Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) DBMS Integrity Constraints and Normal Form Functional Dependency
Consider a relational schema S = (U, V, W, X, Y, Z) on which the following functional dependencies hold:
{U → V, VW → X, Y → W, X → U}
Which are the candidate keys among following options?
1
UY, VY
2
UY, VY, XY
3
UYZ, VYZ, VWZ
4
UYZ, VYZ, XYZ