What is the purpose of the diamond-shaped notation in an association line between classes?a.To specify a multiplicity constraintb.To represent a bidirectional associationc.To denote a dependency between classesd.To indicate a composition relationship
Question
What is the purpose of the diamond-shaped notation in an association line between classes?a.To specify a multiplicity constraintb.To represent a bidirectional associationc.To denote a dependency between classesd.To indicate a composition relationship
Solution
The diamond-shaped notation in an association line between classes is used to indicate a composition relationship. This means that one class is composed of one or more instances of another class. In other words, if the composed object is destroyed, so are the composing objects. This is a strong form of aggregation, and it implies ownership.
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