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Question


What is the output of this program?


import java.util.*;
class Collection_iterators {
public static void main(String args[]) {
LinkedList list = new LinkedList();
list.add(new Integer(2));
list.add(new Integer(8));
list.add(new Integer(5));
list.add(new Integer(1));
Iterator i = list.iterator();
Collections.reverse(list);
while(i.hasNext())
System.out.print(i.next() + " ");
}
}
Options:
A .  2 8 5 1
B .  1 5 8 2
C .  2
D .  2 1 8 5
Answer: Option B

Collections.reverse(list) reverses the given list, the list was 2->8->5->1 after 


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