Iterators

1

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);
	    Collections.shuffle(list);
            i.next();
            i.remove();
            while(i.hasNext())
	        System.out.print(i.next() + " ");
        }
    }

A. 2 8 5

B. 2 1 8

C. 2 5 8

D. 8 5 1

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2

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);
	    Collections.sort(list);
            while(i.hasNext())
	        System.out.print(i.next() + " ");
        }
    }

A. 2 8 5 1

B. 1 5 8 2

C. 1 2 5 8

D. 2 1 8 5

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3

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() + " ");
        }
    }

A. 2 8 5 1

B. 1 5 8 2

C. 2

D. 2 1 8 5

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4

What is the output of this program?

 
    import java.util.*;
    class Collection_iterators {
        public static void main(String args[]) {
            ListIterator a = list.listIterator();
                if(a.previousIndex()! = -1)
                    while(a.hasNext())
	                System.out.print(a.next() + " ");
                else
                   System.out.print("EMPTY");
        }
    }

A. 0

B. 1

C. -1

D. EMPTY

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5: Which of these exceptions is thrown by remover() method?

A. IOException

B. SystemException

C. ObjectNotFoundExeception

D. IllegalStateException

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