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EERD Concepts Quiz
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EERD Concepts Quiz

Created by
@SimplerLobster

Questions and Answers

What is the most useful additional data modeling concept of Enhanced ER (EER) model?

  • Specialization/generalization (correct)
  • Aggregation/composition
  • Polymorphism/abstraction
  • Inheritance/encapsulation

    • What is a diagrammatic technique for displaying specialization/generalization in an EER diagram using UML?

  • Use case diagram
  • Activity diagram
  • Class diagram (correct)
  • Sequence diagram

    • What are the two main types of restrictions on relationships used to express the semantics of relationship?

  • Abstraction Constraints, Composition Constraints
  • Cardinality Constraints, Participation Constraints (correct)
  • Polymorphism Constraints, Encapsulation Constraints
  • Inheritance Constraints, Aggregation Constraints

    • What does cardinality ratio specify in a binary relationship?

    <p>The number of relationship instances that an entity can participate in</p> Signup and view all the answers

    What are the possible cardinality ratios in a binary relationship?

    <p>One-to-one (1:1), One-to-many (1:M) or Many-to-one (M:1)</p> Signup and view all the answers

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