User-defined Functions in C Language

This Test will cover Function in C Langauge, including types of function, user-defined function, function with argument etc.
Q. What error would the following function give on compilation?
fun(int a, int b)
    int a = 20;
    return a;
Q. In C language all function except main() can be recursive?
Q. Which keyword is used to transfer control from a function back to the calling function?

Q. Which of the following statements are correct about the function?
int fun(int x)
    int r = 1;
        return 1;
        r = x * fun(x-1);
    return r;
Q. Functions cannot return more than one value at a time. True or False?
Q. Which of the following statement is true about a function with an argument?
Q. A function can be defined inside another function. True or False?

Q. Usually recursion works slower than loops. True or False?
Q. A variable declared inside a function without any specification is by default __________?
Q. __________ variable is initialized only once and remains into existence till the end of program?

Having second thoughts for any code related question?

Try executing the code in our Code Playground