Data Modeling and Information Systems Quiz
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Questions and Answers

Which of the following best describes an information system?

  • A system that analyzes data
  • A system that models data structures
  • A system that captures, stores, manipulates, and retrieves data (correct)
  • A system that organizes data in a database

    • What is a data model?

  • A program that captures and stores data
  • A representation of hardware and software constraints
  • A diagram that illustrates the relationship between data
  • A conceptual representation of the data structures required by a database (correct)

    • What is an entity in a data model?

  • A relationship between tables in a database
  • A class of persons, places, objects, events, or concepts about which data needs to be stored (correct)
  • A descriptive property or characteristic of an entity
  • A unique value for each entity instance

    • What is an attribute in a data model?

    <p>A descriptive property or characteristic of an entity (C)</p> Signup and view all the answers

    What is a key in a data model?

    <p>An attribute, or a group of attributes, that assumes a unique value for each entity instance (A)</p> Signup and view all the answers

    What is an Entity Relationship Diagram (ERD)?

    <p>A schematic representation of the database (B)</p> Signup and view all the answers

    What is a synonym for an entity in a data model?

    <p>Table (D)</p> Signup and view all the answers

    What is a synonym for an attribute in a data model?

    <p>Property (B)</p> Signup and view all the answers

    What is a synonym for a key in a data model?

    <p>Primary key (A)</p> Signup and view all the answers

    What is a Data Element Dictionary (DED)?

    <p>A text representation of the data model (C)</p> Signup and view all the answers

    Which type of data model focuses on establishing entities, characteristics of an entity, and relationships between them?

    <p>Conceptual Data Model (B)</p> Signup and view all the answers

    Which type of data model is used to develop a technical map of rules and data structures for a specific project?

    <p>Logical Data Model (C)</p> Signup and view all the answers

    Which type of data model defines how data is physically stored in a database?

    <p>Physical Data Model (B)</p> Signup and view all the answers

    Which data modeling approach is the most common method used to build data models for relational databases?

    <p>Entity Relationship Modeling (A)</p> Signup and view all the answers

    What is the goal of data modeling?

    <p>To represent data objects accurately (C)</p> Signup and view all the answers

    What type of data model stores data in a single table?

    <p>Simple Data Model (C)</p> Signup and view all the answers

    What is the purpose of normalization in database design?

    <p>To eliminate data anomalies (C)</p> Signup and view all the answers

    Which normal form provides criteria for determining a table's degree of vulnerability to inconsistencies and anomalies?

    <p>First Normal Form (C)</p> Signup and view all the answers

    Which normal form eliminates only partial dependencies, but not transitive dependencies?

    <p>Second Normal Form (A)</p> Signup and view all the answers

    Which normal form eliminates all dependencies on non-key attributes?

    <p>Third Normal Form (D)</p> Signup and view all the answers

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