Question 1

When a subclass overrides a superclass method, only the subclass's version of the method can be called with a subclass object.

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

A)  dashed line with an open arrowhead at one end 
B)  line with an open diamond at one end 
C)  dashed line 
D)  line with an open arrowhead at one end 
A)  dashed line with an open arrowhead at one end 
B)  line with an open diamond at one end 
C)  dashed line 
D)  line with an open arrowhead at one end

Question 4

Because the subclass is more specialized than the superclass, it is sometimes necessary for the subclass to replace inadequate superclass methods with more suitable ones.

Accepted Answer

A) True 
 B)False

Question 5

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)  Any of these 
A)  methods of the same class 
B)  methods of a subclass 
C)  methods in the same package 
D)  Any of these

Question 6

When a class contains an abstract method, you cannot create an instance of the class.

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

A)  super 
B)  extends 
C)  final 
D)  abstract 
A)  super 
B)  extends 
C)  final 
D)  abstract

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

All methods specified by an interface are

Accepted Answer

A)  private 
B)  public 
C)  protected 
D)  static 
A)  private 
B)  public 
C)  protected 
D)  static

Question 10

A subclass can directly access

Accepted Answer

A)  only protected and private members of the superclass 
B)  all members of the superclass 
C)  only public and private members of the superclass 
D)  only public and protected members of the superclass 
A)  only protected and private members of the superclass 
B)  all members of the superclass 
C)  only public and private members of the superclass 
D)  only public and protected members of the superclass

Question 11

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 | Interface2 
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 | Interface2

Question 12

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)  a UML diagram 
C)  a CRC card 
D)  a hierarchy chart 
A)  pseudocode 
B)  a UML diagram 
C)  a CRC card 
D)  a hierarchy chart

Question 13

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) 
A)  public class Salaried implements PayType 
B)  public class PayType derives Salaried 
C)  public class Salaried extends PayType 
D)  public class Salaried derivedFrom(PayType)

Question 14

In Java, a reference variable is __________ because it can reference objects of types different from its own, as long as those types are related to its type through inheritance.

Accepted Answer

A)  static 
B)  dynamic 
C)  polymorphic 
D)  public 
A)  static 
B)  dynamic 
C)  polymorphic 
D)  public

Question 15

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 hiding 
A)  prototyping 
B)  code reusability 
C)  inheritance 
D)  data hiding

Question 16

What type of relationship exists between two objects when one object is a specialized version of another object?

Accepted Answer

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

Question 17

A(n) __________ method is a method that appears in a superclass but expects to be overridden in a subclass.

Accepted Answer

A)  abstract 
B)  protected 
C)  static 
D)  overloaded 
A)  abstract 
B)  protected 
C)  static 
D)  overloaded

Question 18

In the following statement, which is the superclass? public class ClassA extends ClassB implements ClassC

Accepted Answer

A)  ClassA 
B)  ClassB 
C)  ClassC 
D)  both ClassB and ClassC are superclasses 
A)  ClassA 
B)  ClassB 
C)  ClassC 
D)  both ClassB and ClassC are superclasses

Question 19

Which key word indicates that a class inherits from another class?

Accepted Answer

A)  final 
B)  super 
C)  implements 
D)  extends 
A)  final 
B)  super 
C)  implements 
D)  extends

Question 20

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

Accepted Answer

A)  final 
B)  super 
C)  void 
D)  public 
A)  final 
B)  super 
C)  void 
D)  public

When a subclass overrides a superclass method, only the subclass's version of the method can be called with a subclass object.

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

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

Because the subclass is more specialized than the superclass, it is sometimes necessary for the subclass to replace inadequate superclass methods with more suitable ones.

A protected member of a class may be directly accessed by

When a class contains an abstract method, you cannot create an instance of the class.

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

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

All methods specified by an interface are

A subclass can directly access

Which of the following statements correctly specifies two interfaces?

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

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

In Java, a reference variable is __________ because it can reference objects of types different from its own, as long as those types are related to its type through inheritance.

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

What type of relationship exists between two objects when one object is a specialized version of another object?

A(n) __________ method is a method that appears in a superclass but expects to be overridden in a subclass.

In the following statement, which is the superclass? public class ClassA extends ClassB implements ClassC

Which key word indicates that a class inherits from another class?

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

Introduction to Computers and Java

Java Fundamentals

A First Look at Classes and Objects

Decision Structures

Loops and Files

A Second Look at Classes and Objects

Arrays and the Arraylist Class

Text Processing and Wrapper Classes

Exceptions and Advanced File Io

Java-Fx: Gui Programming and Basic Controls

Java-Fx: Advanced Controls

Java-Fx: Graphics, Effects, and Media

Recursion

Databases

Filters

Exam 9: Inheritance

When a subclass overrides a superclass method, only the subclass's version of the method can be called with a subclass object.

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

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

Because the subclass is more specialized than the superclass, it is sometimes necessary for the subclass to replace inadequate superclass methods with more suitable ones.

A protected member of a class may be directly accessed by

When a class contains an abstract method, you cannot create an instance of the class.

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

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

All methods specified by an interface are

A subclass can directly access

Which of the following statements correctly specifies two interfaces?

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

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

In Java, a reference variable is __________ because it can reference objects of types different from its own, as long as those types are related to its type through inheritance.

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

What type of relationship exists between two objects when one object is a specialized version of another object?

A(n) __________ method is a method that appears in a superclass but expects to be overridden in a subclass.

In the following statement, which is the superclass? public class ClassA extends ClassB implements ClassC

Which key word indicates that a class inherits from another class?

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

Introduction to Computers and Java

Java Fundamentals

A First Look at Classes and Objects

Decision Structures

Loops and Files

A Second Look at Classes and Objects

Arrays and the Arraylist Class

Text Processing and Wrapper Classes

Exceptions and Advanced File Io

Java-Fx: Gui Programming and Basic Controls

Java-Fx: Advanced Controls

Java-Fx: Graphics, Effects, and Media

Recursion

Databases

Filters