Please answer for this question

Question

public class Qcb90 {
int a;
int b;
public void f() {
a = 0;
b = 0;
int[] c = { 0 };
g(b, c);
System.out.println(a + " " + b + " " + c[0] + " ");
public void g(int b, int[] c) {
a = 1;
b = 1;
c[0] = 1;
public static void main(String[] args) {
Qcb90 obj = new Qcb90();
obj.f();
I answered 001 as o/p
But the o/p is 101
How can this be possible.

Answer 1

First I have to say: whoever wrote this code need some extensive lessons in HUMAN FRIENDY CODE. Use useful variables name other than one letter.
You have two methods:
Method f
And method g.
You have to global or public variables a and b.
Now, in the main method you call the first method f () which assigns zeros to the public variables a and b. it also creates a new array c[] with one slot containing the number 0;
After that, you call the method g. and pass both b and c[]. Notice that you have over ridden the values of b and c[] because you redefined them again in the header of the method
public void g(int b, int[] c)So now both b and c[] are not initialized and contain basically nothing.
Inside the g() method, you assign the public variable a with 1, and the ENTERNAL variable b with 1 (note that b now is not the same after it has been redefined again in the header of the g() method).
After this, you have printed the out put. a = 1, b = 0, c = 1.