SCJP Module-9 Question-10

The given program will test your knowledge of Queue Interface and LinkedList class of the collection framework.

The given program will test your knowledge of Queue Interface and LinkedList class of the collection framework.

Given below the sample code :

import java.util.LinkedList;
import java.util.Queue;
public class Check {
public static void main(String... args) {
Queue<String> que = new LinkedList<String>();
que.add("Delhi");
que.add("Mumbai");
que.add("Dhaka");
show(que);
}
public static void show(Queue q) {
que.add(new Integer(12));
while (!que.isEmpty ( ) )
System.out.print(que.poll() + " ");
}
}

What will be the output of the above code ?

1. Compile error

2. Delhi Mumbai Dhaka 12

3. Delhi Mumbai Dhaka

4. Delhi Mumbai