors or issues within a program. Extreme data refers to inputs at the outer limits of acceptable ranges, which is not the same as data that the program cannot handle at all. File handling involves the methods to read, write, and manage files in code, also not related to the acceptance of data types.