Normal Forms Questions And Answers

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Normal Forms Questions & Answers

1. In the __________ normal form, a composite attribute is converted to individual attributes.

Normal Forms Questions & Answers

2. A table on the many side of a one to many or many to many relationship must:

Normal Forms Questions & Answers

3. Tables in second normal form (2NF):

Normal Forms Questions & Answers

4. Which-one ofthe following statements about normal forms is FALSE?

Normal Forms Questions & Answers

5. Functional Dependencies are the types of constraints that are based on______

Normal Forms Questions & Answers

6. Which is a bottom-up approach to database design that design by examining the relationship between attributes:

Normal Forms Questions & Answers

7. Which forms simplifies and ensures that there is minimal data aggregates and repetitive groups:

Normal Forms Questions & Answers

8. Which forms has a relation that possesses data about an individual entity:

Normal Forms Questions & Answers

9. Which forms are based on the concept of functional dependency:

Normal Forms Questions & Answers

10. Empdt1(empcode, name, street, city, state,pincode). For any pincode, there is only one city and state. Also, for given street, city and state, there is just one pincode. In normalization terms, empdt1 is a relation in

Normal Forms Questions and Answers

This is the DBMS questions and answers section on "Normal Forms" with explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand.

1. In the __________ normal form, a composite attribute is converted to individual attributes.

A. First
B. Second
C. Third
D. Fourth

Answer & Explanation

Answer: Option A

Explanation:

First

The first normal form is used to eliminate the duplicate information.

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2. A table on the many side of a one to many or many to many relationship must:

A. Be in Second Normal Form (2NF)
B. Be in Third Normal Form (3NF)
C. Have a single attribute key
D. Have a composite key

Answer & Explanation

Answer: Option D

Explanation:

Have a composite key

The relation in second normal form is also in first normal form and no partial dependencies on any column in primary key.

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3. Tables in second normal form (2NF):

A. Eliminate all hidden dependencies
B. Eliminate the possibility of a insertion anomalies
C. Have a composite key
D. Have all non key fields depend on the whole primary key

Answer & Explanation

Answer: Option A

Explanation:

Eliminate all hidden dependencies

The relation in second normal form is also in first normal form and no partial dependencies on any column in primary key.

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4. Which-one ofthe following statements about normal forms is FALSE?

A. BCNF is stricter than 3 NF
B. Lossless, dependency -preserving decomposition into 3 NF is always possible
C. Loss less, dependency – preserving decomposition into BCNF is always possible
D. Any relation with two attributes is BCNF View Answer

Answer & Explanation

Answer: Option C

Explanation:

Loss less, dependency – preserving decomposition into BCNF is always possible

We say that the decomposition is a lossless decomposition if there is no loss of information by replacing r (R) with two relation schemas r1(R1) andr2(R2).

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5. Functional Dependencies are the types of constraints that are based on______

A. Key
B. Key revisited
C. Superset key
D. None of these

Answer & Explanation

Answer: Option A

Explanation:

Key

Key is the basic element needed for the constraints.

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