Consider the following Entity Relationship Diagram (ERD) Which of the…

ISRO Scientist/Engineer SC · 2015 · Computer Science· Modified — slightly modified from the official paper; see the solution

Consider the following Entity Relationship Diagram (ERD)

Which of the following possible relations will not hold if the above ERD is mapped into a relation model?

1. A.

   Person (NID, Name)

2. B.

   Qualification (NID, ExamID, QualifiedDate)

3. C.

   Exam (ExamID, NID, ExamName)

4. D.

   Exam (ExamID, ExamName)

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