In which normalization every non-key attribute must depend on the key and all parts of the key?
Correct answer: C. 3NF
- A. 1NF
- B. 2NF
- C. 3NF
- D. 4NF
Explanation
Third Normal Form (3NF) is a level of database normalization that ensures minimal data redundancy by enforcing a specific dependency between attributes in a table. In 3NF, all non-key attributes (attributes that are not part of the primary key) must be fully dependent on the entire primary key, and not on any subset of the key or other non-key attributes
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Databases cover tables, records, fields, keys and relationships, together with database management systems and relational database design. The subject includes primary and foreign keys, normalization, SQL commands such as SELECT, INSERT, UPDATE and DELETE, queries, forms and reports, while distinguishing a database from a spreadsheet used for simple tabular data.
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