Dataset Structure & Analysis Quiz
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Dataset Structure & Analysis Quiz

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@GracefulMossAgate

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Questions and Answers

In the second example, how did they ensure that StudentAdvisor is fully functionally dependent on StudentID?

  • By removing the StudentMajor attribute (correct)
  • By removing the StudentName attribute
  • By removing the Dr. Smith value
  • By removing the StudentID attribute

    • In the table with the primary key as (StudentID, CourseID), which attribute is a partial dependency?

  • DepartmentID
  • ProfessorID
  • Grade (correct)
  • Salary

    • In the table with the candidate key as (CourseID, Semester), which attribute is a transitive dependency?

  • MajorName (correct)
  • RoomNumber
  • Building
  • InstructorName

    • Which of the following best describes normalization in the database design process?

    <p>Evaluating and correcting table structures to minimize data redundancies</p> Signup and view all the answers

    Which normal form assigns attributes to tables based on determination?

    <p>Second normal form (2NF)</p> Signup and view all the answers

    What is the purpose of denormalization?

    <p>To generate information efficiently</p> Signup and view all the answers

    Which of the following statements about normal forms is true?

    <p>Higher normal forms are better than lower normal forms</p> Signup and view all the answers

    Which attribute represents the number of hours an employee worked on a specific project?

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

    What is the purpose of normalization in database design?

    <p>To eliminate data redundancies</p> Signup and view all the answers

    What is a surrogate key?

    <p>A numeric value that is incremented for each new row</p> Signup and view all the answers

    What should be done before creating table structures in database design?

    <p>Meet the required normal form</p> Signup and view all the answers

    Which normal form requires that there are no transitive dependencies?

    <p>Third normal form (3NF)</p> Signup and view all the answers

    What is the correct definition of functional dependence?

    <p>Attribute A determines attribute B if each value of A determines one and only one value of B</p> Signup and view all the answers

    What is the main purpose of converting a dataset to First Normal Form (1NF)?

    <p>To eliminate multi-valued attributes</p> Signup and view all the answers

    What is the correct term for a group of multiple entries of the same type that can exist for any single key attribute occurrence?

    <p>Repeating group</p> Signup and view all the answers

    Which of the following best describes the purpose of normalization in database design?

    <p>To improve the existing data structure and create an appropriate database design</p> Signup and view all the answers

    What does it mean for a table to be in 3NF?

    <p>No data item will be unnecessarily stored in more than one table</p> Signup and view all the answers

    How does the normalization process work?

    <p>It works one relation at a time and identifies the dependencies of a relation</p> Signup and view all the answers

    Which of the following best describes functional dependence in a table?

    <p>The relationship between attributes in a table</p> Signup and view all the answers

    Which of the following is a recommended naming convention for entity names in data modeling?

    <p>They should be unique within the model</p> Signup and view all the answers

    What should attribute names in data modeling be descriptive of?

    <p>The characteristic</p> Signup and view all the answers

    What should relationship names in data modeling be?

    <p>Active or passive verbs that indicate the nature of the relationship</p> Signup and view all the answers

    What should each entity represent in data modeling?

    <p>A single subject</p> Signup and view all the answers

    What should be clearly defined for each entity instance in data modeling?

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

    What should all entities be in data modeling?

    <p>3NF</p> Signup and view all the answers

    Which normal form describes a tabular format in which all key attributes are defined, there are no multi-valued attributes, and all attributes are dependent on the primary key?

    <p>First Normal Form (1NF)</p> Signup and view all the answers

    When does the conversion to Second Normal Form (2NF) occur?

    <p>Only when the First Normal Form (1NF) has a composite primary key</p> Signup and view all the answers

    In order to achieve Second Normal Form (2NF), what should be done to tables with partial dependencies?

    <p>Make new tables to eliminate partial dependencies</p> Signup and view all the answers

    What is the purpose of creating a separate table for the 'Publishers' in the Third Normal Form (3NF) conversion?

    <p>To eliminate transitive dependencies</p> Signup and view all the answers

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