Question

An aggregation association is drawn using which symbol:

(a) a line which loops back onto the same table

(b) small closed diamond at the end of a line connecting two tables

(c) small open diamond at the end of a line connecting two tables

(d) small triangle at the end of a line connecting the aggregated item and multiple component items

The question was posed to me during an online exam.

I would like to ask this question from Attribute, Tuple and Entity in portion Planning Oracle Applications of Oracle

Answer 1

Right option is (c) small open diamond at the end of a line connecting two tables

Easy explanation: There are three primary inter-object relationships: association, aggregation, and composition. Using the right relationship line is important for placing implicit restrictions on the visibility and propagation of changes to the related classes, matter which play major role in reducing system complexity.