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ISRO | ISRO CS 2018 | Question 15

Last Updated : 10 Jul, 2018

In E-R model, Y is the dominant entity and X is subordinate entity

(A) If X is deleted, then Y is also deleted
(B) If Y is deleted, then X is also deleted
(C) If Y is deleted, then X is not deleted
(D) None of the above

Answer: (B)

Explanation: If any changes occur in dominant entity then they are also reflected in subordinate entity but not the vice versa.
So, option (B) is correct.

Quiz of this Question