Question

In packaged data models, strong entities always have _____ between them.

a) Relationships
b) Constraints
c) Dependencies
d) Attributes

Answer 1

In packaged data models, strong entities always have relationships between them, which signify logical connections based on shared attributes.

Step-by-step explanation:

In packaged data models, strong entities always have relationships between them. This refers to the connections that define how entities share information in a database. A strong entity is an entity that can exist independently of other entities, usually defined by a primary key. These entities are linked by relationships, which are logical connections established on common attributes that strong entities share.

For instance, in a university database, a Student entity and a Course entity are both considered strong entities. The relationship between them could be an enrollment, which signifies that a student has registered for a course. This relationship is crucial because it dictates the flow and structure of data within the system.