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Home ‣ Database ‣ Data Models into Database Designs Comments
  • Question

  • All primary keys are required.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • Data Models into Database Designs problems

    Search Results

    • 1. A foreign key is used to implement relationships between tables.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. In 1:N relationships, which entity becomes the parent entity is arbitrary.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. For every relationship, there are six possible referential integrity actions.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. The DBMS allows surrogate keys to be changed.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The phrase "SALE.CNumber must exist in CUSTOMER.CNumber" is a referential integrity constraint.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. When the parent entity is required, a new parent row can always be inserted.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. When the parent entity is required, cascading updates and cascading deletions should be allowed or the associated actions on the parent should be prohibited.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. An intersection table is required to represent M:N relationships.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. In a 1:1 relationship, the primary key placement is arbitrary.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. For every relationship, there are six possible sets of minimum cardinalities.

    • Options
    • A. True
    • B. False
      • Discuss

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