Podcast
Questions and Answers
Which one of the following best defines a Database Management System (DBMS)?
Which one of the following best defines a Database Management System (DBMS)?
- Data about data
- A software used to manage databases (correct)
- An information repository
- A collection of inter-related data
What is the origin of the word 'data'?
What is the origin of the word 'data'?
- From the word 'information'
- From the word 'database'
- From the word 'datum' (correct)
- From the word 'metadata'
Which one of the following best describes metadata?
Which one of the following best describes metadata?
- A collection of inter-related data
- Organized data
- An information repository
- Data about data (correct)
What does a data dictionary contain?
What does a data dictionary contain?
What does DBMS provide in the case of multiple users?
What does DBMS provide in the case of multiple users?
Which one of the following best describes a database management system (DBMS)?
Which one of the following best describes a database management system (DBMS)?
What is the purpose of a data dictionary?
What is the purpose of a data dictionary?
What is the difference between data and information?
What is the difference between data and information?
What does metadata refer to in the context of a database?
What does metadata refer to in the context of a database?
What does a database provide in the case of multiple users?
What does a database provide in the case of multiple users?
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Study Notes
Database Management System (DBMS)
- A DBMS is a software system that allows the definition, creation, maintenance, and manipulation of databases.
Origin of the Word 'Data'
- The word 'data' originates from the Latin word "datum," which means "given."
Metadata
- Metadata is "data about data" that describes the structure, content, and usage of a database.
Data Dictionary
- A data dictionary contains metadata about the database, including definitions of tables, indexes, and relationships.
Multi-User Support
- A DBMS provides concurrency control, data integrity, and security features in the case of multiple users.
Purpose of a Data Dictionary
- The purpose of a data dictionary is to provide a centralized repository of metadata about the database.
Data vs. Information
- Data refers to the raw, unorganized facts, while information is the organized and meaningful data that has been processed and interpreted.
Metadata in a Database
- In a database, metadata refers to the data that describes the structure, content, and usage of the database, such as table definitions, index descriptions, and relationships between tables.
Database and Multiple Users
- A database provides a controlled and organized way to store and manage data, even in the case of multiple users, by enforcing data integrity, security, and concurrency control.
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