Database Management and SQL

Description: This quiz will test your knowledge on Database Management and SQL.
Number of Questions: 15
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What is the primary purpose of a database management system (DBMS)?

  1. To store and manage data

  2. To process data

  3. To retrieve data

  4. To update data


Correct Option: A
Explanation:

A DBMS is a software system that allows users to create, manage, and access data in a database.

Which of the following is a type of database model?

  1. Relational

  2. Hierarchical

  3. Network

  4. Object-oriented


Correct Option: A
Explanation:

A relational database model is a type of database model that represents data in the form of tables, where each table consists of rows and columns.

What is the purpose of a primary key in a database table?

  1. To uniquely identify each row in the table

  2. To store the most important data in the table

  3. To create a relationship between two tables

  4. To index the data in the table


Correct Option: A
Explanation:

A primary key is a column or set of columns in a database table that uniquely identifies each row in the table.

What is the purpose of a foreign key in a database table?

  1. To uniquely identify each row in the table

  2. To store the most important data in the table

  3. To create a relationship between two tables

  4. To index the data in the table


Correct Option: C
Explanation:

A foreign key is a column or set of columns in a database table that references a primary key in another table.

What is the purpose of an index in a database table?

  1. To uniquely identify each row in the table

  2. To store the most important data in the table

  3. To create a relationship between two tables

  4. To speed up data retrieval


Correct Option: D
Explanation:

An index is a data structure that is used to speed up data retrieval in a database table.

What is the purpose of a view in a database?

  1. To store data

  2. To process data

  3. To retrieve data

  4. To update data


Correct Option: C
Explanation:

A view is a virtual table that is defined by a query. Views are used to retrieve data from a database.

What is the purpose of a trigger in a database?

  1. To store data

  2. To process data

  3. To retrieve data

  4. To update data


Correct Option: D
Explanation:

A trigger is a stored procedure that is automatically executed when a specific event occurs in a database.

What is the purpose of a stored procedure in a database?

  1. To store data

  2. To process data

  3. To retrieve data

  4. To update data


Correct Option: B
Explanation:

A stored procedure is a set of SQL statements that are stored in the database and can be executed as a single unit.

What is the purpose of a transaction in a database?

  1. To store data

  2. To process data

  3. To retrieve data

  4. To update data


Correct Option: D
Explanation:

A transaction is a set of operations that are executed as a single unit. Transactions are used to ensure that data is updated consistently.

What is the purpose of a lock in a database?

  1. To prevent other users from accessing data

  2. To prevent other users from updating data

  3. To prevent other users from deleting data

  4. All of the above


Correct Option: D
Explanation:

A lock is a mechanism that prevents other users from accessing, updating, or deleting data.

What is the purpose of a backup in a database?

  1. To protect data from loss

  2. To restore data in case of a failure

  3. To improve performance

  4. All of the above


Correct Option: D
Explanation:

A backup is a copy of data that is stored in a separate location. Backups are used to protect data from loss, to restore data in case of a failure, and to improve performance.

What is the purpose of a recovery plan in a database?

  1. To restore data in case of a failure

  2. To minimize downtime in case of a failure

  3. To protect data from loss

  4. All of the above


Correct Option: D
Explanation:

A recovery plan is a set of procedures that are used to restore data in case of a failure, to minimize downtime in case of a failure, and to protect data from loss.

What is the purpose of a disaster recovery plan in a database?

  1. To restore data in case of a disaster

  2. To minimize downtime in case of a disaster

  3. To protect data from loss

  4. All of the above


Correct Option: D
Explanation:

A disaster recovery plan is a set of procedures that are used to restore data in case of a disaster, to minimize downtime in case of a disaster, and to protect data from loss.

What is the purpose of a database administrator (DBA)?

  1. To manage the database

  2. To design the database

  3. To implement the database

  4. All of the above


Correct Option: D
Explanation:

A DBA is responsible for managing, designing, and implementing a database.

What is the purpose of a database designer?

  1. To design the database

  2. To implement the database

  3. To manage the database

  4. All of the above


Correct Option: A
Explanation:

A database designer is responsible for designing the database.

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