Database Table Normalization by Dr. Hosam Selim
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Questions and Answers

What is the purpose of normalization in database design?

  • To slow down processing speed
  • To decrease data redundancy (correct)
  • To increase data redundancy
  • To complicate table structures
  • In database design, which process evaluates and corrects table structures to minimize data redundancies?

  • Fourth Normal Form (4NF)
  • Denormalization
  • Normalization (correct)
  • First Normal Form (1NF)
  • Which normal form is considered better than First Normal Form (1NF) from a structural point of view?

  • Denormalization
  • Fourth Normal Form (4NF)
  • Third Normal Form (3NF)
  • Second Normal Form (2NF) (correct)
  • What is the potential consequence of denormalization in database design?

    <p>Increased data anomalies</p> Signup and view all the answers

    According to Dr. Hosam Selim, what is the highest normal form needed for most purposes in business database design?

    <p>Third Normal Form (3NF)</p> Signup and view all the answers

    What is the main trade-off for increased performance through denormalization in database design?

    <p>Greater data redundancy</p> Signup and view all the answers

    Which normalization form requires eliminating repeating groups?

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

    What is the purpose of ensuring that no data item is unnecessarily stored in more than one table?

    <p>To minimize data redundancy and update anomalies</p> Signup and view all the answers

    Which attribute dependency concept ensures that all non-prime attributes in a table are dependent on the primary key?

    <p>Functional Dependency</p> Signup and view all the answers

    What is the purpose of normalizing the table structure to reduce data redundancies?

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

    In the context of database normalization, what does 'eliminate the repeating groups' refer to?

    <p>Ensuring each cell has a single value</p> Signup and view all the answers

    Which normal form ensures that all non-prime attributes are fully functionally dependent on the primary key?

    <p>Third Normal Form (3NF)</p> Signup and view all the answers

    What does the relational model view as part of a table or a collection of tables?

    <p>Key values must be identified</p> Signup and view all the answers

    What is the reason for ensuring that no data item is unnecessarily stored in more than one table?

    <p>Minimize data redundancy and update anomalies</p> Signup and view all the answers

    'Each row defines a single entity' is a key principle in which step of the normalization process?

    <p>'Eliminate Repeating Groups'</p> Signup and view all the answers

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