Question

Which of the following is NOT a basic element of all versions of the E-R model?
A.Entities
B.Attributes
C.Relationships
D.Primary keys

Answer 1

______✨ HEY MATE ✨______

➡️Option (D) Primary keys is the right answer ✔️

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Answer 2

Answer:

Explanation:

E-R Model:

An entity-relationship model (or ER model) describes how several topics of interest relate to one another in a particular field of knowledge. Entity types (which categorize the objects of interest) and relationships between entities are the core building blocks of an ER model (instances of those entity types).

Entity, attribute, and relationship are the three fundamental components of an ER diagram. Additional elements are based on the primary elements. They are the following: recursive relationship, multivalued attribute, derived attribute, weak relationship, and weak entity.

Primary keys is not a basic element of all versions of the E-R model.

Hence, option (d) is the correct answer.

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