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    Question

    Which of the following is a weak entity in a

    database?
    A An entity with a primary key Correct Answer Incorrect Answer
    B An entity dependent on another entity for identification Correct Answer Incorrect Answer
    C An entity with no attributes Correct Answer Incorrect Answer
    D An entity with only foreign keys Correct Answer Incorrect Answer
    E An entity used for temporary storage Correct Answer Incorrect Answer

    Solution

    Weak entities cannot be uniquely identified without a strong (owner) entity and use a combination of a foreign key and partial key.

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