Database Normalization Objective Type Questions with Answers | Database Management System MCQs

Questions

6 Which one is not true ?

A A relation is in BCNF if it is in 4NF

B BCNF is stricter than 3NF

C A relation is in BCNF if ever determinate of the relation is a candidate key

D All are true

Answer: Option [D]

7 If every non-key attribute is functionally dependent on the primary key, then the relation will be in :

A 1NF

B 2NF

C 3NF

D 4NF

Answer: Option [B]

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8 Consider the schema R(S,T,U,V) and the dependencies S→T, T→U, U→V, V→S. Let R= {R1,R2} such that R1∩R2=Φ. Then the decomposition is :

A not in 2NF

B in 2NF but not in 3NF

C in 3NF but not in 2NF

D in both 2NF and 3NF

Answer: Option [B]

9 A table is in 2NF if it is in 1NF and if :

A no column that is not a part of the primary key is dependent on only a portion of the alternate key.

B no column that is not a part of the primary key is dependent on only a portion of the primary key

C no column that is not a part of the primary key is dependent on only a portion of the foreign key

D none of these

Answer: Option [B]

10 A normal form in which every determinant is a key :

A 2NF

B 3NF

C BCNF

D 4NF

Answer: Option [C]