Java #Q1: What would be the output?

public class Test
{
     public void method1(Object o)
     {
          System.out.print("object");
     }
    public void method1(String s)
    {
          System.out.print("string");
    }
    public static void main(String[] args)
    {
           Test t = new Test();
           t.method1(null);
    }
}

When running the program, the output would be
(a) object
(b) string
(c) objectstring
(d) stringobject


Answer:
(b) string

Explanation:
It is the hierarchy of objects being searched for a match, which is quite similar to the exception objects of catch blocks. The search process is done in the bottom-up manner wherein the object of class of least node is searched first and its continued upwards to the super/parent classes till the end is reached.