Nornalizzazione basi di dati relazionali
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9 questions
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- Q1What is normalization in relational database?Randomly arranging data without any specific structure.Storing data in a single table without any relationship.Organizing data to minimize redundancy and dependency.Duplicating data in multiple tables for easier access.30s
- Q2What is a primary key in a relational database?A field that contains multiple values for each record.A table that stores the metadata of the database.A query used to combine data from multiple tables.A unique identifier for each record in a table.30s
- Q3What is the purpose of database normalization?To store data in a single table without any organization.To increase data redundancy and improve performance.To randomly arrange data in a database.To eliminate data redundancy and increase data integrity.30s
- Q4What is the First Normal Form (1NF)?Combining multiple tables into a single table for increased performance.Breaking a single table into multiple tables for better organization.Removing all relationships between tables for easier management.Ensuring atomicity of data by eliminating repeating groups.30s
- Q5What is the purpose of foreign keys in a relational database?To store data in a single table.To combine data from multiple tables.To create duplicate entries in a table.To establish relationships between tables.30s
- Q6What is the Second Normal Form (2NF) in database normalization?Combining multiple tables into a single table for increased performance.Removing all relationships between tables for easier management.Ensuring non-key attributes depend on the entire primary key.Breaking a single table into multiple tables for better organization.30s
- Q7What is the Third Normal Form (3NF) in database normalization?Removing all relationships between tables for easier management.Ensuring non-key attributes do not depend on other non-key attributes.Breaking a single table into multiple tables for better organization.Combining multiple tables into a single table for increased performance.30s
- Q8What is a composite key in a relational database?A key that consists of two or more columns.A single column used as a primary key.A unique identifier for each record in a table.A foreign key referencing another table.30s
- Q9What is the purpose of referential integrity in a relational database?To randomly arrange data in a database for increased performance.To store data in a single table without any organization.To maintain consistency and relationships between related tables.To eliminate data redundancy and increase data integrity.30s