BCSE302L - DBMS Module 2 Data Modeling Quiz
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Questions and Answers

What is the main purpose of an Entity Relationship (ER) Model?

  • To manage user interfaces for databases
  • To perform mathematical operations on data
  • To provide a blueprint of a database (correct)
  • To visualize the physical implementation of a database

    • Which type of data model focuses on describing data relationships, semantics, and constraints?

  • Network Model
  • Entity Relationship Model (correct)
  • Relational Data Model
  • Object Oriented Model

    • What does an ER diagram primarily represent?

  • Logical structure of a database (correct)
  • User access permissions
  • Software code implementation
  • Physical storage of data files

    • In the context of database design, what is the purpose of a database schema diagram?

    <p>To visually describe the database structure</p> Signup and view all the answers

    What are the three main components of an ER diagram?

    <p>Entity, Attribute, Relationship</p> Signup and view all the answers

    Which of the following best describes an entity in the context of an ER diagram?

    <p>An object in the real world with a physical existence</p> Signup and view all the answers

    What is the difference between a strong entity and a weak entity in an ER model?

    <p>Strong entities have key attributes, weak entities do not</p> Signup and view all the answers

    What best describes an Entity Type in the context of a database?

    <p>A collection of entities sharing the same attributes</p> Signup and view all the answers

    What is the approach used for mapping M:N relationship types in ER-to-Relational mapping?

    <p>Cross-reference or relationship relation approach</p> Signup and view all the answers

    Which type of attributes are not present in the mapping process according to the text?

    <p>Multivalued attributes</p> Signup and view all the answers

    What is the primary focus of mapping regular entity types in ER-to-Relational mapping?

    <p>Primary Key assignment</p> Signup and view all the answers

    Which approach is NOT mentioned for mapping binary 1:1 relationship types in the provided text?

    <p>No approach mentioned</p> Signup and view all the answers

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