Consider the following declaration:

LinkedList list = new LinkedList<>();

This declaration implies that the LinkedList class could begin with which of the following code statements?

I public class LinkedList { . . . }

II public class LinkedList { . . . }

III public class LinkedList { . . . }

I only

II and III only

III only

II only

Which of the following satisfies the wildcard ? extends Component?

String

Color

JButton

Scanner

Determine the output of the MyLinkedList generic class code below when the main method executes.

public class MyLinkedList { private MyNode first; public MyLinkedList(E e) { first = new MyNode(); first.data = e; first.next = null; } public E getFirst() { return first.data; } private class MyNode { private E data; private MyNode next; } public static void main(String[] args) { MyLinkedList list = new MyLinkedList<>("Hello"); System.out.println("List first element = " + list.getFirst()); } }

List first element = null

List first element = Hello

compiler error is generated by first = new MyNode();

no output

Which of the following satisfies the wildcard ? extends Object?

I String

II JComponent

III Scanner

I, II and III

II only

I and II only

I only

Consider the following class declaration:

public class SavingsAccount extends BankAccount { . . . }

Which of the following statements about these classes is correct?

There is no relationship between ArrayList and ArrayList

ArrayList is a subclass of ArrayList.

ArrayList is a subclass of ArrayList.

ArrayList extends ArrayList.