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Language Fundamentals - Programming

Q1:

What will be the output of the program? 
public class CommandArgsTwo 
{
    public static void main(String [] argh) 
    {
        int x;
        x = argh.length;
        for (int y = 1; y <= x; y++) 
        {
            System.out.print(' ' + argh[y]);
        }
    }
}
and the command-line invocation is > java CommandArgsTwo 1 2 3

A 0 1 2

B 1 2 3

C 0 0 0

D An exception is thrown at runtime

ANS:A - 0 1 2

An exception is thrown because at some point in (System.out.print(' ' + argh[y]);), the value of x will be equal to y, resulting in an attempt to access an index out of bounds for the array. Remember that you can access only as far as length - 1, so loop logical tests should use x < someArray.length as opposed to x < = someArray.length.