New Enroll here to Join NaBFID Analyst Into Class on May 6

    Question

    Which of the following statements about normalization in

    relational databases is correct?
    A Normalization ensures data redundancy for performance improvement Correct Answer Incorrect Answer
    B The goal of normalization is to create a single flat table with all the data. Correct Answer Incorrect Answer
    C Normalization organizes data into multiple tables to reduce redundancy and ensure integrity Correct Answer Incorrect Answer
    D Denormalized tables are more efficient for transaction processing than normalized ones Correct Answer Incorrect Answer
    E First Normal Form (1NF) ensures that functional dependencies are maintained. Correct Answer Incorrect Answer

    Solution

    Normalization is a systematic approach in relational database design to organize data into multiple related tables. The primary objective is to reduce data redundancy and eliminate undesirable characteristics like update anomalies, insertion anomalies, and deletion anomalies. By splitting a database into smaller, well-structured tables, normalization ensures that each piece of data is stored only once, enhancing data integrity and consistency. The process involves dividing attributes into separate tables based on their functional dependencies, proceeding through normal forms like 1NF, 2NF, 3NF, and BCNF. For example, in a student database, separating the student’s personal details from their course details helps avoid redundancy and maintain accuracy. Why Other Options Are Incorrect :

    1. Normalization ensures data redundancy for performance improvement : Normalization minimizes redundancy, not ensures it.
    2. The goal of normalization is to create a single flat table with all the data : Normalization involves splitting data into multiple related tables, not consolidating into one.
    3. Denormalized tables are more efficient for transaction processing than normalized ones : Normalized tables are generally more efficient for transaction processing because of reduced redundancy. Denormalized tables may be optimized for read-heavy operations in certain contexts.
    4. First Normal Form (1NF) ensures that functional dependencies are maintained : 1NF focuses on eliminating repeating groups and ensuring atomicity, not functional dependencies.

    Practice Next