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Databases · Integrity Constraints and Normal Forms
Official IIT answer key · IIT Kanpur · Audited Aug 2026
GATE CSE 2015 Set 3 Q20 · MCQ · 1 mark
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Topic notes
In GATE, Normal Forms questions test a candidate's ability to identify candidate keys, classify relational schemas into appropriate normal forms (such as 3NF and BCNF), and evaluate decomposition properties (lossless join and dependency preservation). Questions combine normal form verification with decomposition analysis, frequently formatted as multi-select questions (MSQs) requiring rigorous evaluation of all properties across both the original and decomposed relations.
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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+, where F+ is closure of F ?
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