Inheritance: Inheritance is the concept of inheriting the members and properties of a base class from the derived class. The main advantages of inheritance are, Code reusability and fast implementation. Reduces the size of the program code. There are five types of inheritance: Single inheritance Multiple inheritance Hierarchical inheritance Multilevel inheritance Hybrid inheritance If a subclass inherits a base class, then the member functions and data members of the super class can be accessed by the derived class. But the derived class does not inherit the constructors from the base classes; each derived class should contain individual constructors. Method Overriding: Overriding is a feature that allows a child class or subclass to specifically implement a method that already provided by one of its parent classes or super classes. If the method of the subclass has name, parameters and return type as same as the method in the super class, then the method in the subclass is said to override the method in the super-class. Instance variable: Instance variables are the class members declare outside of any constructor, method or block. The instance variables are created when an object of the class is created. And the instance variable destroys when the object is destroyed. Zero (“0”) is the default value of an instance variable. The instance variables can be accessed only using the objects of the class.

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Answer 1

Question

Chapter 9, Problem 1RE

Program Plan Intro

Inheritance:

Inheritance is the concept of inheriting the members and properties of a base class from the derived class.

The main advantages of inheritance are,

Code reusability and fast implementation.

Reduces the size of the program code.

There are five types of inheritance:

Single inheritance

Multiple inheritance

Hierarchical inheritance

Multilevel inheritance

Hybrid inheritance

If a subclass inherits a base class, then the member functions and data members of the super class can be accessed by the derived class.

But the derived class does not inherit the constructors from the base classes; each derived class should contain individual constructors.

Method Overriding:

Overriding is a feature that allows a child class or subclass to specifically implement a method that already provided by one of its parent classes or super classes.

If the method of the subclass has name, parameters and return type as same as the method in the super class, then the method in the subclass is said to override the method in the super-class.

Instance variable:

Instance variables are the class members declare outside of any constructor, method or block.

The instance variables are created when an object of the class is created. And the instance variable destroys when the object is destroyed.

Zero (“0”) is the default value of an instance variable.

The instance variables can be accessed only using the objects of the class.

Expert Solution & Answer

Explanation of Solution

a.

Subclasses of “Employee”:

The subclasses of the class “Employee” are, “HourlyEmployee” and “SalariedEmployee”. The class “HourlyEmployee” represents an employee who have been paid hourly. The class “SalariedEmployee” represents an employee who have been paid monthly.

b.

Superclasses of “Manager”:

The superclass of the class “Manager” is, “SalariedEmployee”. The class “Manager” is an employee who have been paid monthly.

c.

Super classes and subclasses of “SalariedEmployee”:

The superclass of the class “SalariedEmployee” is, “Employee”. And subclass of the class “SalariedEmployee” is “Manager”. These classes possess a multilevel inheritance.

d.

Class that override the method “weeklyPay” of “Employee” class:

The class “HourlyEmployee” and “SalariedEmployee” overrides the method “weeklyPay” of the class “Employee”. This is because, the “weeklyPay()” is specific in “HourlyEmployee” and “SalariedEmployee” as it calculates weekly pay for hourly employees and salaried employees separately. So, this method needs to be overridden in these classes.

e.

Class that override the method “setName” of “Employee” class:

None of the subclasses of “Employee” overrides the method “setName()”.

f.

Instance variables of “HourlyEmployee” object:

The instance variables of the class “HourlyEmployee” are, “name” and “hourlyWage”.

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Answer 2

Question

Chapter 9, Problem 1RE

Program Plan Intro

Inheritance:

Inheritance is the concept of inheriting the members and properties of a base class from the derived class.

The main advantages of inheritance are,

Code reusability and fast implementation.

Reduces the size of the program code.

There are five types of inheritance:

Single inheritance

Multiple inheritance

Hierarchical inheritance

Multilevel inheritance

Hybrid inheritance

If a subclass inherits a base class, then the member functions and data members of the super class can be accessed by the derived class.

But the derived class does not inherit the constructors from the base classes; each derived class should contain individual constructors.

Method Overriding:

Overriding is a feature that allows a child class or subclass to specifically implement a method that already provided by one of its parent classes or super classes.

If the method of the subclass has name, parameters and return type as same as the method in the super class, then the method in the subclass is said to override the method in the super-class.

Instance variable:

Instance variables are the class members declare outside of any constructor, method or block.

The instance variables are created when an object of the class is created. And the instance variable destroys when the object is destroyed.

Zero (“0”) is the default value of an instance variable.

The instance variables can be accessed only using the objects of the class.

Expert Solution & Answer

Explanation of Solution

a.

Subclasses of “Employee”:

The subclasses of the class “Employee” are, “HourlyEmployee” and “SalariedEmployee”. The class “HourlyEmployee” represents an employee who have been paid hourly. The class “SalariedEmployee” represents an employee who have been paid monthly.

b.

Superclasses of “Manager”:

The superclass of the class “Manager” is, “SalariedEmployee”. The class “Manager” is an employee who have been paid monthly.

c.

Super classes and subclasses of “SalariedEmployee”:

The superclass of the class “SalariedEmployee” is, “Employee”. And subclass of the class “SalariedEmployee” is “Manager”. These classes possess a multilevel inheritance.

d.

Class that override the method “weeklyPay” of “Employee” class:

The class “HourlyEmployee” and “SalariedEmployee” overrides the method “weeklyPay” of the class “Employee”. This is because, the “weeklyPay()” is specific in “HourlyEmployee” and “SalariedEmployee” as it calculates weekly pay for hourly employees and salaried employees separately. So, this method needs to be overridden in these classes.

e.

Class that override the method “setName” of “Employee” class:

None of the subclasses of “Employee” overrides the method “setName()”.

f.

Instance variables of “HourlyEmployee” object:

The instance variables of the class “HourlyEmployee” are, “name” and “hourlyWage”.

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Answer 3

Question

Chapter 9, Problem 1RE

Program Plan Intro

Inheritance:

Inheritance is the concept of inheriting the members and properties of a base class from the derived class.

The main advantages of inheritance are,

Code reusability and fast implementation.

Reduces the size of the program code.

There are five types of inheritance:

Single inheritance

Multiple inheritance

Hierarchical inheritance

Multilevel inheritance

Hybrid inheritance

If a subclass inherits a base class, then the member functions and data members of the super class can be accessed by the derived class.

But the derived class does not inherit the constructors from the base classes; each derived class should contain individual constructors.

Method Overriding:

Overriding is a feature that allows a child class or subclass to specifically implement a method that already provided by one of its parent classes or super classes.

If the method of the subclass has name, parameters and return type as same as the method in the super class, then the method in the subclass is said to override the method in the super-class.

Instance variable:

Instance variables are the class members declare outside of any constructor, method or block.

The instance variables are created when an object of the class is created. And the instance variable destroys when the object is destroyed.

Zero (“0”) is the default value of an instance variable.

The instance variables can be accessed only using the objects of the class.

Expert Solution & Answer

Explanation of Solution

a.

Subclasses of “Employee”:

The subclasses of the class “Employee” are, “HourlyEmployee” and “SalariedEmployee”. The class “HourlyEmployee” represents an employee who have been paid hourly. The class “SalariedEmployee” represents an employee who have been paid monthly.

b.

Superclasses of “Manager”:

The superclass of the class “Manager” is, “SalariedEmployee”. The class “Manager” is an employee who have been paid monthly.

c.

Super classes and subclasses of “SalariedEmployee”:

The superclass of the class “SalariedEmployee” is, “Employee”. And subclass of the class “SalariedEmployee” is “Manager”. These classes possess a multilevel inheritance.

d.

Class that override the method “weeklyPay” of “Employee” class:

The class “HourlyEmployee” and “SalariedEmployee” overrides the method “weeklyPay” of the class “Employee”. This is because, the “weeklyPay()” is specific in “HourlyEmployee” and “SalariedEmployee” as it calculates weekly pay for hourly employees and salaried employees separately. So, this method needs to be overridden in these classes.

e.

Class that override the method “setName” of “Employee” class:

None of the subclasses of “Employee” overrides the method “setName()”.

f.

Instance variables of “HourlyEmployee” object:

The instance variables of the class “HourlyEmployee” are, “name” and “hourlyWage”.

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Answer 4

Question

Chapter 9, Problem 1RE

Program Plan Intro

Inheritance:

Inheritance is the concept of inheriting the members and properties of a base class from the derived class.

The main advantages of inheritance are,

Code reusability and fast implementation.

Reduces the size of the program code.

There are five types of inheritance:

Single inheritance

Multiple inheritance

Hierarchical inheritance

Multilevel inheritance

Hybrid inheritance

If a subclass inherits a base class, then the member functions and data members of the super class can be accessed by the derived class.

But the derived class does not inherit the constructors from the base classes; each derived class should contain individual constructors.

Method Overriding:

Overriding is a feature that allows a child class or subclass to specifically implement a method that already provided by one of its parent classes or super classes.

If the method of the subclass has name, parameters and return type as same as the method in the super class, then the method in the subclass is said to override the method in the super-class.

Instance variable:

Instance variables are the class members declare outside of any constructor, method or block.

The instance variables are created when an object of the class is created. And the instance variable destroys when the object is destroyed.

Zero (“0”) is the default value of an instance variable.

The instance variables can be accessed only using the objects of the class.

Expert Solution & Answer

Explanation of Solution

a.

Subclasses of “Employee”:

The subclasses of the class “Employee” are, “HourlyEmployee” and “SalariedEmployee”. The class “HourlyEmployee” represents an employee who have been paid hourly. The class “SalariedEmployee” represents an employee who have been paid monthly.

b.

Superclasses of “Manager”:

The superclass of the class “Manager” is, “SalariedEmployee”. The class “Manager” is an employee who have been paid monthly.

c.

Super classes and subclasses of “SalariedEmployee”:

The superclass of the class “SalariedEmployee” is, “Employee”. And subclass of the class “SalariedEmployee” is “Manager”. These classes possess a multilevel inheritance.

d.

Class that override the method “weeklyPay” of “Employee” class:

The class “HourlyEmployee” and “SalariedEmployee” overrides the method “weeklyPay” of the class “Employee”. This is because, the “weeklyPay()” is specific in “HourlyEmployee” and “SalariedEmployee” as it calculates weekly pay for hourly employees and salaried employees separately. So, this method needs to be overridden in these classes.

e.

Class that override the method “setName” of “Employee” class:

None of the subclasses of “Employee” overrides the method “setName()”.

f.

Instance variables of “HourlyEmployee” object:

The instance variables of the class “HourlyEmployee” are, “name” and “hourlyWage”.

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Answer 5

Chapter 9, Problem 1RE

Program Plan Intro

Inheritance:

Inheritance is the concept of inheriting the members and properties of a base class from the derived class.

The main advantages of inheritance are,

Code reusability and fast implementation.

Reduces the size of the program code.

There are five types of inheritance:

Single inheritance

Multiple inheritance

Hierarchical inheritance

Multilevel inheritance

Hybrid inheritance

If a subclass inherits a base class, then the member functions and data members of the super class can be accessed by the derived class.

But the derived class does not inherit the constructors from the base classes; each derived class should contain individual constructors.

Method Overriding:

Overriding is a feature that allows a child class or subclass to specifically implement a method that already provided by one of its parent classes or super classes.

If the method of the subclass has name, parameters and return type as same as the method in the super class, then the method in the subclass is said to override the method in the super-class.

Instance variable:

Instance variables are the class members declare outside of any constructor, method or block.

The instance variables are created when an object of the class is created. And the instance variable destroys when the object is destroyed.

Zero (“0”) is the default value of an instance variable.

The instance variables can be accessed only using the objects of the class.

Expert Solution & Answer

Explanation of Solution

a.

Subclasses of “Employee”:

The subclasses of the class “Employee” are, “HourlyEmployee” and “SalariedEmployee”. The class “HourlyEmployee” represents an employee who have been paid hourly. The class “SalariedEmployee” represents an employee who have been paid monthly.

b.

Superclasses of “Manager”:

The superclass of the class “Manager” is, “SalariedEmployee”. The class “Manager” is an employee who have been paid monthly.

c.

Super classes and subclasses of “SalariedEmployee”:

The superclass of the class “SalariedEmployee” is, “Employee”. And subclass of the class “SalariedEmployee” is “Manager”. These classes possess a multilevel inheritance.

d.

Class that override the method “weeklyPay” of “Employee” class:

The class “HourlyEmployee” and “SalariedEmployee” overrides the method “weeklyPay” of the class “Employee”. This is because, the “weeklyPay()” is specific in “HourlyEmployee” and “SalariedEmployee” as it calculates weekly pay for hourly employees and salaried employees separately. So, this method needs to be overridden in these classes.

e.

Class that override the method “setName” of “Employee” class:

None of the subclasses of “Employee” overrides the method “setName()”.

f.

Instance variables of “HourlyEmployee” object:

The instance variables of the class “HourlyEmployee” are, “name” and “hourlyWage”.

Answer 6

Chapter 9, Problem 1RE

Program Plan Intro

Inheritance:

Inheritance is the concept of inheriting the members and properties of a base class from the derived class.

The main advantages of inheritance are,

Code reusability and fast implementation.

Reduces the size of the program code.

There are five types of inheritance:

Single inheritance

Multiple inheritance

Hierarchical inheritance

Multilevel inheritance

Hybrid inheritance

If a subclass inherits a base class, then the member functions and data members of the super class can be accessed by the derived class.

But the derived class does not inherit the constructors from the base classes; each derived class should contain individual constructors.

Method Overriding:

Overriding is a feature that allows a child class or subclass to specifically implement a method that already provided by one of its parent classes or super classes.

If the method of the subclass has name, parameters and return type as same as the method in the super class, then the method in the subclass is said to override the method in the super-class.

Instance variable:

Instance variables are the class members declare outside of any constructor, method or block.

The instance variables are created when an object of the class is created. And the instance variable destroys when the object is destroyed.

Zero (“0”) is the default value of an instance variable.

The instance variables can be accessed only using the objects of the class.

Expert Solution & Answer

Explanation of Solution

a.

Subclasses of “Employee”:

The subclasses of the class “Employee” are, “HourlyEmployee” and “SalariedEmployee”. The class “HourlyEmployee” represents an employee who have been paid hourly. The class “SalariedEmployee” represents an employee who have been paid monthly.

b.

Superclasses of “Manager”:

The superclass of the class “Manager” is, “SalariedEmployee”. The class “Manager” is an employee who have been paid monthly.

c.

Super classes and subclasses of “SalariedEmployee”:

The superclass of the class “SalariedEmployee” is, “Employee”. And subclass of the class “SalariedEmployee” is “Manager”. These classes possess a multilevel inheritance.

d.

Class that override the method “weeklyPay” of “Employee” class:

The class “HourlyEmployee” and “SalariedEmployee” overrides the method “weeklyPay” of the class “Employee”. This is because, the “weeklyPay()” is specific in “HourlyEmployee” and “SalariedEmployee” as it calculates weekly pay for hourly employees and salaried employees separately. So, this method needs to be overridden in these classes.

e.

Class that override the method “setName” of “Employee” class:

None of the subclasses of “Employee” overrides the method “setName()”.

f.

Instance variables of “HourlyEmployee” object:

The instance variables of the class “HourlyEmployee” are, “name” and “hourlyWage”.

Answer 7

Chapter 9, Problem 1RE

Program Plan Intro

Inheritance:

Inheritance is the concept of inheriting the members and properties of a base class from the derived class.

The main advantages of inheritance are,

Code reusability and fast implementation.

Reduces the size of the program code.

There are five types of inheritance:

Single inheritance

Multiple inheritance

Hierarchical inheritance

Multilevel inheritance

Hybrid inheritance

If a subclass inherits a base class, then the member functions and data members of the super class can be accessed by the derived class.

But the derived class does not inherit the constructors from the base classes; each derived class should contain individual constructors.

Method Overriding:

Overriding is a feature that allows a child class or subclass to specifically implement a method that already provided by one of its parent classes or super classes.

If the method of the subclass has name, parameters and return type as same as the method in the super class, then the method in the subclass is said to override the method in the super-class.

Instance variable:

Instance variables are the class members declare outside of any constructor, method or block.

The instance variables are created when an object of the class is created. And the instance variable destroys when the object is destroyed.

Zero (“0”) is the default value of an instance variable.

The instance variables can be accessed only using the objects of the class.

Answer 8

Expert Solution & Answer

Explanation of Solution

a.

Subclasses of “Employee”:

The subclasses of the class “Employee” are, “HourlyEmployee” and “SalariedEmployee”. The class “HourlyEmployee” represents an employee who have been paid hourly. The class “SalariedEmployee” represents an employee who have been paid monthly.

b.

Superclasses of “Manager”:

The superclass of the class “Manager” is, “SalariedEmployee”. The class “Manager” is an employee who have been paid monthly.

c.

Super classes and subclasses of “SalariedEmployee”:

The superclass of the class “SalariedEmployee” is, “Employee”. And subclass of the class “SalariedEmployee” is “Manager”. These classes possess a multilevel inheritance.

d.

Class that override the method “weeklyPay” of “Employee” class:

The class “HourlyEmployee” and “SalariedEmployee” overrides the method “weeklyPay” of the class “Employee”. This is because, the “weeklyPay()” is specific in “HourlyEmployee” and “SalariedEmployee” as it calculates weekly pay for hourly employees and salaried employees separately. So, this method needs to be overridden in these classes.

e.

Class that override the method “setName” of “Employee” class:

None of the subclasses of “Employee” overrides the method “setName()”.

f.

Instance variables of “HourlyEmployee” object:

The instance variables of the class “HourlyEmployee” are, “name” and “hourlyWage”.