WHAT IS DIFFERENCE BETWEEN COMPOSITION AND AGGREGATION ?

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Accepted Answer

Composition is a strong relationship where the child object cannot exist independently of the parent object, while aggregation is a weak relationship where the child object can exist independently.

Composition is a 'has-a' relationship, where the child object is a part of the parent object.
Aggregation is a 'has-a' relationship, where the child object is not a part of the parent object.
In composition, the child object is created and destroyed along with the parent object.
In aggregation, the child object can exist independently of the parent object.
Example of composition: A car has an engine. If the car is destroyed, the engine is also destroyed.
Example of aggregation: A university has students. If the university closes, the students can still exist.

WHAT IS DIFFERENCE BETWEEN COMPOSITION AND AGGREGATION ?

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