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GATE 2015 [Set-2]
April 3, 2025GATE 2015 [Set-2]
April 4, 2025GATE 2015 [Set-3]
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Question 12
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Consider the relation X(P, Q, R, S, T, U) with the following set of functional dependencies
F = {
{P, R} → {S,T},
{P, S, U} → {Q, R}
}
Which of the following is the trivial functional dependency in F+ is closure of F?
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{P,R}→{S,T}
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{P,R}→{R,T}
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{P,S}→{S}
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{P,S,U}→{Q}
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Question 12 Explanation:
X→Y is trivial if Y⊆ X
Correct Answer: C
Question 12 Explanation:
X→Y is trivial if Y⊆ X