NIC-NIELIT Scientist-B 2020
October 7, 2023Reading-Comprehension
October 7, 2023Database-Management-System
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Question 50
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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).
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Dependency-preservation
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Lossless-join
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BCNF definition
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3NF definition
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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.
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