Question

Which normal form is based on the concept of multivalued dependency?

• A. First Normal Form
• B. Boyce-Codd Normal Form
• C. Fourth Normal Form
• D. Sixth Normal Form

Hint:

3NF \(\rightarrow\) Functional Dependency BCNF \(\rightarrow\) Strong Functional Dependency 4NF \(\rightarrow\) Multivalued Dependency

Answer 1

The Correct Option is C

Concept: Normalization is the process of organizing data to reduce redundancy and anomalies. Different normal forms address different types of dependencies.

Step 1: Understand Multivalued Dependency (MVD).
A multivalued dependency exists when one attribute determines multiple independent values of another attribute. Example: \[ Student \rightarrow\rightarrow Hobby \] \[ Student \rightarrow\rightarrow Language \]

Step 2: Purpose of Fourth Normal Form.
Fourth Normal Form removes undesirable multivalued dependencies. A relation is in 4NF if every non-trivial multivalued dependency is based on a super key.

Step 3: Identify the correct normal form.
Since 4NF specifically deals with multivalued dependencies, \[ \boxed{\text{Fourth Normal Form (4NF)}} \] is the correct answer.