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Questions and Answers
What is the main characteristic of file-based data management?
What is the main characteristic of file-based data management?
- Data is stored in separate files without explicit relationships (correct)
- All organization's data is stored in one central database
- Data is managed by a database using a DBMS software
- Isolated departmental files are stored in one central database
What is the main advantage of the database approach to data management?
What is the main advantage of the database approach to data management?
- Improved data security
- Avoiding data redundancy
- Data independence for each user or department
- Data sharing among different users (correct)
What does DBMS stand for?
What does DBMS stand for?
- Data-Based Management System
- Database Management Software
- Data Business Management Service
- Database Management System (correct)
What is the purpose of a relational database management system (RDMS)?
What is the purpose of a relational database management system (RDMS)?
In file-based data management, how is data stored?
In file-based data management, how is data stored?
What is the main disadvantage of file-based data management compared to the database approach?
What is the main disadvantage of file-based data management compared to the database approach?
What is the purpose of tables in a database?
What is the purpose of tables in a database?
What does 'degree' refer to in the context of a database table?
What does 'degree' refer to in the context of a database table?
Which term is used to represent a single piece of information or data value stored within a record or row in a database?
Which term is used to represent a single piece of information or data value stored within a record or row in a database?
What do data types determine in a database?
What do data types determine in a database?
Which data type is used to represent whole numbers that can have positive, negative, or zero values?
Which data type is used to represent whole numbers that can have positive, negative, or zero values?
What is the purpose of varchar data type in a database?
What is the purpose of varchar data type in a database?
What does each character occupy in terms of space in a computer?
What does each character occupy in terms of space in a computer?
Which type of number contains decimals and fractions in a database?
Which type of number contains decimals and fractions in a database?
What does 'array' contain in a database?
What does 'array' contain in a database?
What is the main purpose of 'string' data type in a database?
What is the main purpose of 'string' data type in a database?
What is the purpose of a database table?
What is the purpose of a database table?
What does the term 'degree' refer to in the context of a database table?
What does the term 'degree' refer to in the context of a database table?
What do data types determine in a database?
What do data types determine in a database?
What is the main characteristic of file-based data management?
What is the main characteristic of file-based data management?
What does the term 'array' contain in a database?
What does the term 'array' contain in a database?
What is the main advantage of using a database approach to data management?
What is the main advantage of using a database approach to data management?
What is the purpose of a database management system (DBMS)?
What is the purpose of a database management system (DBMS)?
What does the term 'data independence' refer to in the context of a database approach?
What does the term 'data independence' refer to in the context of a database approach?
What is the main disadvantage of file-based data management compared to the database approach?
What is the main disadvantage of file-based data management compared to the database approach?
What is the main characteristic of a relational Data Base Management System (RDMS)?
What is the main characteristic of a relational Data Base Management System (RDMS)?
Study Notes
File-Based Data Management
- Main characteristic: Data is stored in separate files, making it difficult to manage and retrieve.
Database Approach
- Main advantage: Allows for efficient data management, retrieval, and sharing.
- DBMS stands for Database Management System.
- DBMS is responsible for creating, modifying, and querying databases.
Relational Database Management System (RDMS)
- Purpose: To manage and provide access to data in a relational database.
Data Storage
- In file-based data management, data is stored in separate files.
- In a database, data is stored in tables.
Disadvantages of File-Based Data Management
- Main disadvantage: Difficult to manage and retrieve data due to data redundancy and inconsistency.
Tables in a Database
- Purpose: To organize and store data in a structured format.
- A table consists of rows (records) and columns (fields).
Database Terminology
- Degree: Refers to the number of columns in a table.
- Field or column: Represents a single piece of information or data value stored within a record or row.
- Data types: Determine the type of data that can be stored in a field, such as numeric, character, or date.
Data Types
- Determines the type of data that can be stored in a field.
- Examples of data types:
- Integer: Whole numbers that can have positive, negative, or zero values.
- Varchar: Characters of varying length, each occupying one byte of space in a computer.
- Real numbers: Contain decimals and fractions.
- Array: A collection of values of the same type.
- String: A sequence of characters, used to represent text data.
- Purpose: To ensure data consistency and prevent errors.
Database Management System (DBMS)
- Purpose: To create, modify, and query databases.
- DBMS provides data independence, allowing changes to the physical structure of the database without affecting the application.
Relational Data Base Management System (RDMS)
- Main characteristic: Data is organized into tables with relationships between them.
- RDMS provides a flexible and scalable way to manage large amounts of data.
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Description
Test your knowledge of file-based data management, database approach to data management, database management systems, and the advantages of database management.
