Database Relations and Attributes Quiz
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Questions and Answers

What is the primary key in a relation?

  • Composite key
  • Foreign key
  • Candidate key (correct)
  • Super key

    • Which property ensures that each attribute in a relation has a distinct name?

  • Atomicity (correct)
  • Cardinality
  • Uniqueness
  • Irreducibility

    • What is a foreign key in a relational database?

  • A composite key consisting of multiple attributes
  • An attribute within one relation that matches the candidate key of another relation (correct)
  • A super key with uniqueness and irreducibility properties
  • A key that uniquely identifies a tuple within a relation

    • Which property ensures no duplicate tuples exist in a relation?

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

    What does a super key uniquely identify within a relation?

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

    In a relational schema, what is the operator referred to as?

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

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