5 Questions
What is the term used to describe reusing a class in another class by extending it?
Inheritance
Which form of class reusability involves placing a reference/object of a class in another class?
Composition
What is the term for extending a class with another class?
Inheritance
Which feature allows a child class to provide its specific implementation for a method already defined in the parent class?
Method overriding
What kind of classes can contain abstract methods that must be implemented by their subclasses?
Abstract classes
Study Notes
- Class reusability is the practice of using a existing class in creating a new class, with two forms: Composition and Inheritance.
- Composition, also known as "has-a" relationship, is achieved by placing a reference or object of one class in another class. Example: Employee and Department classes.
- Inheritance, also known as "is-a" relationship, is achieved by extending one class with another, allowing the new class to inherit all members and characteristics of the parent class. Example: Employee and Person classes.
- Inheritance is a fundamental concept in Object Oriented Programming, enabling the creation of a new class based on an existing one, with the ability to extend or modify its functionality.
- An Abstract class or method is a class or method that cannot be instantiated or called on its own, instead serving as a template for subclasses or methods. Can include abstract methods that must be defined by subclasses.
This quiz covers topics related to Object Oriented Programming (OOP) such as class reusability, inheritance, method overriding, preventing inheritance and method overriding, abstract class/method, abstract classes and methods, composition, and polymorphism.
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