Which of the following is NOT true about the functional dependency A → (X,Y)?
A)X is functionally dependent on A.
B)A determines Y.
C)X and Y together determine A.
D)X and Y are functionally dependent on A.

Question

Quizplus · Accepted Answer

The functional dependency A → (X,Y) means that X and Y can be uniquely determined by knowing the value of A. Therefore, options A, B, and D are true. Option C is not true because X and Y together do not determine A; rather, A determines both X and Y.

Which of the Following Is NOT True About the Functional