In an entity relationship, is the dominant entity and is a subordinate entity. Then which one is incorrect?

Operationally, if is deleted, so is . Explanation: The correct answer (the incorrect statement) is (C) . In database modeling, a dominant entity (often called a Strong Entity or Parent) and a subordinate entity (often called a Weak Entity or Child) share an existence dependency. Existence Dependency: The subordinate entity cannot exist without the dominant entity . If we represent the existence of an entity as a set , then: Deletion Cascade: If the dominant entity is deleted, the subordinate entity loses its parent and must also be deleted (or updated). This is known as a cascade delete:

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WBJECA 2025 — Computer PYQ

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