Question

which multiplicity indicator is used to denote the optional association? ​

Answer 1

which multiplicity indicator is used to denote the optional association?

Explanation:

Multiplicity is a definition of cardinality - i.e. number of elements - of some collection of elements by providing an comprehensive interval of non-negative integers to specify the allowable number of instances of described element. Multiplicity interval has some lower bound and (possibly infinite) upper bound:

multiplicity-range ::= [ lower-bound '..' ] upper-bound

lower-bound ::= natural-value-specification

upper-bound ::= natural-value-specification | '*'

Lower and upper bounds could be natural constants or constant expressions evaluated to natural (non negative) number. Upper bound could be also specified as asterisk '*' which denotes unlimited number of elements. Upper bound should be greater than or equal to the lower bound.

Answer 2

Association end multiplicity indicator is used to denote the optional association.

Explanation:

• Association is basically used to display the connection between two modules. Association end is the multiplicity indicator which is used to identify the entity type at the end of the association.
• Every association should have two association ends. The multiplicity of the association end might be 0 or 1 or can be many.
• Association has been widely used in the class diagrams and UML structure diagrams to show the relation or connection between two nodes or objects.

Learn more about Association

An aggregation is a stronger form of association relationship and is represented with a solid diamond at the aggregate end.

A.TRUE

B.FALSE

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