Quiz 2 - Forms of Inheritance

Inheritance

An object-oriented programming(OOP) mechanism that allows one class (the subclass or child) to acquire the properties and behaviors of another class (the superclass or parent), promoting code reusability and extensibility. It is implemented using the extends keyword for classes and the implements keywordfor interfaces.​

Single Inheritance

• A subclass inherits from one parent class.​

• The simplest and most common, ensuring clarity and avoiding conflicts.​

Example: Dog Class inherits from Animal Class where the Animal Class is the Parent Class while the Dog class is the Child Class

Multiple Inheritance

A subclass inherits from more than one parent class (supported in languages like C++, but not directly in Java).​

• A feature of an object-oriented concept, where a class can inherit properties of more than one parent class.​​

• Java Classes does not support this but we can do it using interfaces.

Can cause ambiguity (e.g., the "diamond problem"),which some languages solve using interfaces or virtual inheritance.​

Example: Flying Car inherits from both Car and Airplane. Where Car and Airplane are Parent Class while Flying Car is the Child Class

Interfaces

How can you do Multiple Inheritance?

Multilevel Inheritance

A chain of inheritance where a class is derived from another derived class.

Allows deeper hierarchies but can make systems harder to maintain if overused.​

Hierarchical Inheritance

Multiple subclasses inherit from the same parent class.​

Useful when multiple classes share common behavior.​

Example: Dog, Cat, and Cow all inherit from Animal Class.

Hybrid Inheritance

A combination of two or more types of inheritance (often involving multiple and hierarchical).​

Powerful but complex, often requiring careful design to avoid confusion.​

Example: A mix of hierarchical and multiple inheritance patterns.​