Question

In some ER modeling conventions, _____ entities are called strong and _____ entities are called weak.

Answer 1

In ER modeling conventions, strong entities refer to entities with a primary key, while weak entities are entities without a primary key.

Step-by-step explanation:

In ER modeling conventions, entities with a primary key are called strong entities and entities without a primary key are called weak entities.

A strong entity is an entity that can exist independently of any other entity, while a weak entity is dependent on a strong entity for its existence. For example, in a database of students and their courses, the student entity would be considered a strong entity, as it can exist on its own. On the other hand, the course entity would be a weak entity, as it is dependent on the student entity.