Question 1

If you do not provide an access specifier for a class member, the class member is given ________ access by default.

Accepted Answer

A)   private
B)   public
C)   protected
D)   packageE) A) and D)
F) A) and C)

Question 2

A class becomes abstract when you place the ________ key word in the class definition.

Accepted Answer

A)   super
B)   extends
C)   final
D)   abstractE) A) and D)
F) A) and B)

Question 3

Which of the following statements declares Salaried as a subclass of PayType?

Accepted Answer

A)   public class Salaried implements PayType
B)   public class PayType derives Salaried
C)   public class Salaried extends PayType
D)   public class Salaried derivedFrom(Paytype) E) B) and C)
F) None of the above

Question 4

This key word indicates that a class inherits from another class.

Accepted Answer

A)   final
B)   super
C)   implements
D)   extendsE) A) and D)
F) All of the above

Question 5

If a method in a subclass has the same signature as a method in the superclass, the subclass method ________ the superclass method.

Accepted Answer

A)   inherits
B)   overrides
C)   overloads
D)   implementsE) A) and C)
F) A) and B)

Question 6

Which of the following statements correctly specifies two interfaces?

Accepted Answer

A)   public class ClassA implements [Interface1, Interface2]
B)   public class ClassA implements (Interface1, Interface2) 
C)   public class ClassA implements Interface1 | Interface2
D)   public class ClassA implements Interface1, Interface2E) A) and C)
F) A) and B)

Question 7

A protected member of a class may be directly accessed by

Accepted Answer

A)   methods of the same class.
B)   methods of a subclass.
C)   methods in the same package.
D)   All of the aboveE) B) and C)
F) A) and D)

Question 8

In object-oriented programming, ________ allows you to extend the capabilities of a class by creating another class that is a specialized version of it.

Accepted Answer

A)   prototyping
B)   code reusability
C)   inheritance
D)   data hidingE) A) and C)
F) A) and B)

Question 9

You can use this operator to determine whether an object is an instance of a particular class.

Accepted Answer

A)   equals
B)   instanceof
C)   >>
D)   isaE) None of the above
F) A) and C)

Question 10

If ClassC is derived from ClassB, which is derived from ClassA, this would be an example of

Accepted Answer

A)   a chain of inheritance.
B)   linear inheritance.
C)   multiple interfaces.
D)   cascading classes.E) A) and B)
F) A) and C)

Question 11

When one object is a specialized version of another object, there is this type of relationship between them.

Accepted Answer

A)   "is a"
B)   "contains a"
C)   "has a"
D)   "consists of"E) B) and C)
F) A) and D)

Question 12

When an "is a" relationship exists between objects, it means that the specialized object has

Accepted Answer

A)   some of the characteristics of the general class, but not all, plus additional characteristics.
B)   some of the characteristics of the general object, but not all.
C)   none of the characteristics of the general object.
D)   all the characteristics of the general object, plus additional characteristics that make it special.E) A) and B)
F) A) and C)

Question 13

You can write a super statement that calls a superclass constructor, but only in the subclass's constructor.

Accepted Answer

A) True 
 B)False

Question 14

You show inheritance in a UML diagram by connecting two classes with a line that has an open arrowhead that points to the subclass.

Accepted Answer

A) True 
 B)False

Question 15

A ________ member's access is somewhere between private and public.

Accepted Answer

A)   package
B)   final
C)   protected
D)   staticE) All of the above
F) None of the above

Question 16

When an "is a" relationship exists between objects, it means that the specialized object has all of the characteristics of the general object, plus additional characteristics that make it special.

Accepted Answer

A) True 
 B)False

Question 17

An abstract class is not instantiated itself, but serves as a superclass for other classes.

Accepted Answer

A) True 
 B)False

Question 18

In a UML diagram, you show a realization relationship by connecting a class and an interface with a

Accepted Answer

A)   dashed line that has an open arrowhead at one end.
B)   line that has an open diamond at one end.
C)   dashed line.
D)   line that has an open arrowhead at one end.E) All of the above
F) A) and D)

Question 19

When a method is declared with the ________ modifier, it cannot be overridden in a subclass.

Accepted Answer

A)   final
B)   super
C)   void
D)   publicE) B) and C)
F) A) and D)

Question 20

In ________, inheritance is shown with a line that has an open arrowhead at one end that points to the superclass.

Accepted Answer

A)   pseudocode
B)   UML diagrams
C)   CRC cards
D)   hierarchy chartsE) A) and B)
F) None of the above

Exam 9: Inheritance

When one object is a specialized version of another object, there is this type of relationship between them.

Correct AnswerverifiedShow Answer

In a UML diagram, you show a realization relationship by connecting a class and an interface with a

Correct AnswerverifiedShow Answer

You show inheritance in a UML diagram by connecting two classes with a line that has an open arrowhead that points to the subclass.

Correct AnswerverifiedShow Answer

A protected member of a class may be directly accessed by

Correct AnswerverifiedShow Answer

When a method is declared with the ________ modifier, it cannot be overridden in a subclass.

Correct AnswerverifiedShow Answer

When an "is a" relationship exists between objects, it means that the specialized object has all of the characteristics of the general object, plus additional characteristics that make it special.

Correct AnswerverifiedShow Answer

When an "is a" relationship exists between objects, it means that the specialized object has

Correct AnswerverifiedShow Answer

A ________ member's access is somewhere between private and public.

Correct AnswerverifiedShow Answer

You can write a super statement that calls a superclass constructor, but only in the subclass's constructor.

Correct AnswerverifiedShow Answer

If a method in a subclass has the same signature as a method in the superclass, the subclass method ________ the superclass method.

Correct AnswerverifiedShow Answer

A class becomes abstract when you place the ________ key word in the class definition.

Correct AnswerverifiedShow Answer

Which of the following statements correctly specifies two interfaces?

Correct AnswerverifiedShow Answer

You can use this operator to determine whether an object is an instance of a particular class.

Correct AnswerverifiedShow Answer

In object-oriented programming, ________ allows you to extend the capabilities of a class by creating another class that is a specialized version of it.

Correct AnswerverifiedShow Answer

In ________, inheritance is shown with a line that has an open arrowhead at one end that points to the superclass.

Correct AnswerverifiedShow Answer

If ClassC is derived from ClassB, which is derived from ClassA, this would be an example of

Correct AnswerverifiedShow Answer

An abstract class is not instantiated itself, but serves as a superclass for other classes.

Correct AnswerverifiedShow Answer

Which of the following statements declares Salaried as a subclass of PayType?

Correct AnswerverifiedShow Answer

If you do not provide an access specifier for a class member, the class member is given ________ access by default.

Correct AnswerverifiedShow Answer

This key word indicates that a class inherits from another class.

Correct AnswerverifiedShow Answer

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