How many columns will a relation resulting from mapping the Entity X have?

A)2
B)3
C)4

Question

How many columns will a relation resulting from mapping the Entity X have?

A)2 
B)3 
C)4

Quizplus · Accepted Answer

It is not specified how many attributes/properties Entity X has, but the resulting relation would need at least four columns: one for the primary key, and one for each attribute/property being mapped. Additionally, there might be other columns such as foreign keys if there are relationships with other entities. Therefore, the best choice is C, which allows for the possibility of having more than two columns but not as many as five.

How Many Columns Will a Relation Resulting from Mapping the Entity