An entity whose identifier includes the identifier of another entity is a(n)________.
A)strong entity
B)weak entity
C)optional entity
D)required entity

Question

Quizplus · Accepted Answer

An entity whose identifier includes the identifier of another entity is called a weak entity. Weak entities are dependent on other entities and cannot exist without them. They have a partial key that is used in combination with the key of the related entity to create a unique identifier for the weak entity. Strong entities have their own unique identifier and do not rely on other entities for identification. Optional and required entities do not refer to this concept of entity identification.

An Entity Whose Identifier Includes the Identifier of Another Entity