Which of the following is NOT a basic element of all versions of the E-R model?Marks : 1Negative Marks : 0Answer hereEntitiesAttributesRelationshipsPrimary keys
Question
Which of the following is NOT a basic element of all versions of the E-R model?Marks : 1Negative Marks : 0Answer hereEntitiesAttributesRelationshipsPrimary keys
Solution
The answer is Primary keys. While Entities, Attributes, and Relationships are fundamental elements of all versions of the E-R (Entity-Relationship) model, Primary keys are not. They are part of the relational model, which is a specific type of data model, but not a basic element of all E-R models.
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