An aggregation association is drawn using which symbol?

2014

An aggregation association is drawn using which symbol?

  1. A.

    A line which loops back on to the same table

  2. B.

    A small open diamond at the end of a line connecting two tables

  3. C.

    A small closed diamond at the end of a line connecting two tables

  4. D.

    A small closed triangle at the end of a line connecting two tables

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Correct answer: B

In UML class diagrams, an aggregation association is depicted using an open diamond symbol at the end of a line connecting two classes. This distinguishes it from composition, which uses a filled diamond.

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