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Home Database The Relational Model and Normalization See What Others Are Saying!
  • Question
  • Which of the following is not a restriction for a table to be a relation?


  • Options
  • A. The cells of the table must contain a single value.
  • B. All of the entries in any column must be of the same kind.
  • C. The columns must be ordered.
  • D. No two rows in a table may be identical.

  • Correct Answer
  • The columns must be ordered. 


  • More questions

    • 1. For every relationship, how many possible types of actions are there when enforcing minimum cardinalities?

    • Options
    • A. Two
    • B. Three
    • C. Four
    • D. Six
    • Discuss
    • 2. With JSP, the coding is done in Java and only in Java.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. The NOT EXISTS keyword will be true if any row in the subquery meets the condition.

    • Options
    • A. True
    • B. False
    • Discuss
    • 4. Indexes may be created or dropped at any time.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. Another name for multimedia data is unstructured data.

    • Options
    • A. True
    • B. False
    • Discuss
    • 6. Because of the need for extensive knowledge of SQL, many database developers choose to automate the redesign process.

    • Options
    • A. True
    • B. False
    • Discuss
    • 7. The data model produced from the reverse engineering process is a true logical model.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. Oracle will let you define Notepad as your default editor, and whenever you type NOTEPAD, SQL*Plus will invoke Notepad.

    • Options
    • A. True
    • B. False
    • Discuss
    • 9. The left-leaning slash tells Oracle to execute whatever statement is in the buffer.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. Failure to control confidentiality may lead to loss of competitiveness.

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


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