DBMS Normalization Quiz

What is a functional dependency in a grocery store?

• A functional dependency in a grocery store is a relationship between two products such that the availability of one product determines the availability of another product.

• A functional dependency in a grocery store is a type of pricing strategy.

• A functional dependency is a relationship between three aisles in a grocery store.

• A functional dependency is a way to organize products in a supermarket.

Explain the concept of normalization forms in DBMS using a real-world scenario.

• Normalization forms in DBMS are used to increase redundancy and dependency in a database.

• Normalization forms in DBMS include 5NF, 6NF, and 7NF.

• Normalization forms in DBMS are not relevant for data integrity.

• Normalization forms in DBMS are rules that guide the structuring of data in a database to reduce redundancy and dependency, ensuring data integrity and minimizing anomalies. The different normalization forms include 1NF, 2NF, 3NF, BCNF, and 4NF.

Describe the normalization process in database management.

• Normalization is the process of adding duplicate data to a database.

• Normalization in database management is the process of organizing data in a database efficiently. It involves dividing a database into multiple tables and defining relationships between them to reduce redundancy and improve data integrity.

• Normalization does not impact data integrity in a database.

• Normalization involves combining all data into a single table in a database.

What is partial dependency and how does it relate to normalization?

• Normalization increases partial dependency in databases.

• Partial dependency is when all attributes depend on the entire candidate key.

• Partial dependency is a situation in database normalization where non-prime attributes depend on only part of a candidate key. It is related to normalization as the process of normalization helps in identifying and eliminating partial dependencies to reduce data redundancy.

• Partial dependency is only applicable in denormalized databases.

Discuss the benefits of normalization in database design.

• Normalization in database design decreases data integrity

• Normalization in database design increases data redundancy

• Normalization in database design limits flexibility and scalability

• Normalization in database design reduces data redundancy, improves data integrity, and enhances flexibility and scalability.

What are some common normalization techniques used in DBMS?

• Fifth Normal Form (5NF)

• First Normal Form (1NF), Second Normal Form (2NF), Third Normal Form (3NF), Boyce-Codd Normal Form (BCNF), Fourth Normal Form (4NF)

• Partial Normal Form (PNF)

• Super Normal Form (SNF)

What is Boyce-Codd Normal Form (BCNF) and when is it used?

• BCNF is used when the table has no partial dependencies

• BCNF is used when every determinant in a table is a candidate key.

• BCNF is used when the table is in 1st Normal Form

• BCNF is used when there are no repeating groups of attributes

Explain the concepts of 1NF, 2NF, 3NF, 4NF, and 5NF in normalization.

• Explanation of 6NF, 7NF, 8NF, 9NF, and 10NF

• Normalization of 1SF, 2SF, 3SF, 4SF, and 5SF

• Definition of 1NF, 2NF, 3NF, 4NF, and 5NF

• Explanation of 1NF, 2NF, 3NF, 4NF, and 5NF in normalization.

How does normalization help in reducing data redundancy and improving data integrity?

• Normalization has no impact on data redundancy or integrity.

• Normalization reduces redundancy by organizing data into multiple related tables and improves integrity by enforcing relationships through foreign keys.

• Normalization increases redundancy by duplicating data in multiple tables.

• Normalization decreases data integrity by removing relationships between tables.

What are the key differences between 3NF and BCNF in database normalization?

• BCNF guarantees transitive dependencies, 3NF does not

• 3NF always results in lossless-join decomposition, BCNF does not

• 3NF allows partial dependencies, BCNF does not

• The key difference is that BCNF ensures every determinant is a candidate key, while 3NF does not guarantee this.