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Home Database Data Modeling with ER Model See What Others Are Saying!
  • Question
  • Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier?


  • Options
  • A. Weak entity
  • B. Strong entity
  • C. ID-dependent entity
  • D. ID- independent entity

  • Correct Answer
  • Weak entity 


  • 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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