Databases and Database Management Quiz

What is a relational database?

• A relational database is a type of database that stores and provides access to data points that are related to one another.

• A relational database is a type of database that only stores unconnected data

• A relational database is a type of database that does not allow access to data points

• A relational database is a type of database that is only used for storing images and videos

Explain the concept of primary key in a relational database.

• The highest value in a table

• A unique identifier for each record in a table

• A random number assigned to each record

• The average value of a column

What are the different types of relationships that can exist between tables in a relational database?

• One-to-one, one-to-many, and many-to-many

• Yes, no, maybe

• Red, blue, green

• Up, down, left

How does normalization help in improving the efficiency of a relational database?

• By making data storage more complex

• By increasing data redundancy and inconsistency

• By reducing data redundancy and inconsistency

• By slowing down data retrieval

What is the purpose of a database schema?

• To store data in a database

• To optimize the performance of the database

• To design the user interface of the database

• To define the structure of the database

Explain the difference between logical and physical database structure.

• Logical database structure is how the data is physically stored on the storage devices, while physical database structure is how the data is perceived by the users.

• Logical database structure is related to the hardware components of the database, while physical database structure is related to the software components.

• Logical database structure is how the data is perceived by the users, while physical database structure is how the data is actually stored on the storage devices.

• Logical database structure is only applicable to relational databases, while physical database structure is applicable to all types of databases.

What are the different types of database models used to organize data?

• Blue, Green, Red

• Apple, Banana, Orange

• Hierarchical, Network, Relational

• Circular, Linear, Square

How does indexing improve the performance of a database?

• By slowing down the retrieval of specific rows of data

• By increasing the complexity of the database

• By reducing the storage capacity of the database

• By allowing the database to quickly locate and retrieve specific rows of data.