Which statement correctly describes normalization forms?

• A. Normalization uses successive normal forms to organize data.
• B. Normalization eliminates the need for constraints.
• C. Normalization increases data redundancy.
• D. Normalization is only applicable in NoSQL databases.

Answer: (A)

Normalization is a design approach that structures data by applying a sequence of normal forms, each with rules about how attributes depend on keys and other attributes. This progressive, form-by-form process helps separate data into related tables and link them with keys, reducing anomalies and improving data integrity. The statement is best because it captures the essence of normalization: using successive normal forms to organize data into a well-structured, non-redundant design.

The idea that normalization eliminates constraints isn’t correct; in fact, it relies on and enforces constraints to maintain consistency. It also doesn’t increase data redundancy—quite the opposite, it aims to minimize duplication. And normalization isn’t restricted to NoSQL databases; it’s a fundamental concept in relational database design, though some NoSQL systems may employ it in certain contexts.