Test data: Erroneous - GCSE Computer Science Definition

Test data: Erroneous refers to data intentionally created or selected to check how a computer program handles incorrect or unexpected inputs. When you are testing a program, you use erroneous data to see if it can correctly identify mistakes or unusual input and respond appropriately, such as showing an error message or rejecting the input. This is important because it helps ensure that software is reliable and can handle real-world situations where users might make typing errors or enter data that doesn't fit the expected format.