What is the output of the following program when the method is called with 4?

void unknown (int n)

{

if (n>0)

{

System. out. print ("?");

unkown (n-1);

}

}

A. None of the other answers

B.?

C.?

D.?

A.

Explanation:

void unknown (int n) defines a methodes that doesn't return a value, hence unknow (int n) is a function ... it is function that prints the value? as many times as you tell it, hence for n=4 it would print?. However, it doesn't return a value an interger, string etc ..., so it doesn't give an output.