GATE | GATE CS Mock 2018 | Question 15
Which of the following FD can’t be implied from FD set: {A->B, A->BC, C->D} ?
(A) A->C
(B) B->D
(C) BC->D
(D) All of the above
Answer: (B)
Explanation: A->C can be implied by A->BC and BC->D can be implied by C->D. But we can not get B->D sing given functional dependencies.
Option (B) is correct.
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Last Updated :
03 Jan, 2018
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