Database Management Chapter 3 Quiz
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Questions and Answers

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?

  • Improved data security
  • Avoiding data redundancy
  • Data independence for each user or department
  • Data sharing among different users (correct)

    • 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)?

    <p>To design data in tabular form</p> Signup and view all the answers

    In file-based data management, how is data stored?

    <p>In separate files without explicit relationships</p> Signup and view all the answers

    What is the main disadvantage of file-based data management compared to the database approach?

    <p>Inability to avoid data redundancy</p> Signup and view all the answers

    What is the purpose of tables in a database?

    <p>To store unique records and organize data into rows and columns</p> Signup and view all the answers

    What does 'degree' refer to in the context of a database table?

    <p>The number of columns in the table</p> Signup and view all the answers

    Which term is used to represent a single piece of information or data value stored within a record or row in a database?

    <p>Field</p> Signup and view all the answers

    What do data types determine in a database?

    <p>The format of data storage that can hold distinct types or ranges of values</p> Signup and view all the answers

    Which data type is used to represent whole numbers that can have positive, negative, or zero values?

    <p>Integer</p> Signup and view all the answers

    What is the purpose of varchar data type in a database?

    <p>To represent text with variable length</p> Signup and view all the answers

    What does each character occupy in terms of space in a computer?

    <p>1 byte</p> Signup and view all the answers

    Which type of number contains decimals and fractions in a database?

    <p>Floating Point Number</p> Signup and view all the answers

    What does 'array' contain in a database?

    <p>'Array' contains group of elements which can be of same data type</p> Signup and view all the answers

    What is the main purpose of 'string' data type in a database?

    <p>To represent text</p> Signup and view all the answers

    What is the purpose of a database table?

    <p>To organize data into rows and columns</p> Signup and view all the answers

    What does the term 'degree' refer to in the context of a database table?

    <p>The number of columns in the table</p> Signup and view all the answers

    What do data types determine in a database?

    <p>The range of values that can be held by the variables</p> Signup and view all the answers

    What is the main characteristic of file-based data management?

    <p>Storing data directly into variables</p> Signup and view all the answers

    What does the term 'array' contain in a database?

    <p>A collection of values of the same type</p> Signup and view all the answers

    What is the main advantage of using a database approach to data management?

    <p>Avoiding data redundancy and isolating departmental files</p> Signup and view all the answers

    What is the purpose of a database management system (DBMS)?

    <p>To enable users to access the database and manipulate data</p> Signup and view all the answers

    What does the term 'data independence' refer to in the context of a database approach?

    <p>Supporting all users of the organization without the need for isolated data management</p> Signup and view all the answers

    What is the main disadvantage of file-based data management compared to the database approach?

    <p>Each user or department managing its own isolated data</p> Signup and view all the answers

    What is the main characteristic of a relational Data Base Management System (RDMS)?

    <p>Storing data in tabular form</p> Signup and view all the answers

    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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    Test your knowledge of file-based data management, database approach to data management, database management systems, and the advantages of database management.

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