Choose the most correct answer to all the following questions.

1. All fields and methods of the parent (super) class are inherited by the child class.

   1.   ?    True
   2.   ?    False

2. An interface may contain fields, methods and constants.

   1.   ?    True
   2.   ?    False

3. A class that implements an interface but does not override all methods of the interface must be declared as abstract.

   1.   ?    True
   2.   ?    False

4. An abstract method must terminate its method signature with a semi-colon.

   1.   ?    True
   2.   ?    False

5. A child class may extend (define) multiple parent (super) classes in it's class signature.

   1.   ?    True
   2.   ?    False

6. What is the super class of all Java classes?

   
   
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7. What method is invoked (called) when an object is supplied as the argument for the println method?

   
   
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8. The invoked method from question 7 is inherited from which class?

   
   
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9. Which two elements may be contained in an interface.

   1.   ?    methods and constants
   2.   ?    abstract methods and constants
   3.   ?    methods and abstract fields
   4.   ?    methods and constant fields

10. The two main reasons for using inheritance are:

    1.   ?    code reuse and inheritance
    2.   ?    code reuse and interface
    3.   ?    interface and inheritance
    4.   ?    code reuse and polymorphism

11. Polymorphism may be implemented using ________ or ________ .

    1.   ?    code reuse
    2.   ?    inheritance and interface
    3.   ?    interface and abstract methods
    4.   ?    inheritance and abstract methods

12. A child class is responsible for initializing fields of it's

    1.   ?    super class
    2.   ?    parent class
    3.   ?    classes
    4.   ?    child class

13. The first statement in the child class constructor must be a ________ to the super class ________.

    1.   ?    constructor, object
    2.   ?    statement, constructor
    3.   ?    call, method
    4.   ?    call, constructor

14. The ________ keyword is used in the child class signature to implement inheritance.

    
    
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15. The ________ keyword is used in the class signature to indicate that a class uses an interface.

    
    
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16. A class incorporates (uses) an interface. The class does not override all methods from the interface. Because of this, the class must be declared as ________.

    
    
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