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An entity set that has a primary key is called as ___________(a) Strong entity set(b) Weak entity set(c) Complete entity set(d) None of the mentionedI had been asked this question in an interview.My enquiry is from Entity Relationship Diagrams topic in chapter Database Design and the ER Model of RDBMS

Answer»

The CORRECT option is (a) STRONG entity set

Easy EXPLANATION: An entity set that has a primary key is called as a strong entity set. An entity set that does not have a primary key is called a WEAK entity set.



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