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Anytime a program variable allows user input, the programmer should take steps to ensure that each of the following conditions is met: select 3

The user can’t enter a value longer than the size of any buffer that will hold it (for example, a 10-letter word into a 5-letter string variable).

Limit the types of data a user provides in a form.

The user can’t enter a value that will cause the program to operate outside of its specified parameters (for example, answer a “yes” or “no” question with “maybe”).

The user can’t enter an invalid value for the variable types that will hold it (for example, a letter into a numeric variable).

Explanation

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