A directional association between objects. When an object 'has-a' another object, then you have got an aggregation between them. Direction between them specified which object contains the other object. Aggregation is also called a “Has-a” relationship.

Which relationship represents a has a relationship between objects?

In database design, object-oriented programming and design (see object oriented program architecture), has-a (has_a or has a) is a composition relationship where one object (often called the constituted object, or part/constituent/member object) "belongs to" (is part or member of) another object (called the composite ...

What are the relationships between objects?

The relationship between objects defines how these objects will interact or collaborate to perform an operation in an application. The relationship between objects defines how these objects will interact or collaborate to perform an operation in an application.