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The __________ of a relationship is 0 if there is no explicit need for the relationship to occur or the relationship is optional.(a) modality(b) cardinality(c) entity(d) structured analysisI had been asked this question in a job interview.My query is from Analysis Modelling in division Design and Implementation of Software Engineering

Answer»

Right ANSWER is (a) modality

Explanation: The modality is 1 if an OCCURRENCE of the RELATIONSHIP is mandatory, else 0 for optional relationship.



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