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when a program lets the user know that an invalid choice has been made, this is known as:
by (550 points)  

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The right answer for this question is 'input validation'

Lets see it through c++ code program:

#include <iostream> 

using namespace score;  

int main()  // main function


 int x; 

 cout << "Enter the score: ";

 cin >>x;

 if(x> 50) 


  cout << "You have passed test:";


return 0;


by (290 points)