UGC NET CS 2018 July - II Question 67

67. A many-to-one relationship exists between entity sets r1 and r2. How will it be represented
using functional depedencies if Pk(r) denotes the primary key attribute of relation r ?

(1) Pk(r1) → Pk(r2)
(2) Pk(r2) → Pk(r1)
(3) Pk(r2) → Pk(r1) and Pk(r1) → Pk(r2)
(4) Pk(r2) → Pk(r1) or Pk(r1) → Pk(r2)

Answer: 1

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UGC NET CS 2018 July - II Question 66	UGC NET CS 2018 July - II Question 68