Database-Management-System

Question 50

Relation R is decomposed using a set of functional dependencies, F, and relation S is decomposed using another set of functional dependencies, G. One decomposition is definitely BCNF, the other is definitely 3NF, but it is not known which is which. To make a quaranteed identification, which one of the following tests should be used on the decompositions? (Assume that the closures of F and G are available).

A	Dependency-preservation
B	Lossless-join
C	BCNF definition
D	3NF definition

Database-Management-SystemNormalizatiGATE 2002

Question 50 Explanation:

If it is BCNF then it is 3NF. But the relation is in 3NF then it is need not to be in BCNF.

Correct Answer: C

Question 50 Explanation:

If it is BCNF then it is 3NF. But the relation is in 3NF then it is need not to be in BCNF.