What is the output from the following code(Vector class)? : Questions « Utility Classes « SCJP

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import java.util.*;
      class Question {
       public static void main(String args[]) {
        String s1 = "abc";
        String s2 = "def";
        Vector v = new Vector();
        v.add(s1);
        v.add(s2);
        String s3 = v.elementAt(0) + v.elementAt(1);
        System.out.println(s3);
       }
      }