Consider the following relationship involving two entities, students and classes: a student can take many classes. a class can be taken by many students.

how many tables can be used to represent this relationship in a schema?

a. 1

b. 2

c. 3.

d all of them

3

Explanation:

ER model can be used and is based on three basic concepts: Entities, Attributes & Relationships.

An entity can be place, person, object, event or a concept, which stores data in the database.

Relationship is nothing but an association among two or more entities. A weak entity is a type of entity which doesn't have its key attribute.