One Pager Cheat Sheet

• This series introduces you to the concepts of Object-Oriented Programming, which is a fundamental concept in computer science and is frequently asked about in technical interviews, including questions about coding, UML Diagrams, class hierarchy and composition versus association.
• Object-Oriented Programming views reality as made up of objects, each with its own properties and behaviors that can be described using attributes and methods.
• OOP is a programming paradigm based on objects which contain data and code, allowing them to have properties and methods which can be used with instances of the same object.
• An object in Object-Oriented Programming has properties and methods.
• We can define a class using the class keyword, which acts as a blueprint for an object, consisting of properties and methods, as illustrated by a simple Keyboard class example in Java.
• We need to use the Keyboard class to create different kinds of objects by instantiating them with the new keyword.
• To create an instance of a class and assign it to a variable, the syntax variable = new ClassName(); must be used.
• The OOP concept of a class and associated functions are supported in most modern languages such as C++, Python, and Javascript.
• Completing this series will enable you to understand the fundamentals of Object-Oriented Programming and prepare you for OOP questions in technical interviews.