Data Modeling and its Importance
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Questions and Answers

Which of the following best describes a data model?

  • A model that determines the structure of data
  • A model that specifies the color and size of a car
  • A model that organizes elements of data and standardizes how they relate to each other and to real-world entities (correct)
  • A model that represents the structure of data in programming languages

    • What is the corresponding professional activity to data modeling?

  • Data modeling
  • Data specialist
  • Data scientist
  • Database design (correct)

    • What is the role of a data expert, data specialist, data scientist, data librarian, or data scholar in specifying data models?

  • To implement data models
  • To specify data models (correct)
  • To create data models
  • To analyze data models

    • How are data models often represented?

    <p>In graphical form as diagrams (D)</p> Signup and view all the answers

    What is the relationship between data models and function models?

    <p>Data models complement function models (C)</p> Signup and view all the answers

    Which of the following is NOT a role involved in specifying data models?

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

    What is the purpose of a data model?

    <p>To define the properties of real-world entities (C)</p> Signup and view all the answers

    In the context of programming languages, a data model can be referred to as a...

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

    What is the professional activity that corresponds to data modeling?

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

    What do data models typically specify?

    <p>The structure of data (A)</p> Signup and view all the answers

    Which of the following is NOT a characteristic of a data model?

    <p>Specifies the color and size of a car (D)</p> Signup and view all the answers

    What is the term for the professional activity of specifying data models?

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

    In the context of programming languages, what can a data model be referred to as?

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

    What is the role of a data expert, data specialist, data scientist, data librarian, or data scholar in specifying data models?

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

    What is the purpose of a data model?

    <p>To standardize data relationships (A)</p> Signup and view all the answers

    Which algorithm is used for finding the shortest paths between nodes in a weighted graph?

    <p>Dijkstra's algorithm (A)</p> Signup and view all the answers

    Who conceived Dijkstra's algorithm?

    <p>Edsger W. Dijkstra (A)</p> Signup and view all the answers

    What is the more common variant of Dijkstra's algorithm?

    <p>Finding shortest paths from a single node to all other nodes (A)</p> Signup and view all the answers

    What can Dijkstra's algorithm be used for?

    <p>Finding the shortest paths in a weighted graph (D)</p> Signup and view all the answers

    What does Dijkstra's algorithm find for a given source node in a graph?

    <p>The shortest path to every other node (B)</p> Signup and view all the answers

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