Question

In a class diagram, what does a solid line with a diamond shape between two classes represent?
Association
Inheritance
Aggregation
Composition

Answer 1

4 Composition
In a class diagram, a solid line with a diamond shape between two classes represents a composition relationship. Composition is a strong form of aggregation where the life cycle of the contained class is dependent on the container class. It implies a strong relationship where the contained class is a part of the container class and cannot exist independently.