One Pager Cheat Sheet

• You should be prepared with basic Object-Oriented programming theory when interviewing for a software engineering position.
• Object-Oriented Programming (OOP) is a programming paradigm based on objects, which contain attributes and methods, with four main principles of inheritance, encapsulation, polymorphism, and data abstraction, that provide advantages such as code reuse, flexibility, and improved maintainability.
• Only when an object is created does memory consumption occur, not based on the number of attributes of the class since classes are merely a logical entity.
• In object-oriented programming, polymorphism is the ability of an object or a class to exist in multiple forms, and is realized using two types of binding, static and dynamic.
• All of the listed inheritance types are fundamental features of Object-Oriented Programming.
• Encapsulation, abstraction and method/operator overloading are important features of object-oriented programming that allow the binding of data and logic, hiding data and creating multiple methods with the same name respectively.
• Encapsulation is a key feature of Object-Oriented Programming that supports data-hiding and abstraction by making attributes private and using public setter and getter methods to access and modify them.
• Exception handling using try-catch blocks and finally block allow for the graceful handling of errors and exceptions to take place during the execution of a program.
• Interfaces have public visibility by default, so that any implementation class must adhere to the public exposed methods and attributes when implementing the interface.