Conclusion

Aggregation vs composition is one of the most common questions asked in interviews where the job requires skills in OOP. Whenever you are asked to do an object-oriented design, you must follow the rules of UML diagrams. This makes it easier for others to understand relationships in your code without having to know your notation. UML can save a lot of time during the sketch up of a system. This lesson provides a very basic understanding of some advanced topics of OOP and visualizing the structure of an OOP design.