GENERIC ERD
Observe the GENERIC ER Diagram below:

This ER diagram will be used for the following questions citing Generic ER Diagram.
-If in the GENERIC ERD the Symbol 1 is | and the Symbol2 is 0|,then the number of optional columns in the relational schema resulting from mapping the GENERIC ERD is 0.

Question

GENERIC ERD
Observe the GENERIC ER Diagram below:
 
This ER diagram will be used for the following questions citing Generic ER Diagram.
-If in the GENERIC ERD the Symbol 1 is >| and the Symbol2 is 0|,then the number of optional columns in the relational schema resulting from mapping the GENERIC ERD is 0.

Quizplus · Accepted Answer

In an Entity-Relationship Diagram (ERD), the symbols >| and 0| represent cardinality constraints. The >| symbol typically denotes a "many" side of a relationship where participation is mandatory, while the 0| symbol indicates a "many" side where participation is optional. When mapping to a relational schema, an optional relationship (indicated by 0|) would result in optional columns (allowing NULL values) in the corresponding table to accommodate instances where the relationship does not exist. Therefore, the presence of a 0| symbol implies that there could be optional columns in the resulting relational schema, contradicting the statement that the number of optional columns is 0.

GENERIC ERD Observe the GENERIC ER Diagram Below