Contents
What is aggregation association and composition?
Aggregation is a weak Association. Composition is a strong Association. Aggregation means one object is the owner of another object. Composition means one object is contained in another object. The direction of a relation is a requirement in both Composition and Aggregation.
What is the use of association?
In object-oriented programming, association defines a relationship between classes of objects that allows one object instance to cause another to perform an action on its behalf.
What is the difference between aggregation and Association?
The composition is considered as a strong type of association. In an association relationship, one or more objects can be associated with each other. In an aggregation relationship, objects that are associated with each other can remain in the scope of a system without each other.
Which is the relationship between composition and aggregation?
1 Dependency: Aggregation implies a relationship where the child can exist independently of the parent. 2 Type of Relationship: Aggregation relation is “has-a” and composition is “part-of” relation. 3 Type of association: Composition is a strong Association whereas Aggregation is a weak Association.
How is Association and aggregation used in object oriented programming?
In Object-Oriented programming, an Object communicates to other Object to use functionality and services provided by that object. Composition and Aggregation are the two forms of association.
What’s the difference between aggregation and Association in UML?
Such type of relationship is called UML Aggregation relation. Association relationship is denoted using an arrow. Aggregation relationship is denoted using a straight line with an empty arrowhead at one end. Composition relationship is denoted using a straight line with a filled arrowhead at any one of the ends.