In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.

Solution (By Examveda Team)

Option A: Parent
In a one-to-many relationship, the entity on the one side of the relationship is typically referred to as the "parent" entity. It acts as the primary entity that relates to multiple entities on the "many" side. For example, in a department-employee relationship, the department is the parent entity.

Option B: Child
The "child" entity is on the "many" side of the relationship in a one-to-many relationship. It depends on the parent entity and can have multiple instances associated with a single instance of the parent entity. This does not apply to the entity on the one side.

Option C: Instance
An "instance" refers to a single occurrence of an entity, not the classification of an entity within a relationship. Therefore, it is not relevant to identifying the role of the entity on the one side of the relationship.

Option D: Subtype
A "subtype" is used in an entity-relationship model to represent specialized versions of a general entity (supertype). It is unrelated to the roles in a one-to-many relationship.

Conclusion:
The correct answer is Option A: Parent because the entity on the one side of a one-to-many relationship is referred to as the parent entity.