DBMS-Enhanced Entity-Relationship (EER) Model Questions and Answers
The DBMS Enhanced Entity-Relationship (EER) Model questions with answers help students understand advanced database modeling techniques like specialization, generalization, and aggregation. These database programming questions and answers are important for placements and competitive exams where data modeling and schema design play a key role. Practicing EER model MCQs improves your conceptual understanding and helps you perform better in DBMS interviews and tests by TCS, IBM, and Infosys. Learn the extended concepts of ER modeling with clear explanations and real-world examples.
DBMS-Enhanced Entity-Relationship (EER) Model
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57 questions
1. Subclasses are the sub-grouping of occurrences of entities in an entity type that shares common attributes or relationships distinct from other sub-groupings.
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2. In case of supertype, objects in one set are grouped or subdivided into one or more classes n many systems.
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3. Superclass is a generic entity type that has a relationship with one or more subtypes.
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5. The relationship between a supeclass and a subclasses is a one-to-many (1 . N) relationship.
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6. The U-shaped symbols in ERR model indicates that the supertype is a subset of the subtype.
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7. Attribute inheritance is the property by which supertype entities inherit values of all attributes of the subtype.
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8. Specialisation is the process of identifying subsets of an entity set of the superclass or supertype that share some distinguishing characterstic.
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9. Specialisation minimizes the difference between member of an entity by identifying the distinguishing and unique characterstics of each member
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10. Generalization is the process of identifying some common characterstics of a collection of entity sets and creating a new entity set that contains entities processing these common characterstics.
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