Question

SUBJECT: SOFTWARE ENGINEERING

2. In regards to UML class diagrams, explain the difference between aggregation, association, and composition.

Answer 1

"A relation between two objects is known as association (rightarrow) Both aggregation and compostion are associations with specific feature In both aggregation and compostion object of one class ""owns"" object of another class, the difference is\r\n In composition () the object of class that is owned by the object of its owning class cannot live on its own it will always live as a part of its owning object.\r\n In Aggregation () the owning object is standalone and can exist even if the object of owning class is dead.\r\n * Aggregation Car rightarrow Tires The tires can be taken of the car and installed on a different one * compostion Body rightarrow Bloodcell When the Body object is destroyed the Bloodcells get destroyed\r\n "