UGC-NET | UGC NET CS 2015 Jun – II | Question 49

Which of the following statements is FALSE about weak entity set?
(A) Weak entities can be deleted automatically when their strong entity is deleted.
(B) Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity.
(C) A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are included
(D) Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.


Answer: (D)

Explanation:

  • Weak entities can be deleted automatically when their strong entity is deleted. Correct
  • Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity. Correct
  • A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are includedCorrect
  • Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.This is Incorrect, because tuples in a weak entity set are partitioned according to their relationship with tuples in a strong entity set.

So, option (D) is correct.

Quiz of this Question

My Personal Notes arrow_drop_up
Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.