OO Best Practice

Intro

• Exam focuses on recognizing tight encapsulation, loose coupling and high cohesion.

Coupling

• Coupling is the degree to which one class knows about the other class.
• Ideally a class should know about another class only through what has been exposed through its interface/API.
• If two classes know internal details about each other - they are said to be tightly coupled. This would mean that they cannot be modified independently.