When a program lets the user know that an invalid input choice has been made, this is known as

The correct answer for the given question is " input validation"

Explanation:

Input validation is also known as data validation which is used for validate or test the user input .

The example of input validation in c++ programming

#include <iostream> // header file

using namespace std;  

int main()  // main function

{

 int a1; // variable declarartiomn

 cout << "Enter the age: ";

 cin >> a1;

 if(a1> 18) // validate user input

 {

  cout << "You are eligible for vote :";

 }

return 0;

}

In this program we input a age from user and validate this user input that .If user enter age > 18 then it will eligible for vote.

output

21

You are eligible for vote