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?
A. Weak entity
B. Strong entity
C. ID-dependent entity
D. ID- independent entity
Answer: Option A
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My opinion is that the identifier of the 'other' entity must be a part of the identifier of the weak entity,the identifier of the weak entity must be a composite key(which has the identifier of the weak entity and that of the strong entity. Isn't it true?(Then the given answer become false.)