Which normal form is considered adequate for usual database design
Correct answer: B. 3NF
- A. 2NF
- B. 3NF
- C. 4NF
- D. 5NF
Explanation
Ensures minimal data redundancy by eliminating the dependency of attributes on non-key attributes. This reduces the risk of data anomalies (insertion, deletion, update) that can occur when data is scattered across multiple tables
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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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