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Questions and Answers
What is the term used to describe reusing a class in another class by extending it?
Which form of class reusability involves placing a reference/object of a class in another class?
What is the term for extending a class with another class?
Which feature allows a child class to provide its specific implementation for a method already defined in the parent class?
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What kind of classes can contain abstract methods that must be implemented by their subclasses?
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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.
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Description
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.
