Design Principles Programming is full of rules. When you learn a language, you spend…

Synchronous Message It’s a message where the caller object has to wait for the receiving…

  Interaction models shows the interaction between the components of a system, or between the…

An abstract class is a class that can’t be instantiated; can’t create objects from it.…

Inheritance When we say, “a student IS-A person”, “an employee IS-A person” “a car IS-A…

Whenever you create an object, you need to construct that object, meaning you assign all…

Structural models of software display the organization of a system in terms of the components…

Conceptual Model Once we’ve some use cases or user stories, the next thing we can…

The Concept Of Object-Orientation Object-orientation is what’s referred to as a programming paradigm. It’s not…

This last section is all about examples of real world problems, and what solutions we…