Which of the following is the below pseudo-code an example of? IF VARIABLE (CONTAINS NUMBERS = TRUE) THEN EXIT

Buffer overflow prevention focuses on enforcing memory boundary limits on input length, not on checking the data type or content of a variable.

Input validation is the practice of checking data against expected formats, types, or ranges before processing it. The pseudocode explicitly tests whether a variable contains numbers and exits if that condition is met, preventing undesired input from propagating through the system - a direct implementation of an input validation gate.

CSRF prevention uses techniques such as synchronizer tokens or SameSite cookies to stop unauthorized cross-site requests, which has no relation to variable content inspection.

XSS prevention involves encoding or sanitizing output rendered in a browser to block injected scripts, not checking whether a variable contains numeric characters.