In an E-R, Y is the dominant entity and X is a subordinate entity. Then which of the following is incorrect?Marks : 1Negative Marks : 0Answer hereoperationally, If Y is deleted, so is XX existence is dependent on Yoperationally, If X is deleted, so is Yoperationally, If X is deleted, Y remains the same
Question
In an E-R, Y is the dominant entity and X is a subordinate entity. Then which of the following is incorrect?Marks : 1Negative Marks : 0Answer hereoperationally, If Y is deleted, so is XX existence is dependent on Yoperationally, If X is deleted, so is Yoperationally, If X is deleted, Y remains the same
Solution
The incorrect statement is "operationally, If X is deleted, so is Y".
In an Entity-Relationship (E-R) model, if Y is the dominant entity and X is a subordinate entity, it means that the existence of X is dependent on Y. Therefore, if Y is deleted, X would also be deleted because it relies on Y. However, if X is deleted, Y would not necessarily be deleted because it does not rely on X. Y can exist independently of X. So, the statement "operationally, If X is deleted, so is Y" is incorrect.
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