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?

Solution (By Examveda Team)

Option A: Weak entity
A weak entity is an entity that cannot exist in the database unless it is associated with a strong entity. However, it typically requires the identifier of the associated strong entity to form its own identifier, making this option incorrect for the given question.

Option B: Strong entity
A strong entity is an entity that can exist independently in the database without relying on any other entity. Since the question specifies dependency on another entity, this option does not fit the criteria.

Option C: ID-dependent entity
An ID-dependent entity requires the identifier of another entity as part of its own identifier. This does not align with the condition in the question where the dependent entity does not require the identifier of the associated entity.

Option D: ID-independent entity
An ID-independent entity cannot exist in the database unless another type of entity exists, but it does not require the identifier of the associated entity to be part of its own identifier. This perfectly matches the criteria described in the question.

Conclusion:
The correct answer is Option D: ID-independent entity because it satisfies the condition of dependency without including the identifier of the related entity in its own identifier.