NIELIT 2021 Dec Scientist B - Section B: 51

Question

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 analysis

Answer 1

option A .Modality.

The modality is 1 if an occurrence of the relationship is mandatory, else 0 for optional relationship.

Answer 2

The answer is Option A. modality

Link for ref.: https://www.tutorialspoint.com/difference-between-cardinality-and-modality