What are the most important relationships in a UML class diagram? What are the different types of association relationships? What is a dependency relationship in UML? What is the difference between Generalization & Realization? Which UML Class relationships are tightly coupled? Which UML Class relationships are loosely coupled? What is a Binary Association? What is the difference between a bidirectional and a unidirectional association? What is a Self Association? What is an N-ary Association? What is Aggregation? What is Composition? What is the difference between Composition and Association? What is a Dependency UML Relationship? What is a Generalization UML Relationship? What is Subtyping Polymorphism? What is a UML Realization Relationship?