Podcast
Questions and Answers
What is another name for a child class?
What is another name for a child class?
A base class may have at most ________ child class derived from it.
A base class may have at most ________ child class derived from it.
Which is the correct way to tell the compiler that the class being declared (ChildClass) is derived from the base class (BaseClass)?
Which is the correct way to tell the compiler that the class being declared (ChildClass) is derived from the base class (BaseClass)?
Another name for the base class is?
Another name for the base class is?
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If you define a function in the derived class that has the same function signature as a function in the base class, this is known as?
If you define a function in the derived class that has the same function signature as a function in the base class, this is known as?
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If the member variables in a base class are private, then?
If the member variables in a base class are private, then?
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In the derived class definition, you list from the base class?
In the derived class definition, you list from the base class?
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Given a base class with at least one public member function, how many classes can redefine that member function?
Given a base class with at least one public member function, how many classes can redefine that member function?
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If a base class has a public member function, and the derived class has a member function with the same name but with a different parameter list, this function is said to be?
If a base class has a public member function, and the derived class has a member function with the same name but with a different parameter list, this function is said to be?
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Using inheritance allows us to?
Using inheritance allows us to?
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Which of the following are not true?
Which of the following are not true?
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Which of the following are true?
Which of the following are true?
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If the member variables in the base class are listed as protected, then who can access or modify those variables?
If the member variables in the base class are listed as protected, then who can access or modify those variables?
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If a base class has public member functions that are not listed by a derived class, then these functions?
If a base class has public member functions that are not listed by a derived class, then these functions?
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When deriving a class, you should?
When deriving a class, you should?
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If a derived class (Class2) has redefined a function from the base class (Class1), how can that derived function call the base class function?
If a derived class (Class2) has redefined a function from the base class (Class1), how can that derived function call the base class function?
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Study Notes
Inheritance Concepts in Object-Oriented Programming
- A child class is also known as a derived class, descendent class, or sub class.
- A base class can have any number of child classes derived from it.
Syntax for Class Declaration
- The correct syntax for declaring a derived class in C++ is
class ChildClass:public BaseClass.
Base Class Terminology
- Alternate names for a base class include parent class, ancestor class, and super class.
Function Redefinition
- Redefining a function in a derived class that matches the function signature of a base class is referred to as redefinition.
Accessing Private Variables
- If member variables in a base class are private, the derived class can only access them through accessor or modifier functions from the base class.
Redefining Member Functions
- When defining a derived class, only member functions from the base class that need to be redefined should be listed.
Member Function Redefinition Rules
- Any derived class can redefine a public member function from the base class.
Function Overloading
- If a derived class has a function with the same name as a public member function of the base class, but with a different parameter list, it is termed as overloaded.
Benefits of Inheritance
- Inheritance enables the use of polymorphism, eliminates duplicate code, and enhances modularity in classes.
Object Storage and Class Variables
- An object of the base class cannot be stored in a variable of the derived class, while an object of a derived class can be stored in a base class type variable.
Constructor Definitions
- Constructors are not required to be defined in both the base and derived classes; base constructors are not inherited.
Protected Member Variables
- Protected member variables in a base class can be accessed by friends and members of both the base and derived classes.
Member Function Inheritance
- Public member functions from a base class that are not explicitly redefined in a derived class are inherited unchanged.
Redefining Functions on Derivation
- When deriving a class, only list base class functions that will be redefined, instead of overloading all or listing all functions.
Calling Base Class Functions
- A derived class function can call a base class function using the syntax
Class1::print();when the function name and signature are provided.
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Description
This quiz covers key concepts related to inheritance in object-oriented programming, focusing on terminologies such as base and derived classes. It includes syntax for class declaration in C++, accessing private variables, and function redefinition rules. Ideal for students interested in deepening their understanding of C++ inheritance.
