Hierarchical Models in Bowling
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Questions and Answers

Which of the following best describes data modeling?

  • Creating an abstraction of a more complex real-world object or event
  • Creating a database for various users
  • Creating a specific data model for a determined problem domain (correct)
  • Creating a simple representation of complex real-world data structures

    • What is the importance of data modeling?

  • Facilitates communication
  • Provides an abstraction for the creation of a good database
  • Gives various views of the database
  • All of the above (correct)

    • How can data models be classified?

  • By their level of abstraction (correct)
  • By their size
  • By their implementation language
  • By their complexity

    • Which level of abstraction does the physical model operate at?

    <p>Low</p> Signup and view all the answers

    What is the main focus of the conceptual model?

    <p>Global view of data</p> Signup and view all the answers

    What is the main characteristic of the internal schema?

    <p>Software and hardware dependence</p> Signup and view all the answers

    What is the purpose of the physical model?

    <p>To describe the way data are saved on storage media</p> Signup and view all the answers

    Which model was developed to manage large amounts of data for complex manufacturing projects?

    <p>Hierarchical model</p> Signup and view all the answers

    Which model allows a record to have more than one parent?

    <p>Network model</p> Signup and view all the answers

    Which model uses a graphical representation to model database components?

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

    Which model allows a record to have more than one parent?

    <p>Network Model</p> Signup and view all the answers

    Which model contains data and their relationships in a single structure known as an object?

    <p>Object-Oriented Data model</p> Signup and view all the answers

    Which model promotes structural independence using independent tables?

    <p>Relational Model</p> Signup and view all the answers

    Which model has limited constraint representation and limited relationship representation?

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

    Which model represents a global view of the entire database by the entire organization?

    <p>Conceptual Model</p> Signup and view all the answers

    Which of the following is NOT one of the basic building blocks of a data model?

    <p>Constraint</p> Signup and view all the answers

    What is the purpose of business rules in an organization?

    <p>To create and enforce actions within the organization's environment</p> Signup and view all the answers

    Which of the following is a source for discovering business rules?

    <p>All of the above</p> Signup and view all the answers

    What is the role of naming conventions in data modeling?

    <p>All of the above</p> Signup and view all the answers

    Which model was created to represent complex data relationships effectively?

    <p>Network model</p> Signup and view all the answers

    Which model uses a graphical representation to model database components?

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

    Which model allows a record to have more than one parent?

    <p>Network model</p> Signup and view all the answers

    Which model promotes data sharing and conceptual simplicity with its parent/child relationship?

    <p>Hierarchical model</p> Signup and view all the answers

    Which model contains data and their relationships in a single structure known as an object?

    <p>Object-Oriented Data model</p> Signup and view all the answers

    Which model is an SQL-based relational database application?

    <p>Relational model</p> Signup and view all the answers

    Which model operates at the lowest level of abstraction and describes the way data is saved on storage media?

    <p>Physical model</p> Signup and view all the answers

    What type of independence is achieved when changes in the physical model do not affect the internal model?

    <p>Physical independence</p> Signup and view all the answers

    Which model represents a global view of the entire database by the entire organization?

    <p>Conceptual model</p> Signup and view all the answers

    What is the main focus of the logical model?

    <p>Global view of data</p> Signup and view all the answers

    Which type of data model is an abstraction of a complex real-world data environment?

    <p>Relational model</p> Signup and view all the answers

    What type of independence is achieved when changing the internal model does not affect the conceptual model?

    <p>Logical independence</p> Signup and view all the answers

    Which model allows a record to have more than one parent?

    <p>Network Model</p> Signup and view all the answers

    Which model promotes structural independence using independent tables?

    <p>Relational Model</p> Signup and view all the answers

    Which model uses a graphical representation to model database components?

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

    Which model has limited constraint representation and limited relationship representation?

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

    What is the main focus of the conceptual model?

    <p>High-level description of data objects</p> Signup and view all the answers

    Which level of abstraction does the physical model operate at?

    <p>Low-level</p> Signup and view all the answers

    Which of the following is NOT a basic building block of a data model?

    <p>Constraint</p> Signup and view all the answers

    What is the purpose of business rules in an organization?

    <p>To create and enforce actions within the organization's environment</p> Signup and view all the answers

    Which of the following is NOT a source for discovering business rules?

    <p>Written documentation</p> Signup and view all the answers

    How do nouns translate into data model components?

    <p>Nouns translate into entities</p> Signup and view all the answers

    What is the main purpose of naming conventions in data modeling?

    <p>To promote self-documentation</p> Signup and view all the answers

    Which of the following examples represents a one-to-many relationship?

    <p>Each customer can place one or many orders</p> Signup and view all the answers

    Which one of the following is NOT a reason why data modeling is important?

    <p>Provides an abstraction for the creation of a good database</p> Signup and view all the answers

    What is the purpose of data modeling?

    <p>To represent complex real-world data structures</p> Signup and view all the answers

    Which of the following is NOT a level of abstraction at which data models can be classified?

    <p>Structural</p> Signup and view all the answers

    What is a data model?

    <p>A simple representation of complex real-world data structures</p> Signup and view all the answers

    Which model allows a record to have more than one parent?

    <p>Network model</p> Signup and view all the answers

    What are business rules and how do they influence database design?

    <p>Business rules are rules that govern the operation of a business and they influence the design of a database</p> Signup and view all the answers

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