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UGC-NET | UGC NET CS 2014 Dec – II | Question 18

  • Last Updated : 26 Jun, 2018
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What kind of mechanism is to be taken into account for converting a weak entity set into strong entity set in entity-relationship diagram?
(A) Generalization
(B) Aggregation
(C) Specialization
(D) Adding suitable attributes


Answer: (D)

Explanation: Weak entity is an entity which does not have sufficient attributes to form a primary key.
Weak entity is represented by Double rectangle In an ER Diagram.
It must be in a 1:M relation.
A member of a weak entity is called a subordinate entity.
For converting a weak entity set into strong entity set in entity-relationship diagram by simply adding appropriate attributes.
So, option (D) is correct.


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