Databases · Integrity Constraints and Normal Forms
Official IIT answer key · IISc Bangalore · Audited Aug 2026
GATE CSE 2024 Set 2 Q56 · NAT · 2 marks
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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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A functional dependency F: X Y is termed as a useful functional dependency if and only if it satisfies all the following three conditions: - X is not the empty set. - Y is not the empty set. - Intersection of X and Y is the empty set. For a relation R with 4 attributes, the total number of possible useful functional dependencies is …
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