Advantages and Disadvantages of Database Systems (DBMS's)
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Questions and Answers

What is the backbone and most critical resource of an organization?

  • Competitive Edge
  • Data (correct)
  • Information
  • Computer Media

    • According to Burch et.al., what is information?

  • Meaningless data
  • Data without errors
  • Data put into meaningful and useful content (correct)
  • Raw facts

    • What does quality information mean?

  • Nonexistent data
  • Accurate, timely, and relevant information (correct)
  • Relevant data
  • Timely data

    • What does accuracy in information mean?

    <p>Free from errors</p> Signup and view all the answers

    What is the primary purpose of a Database Management System (DBMS)?

    <p>To define, create, use, and maintain a database</p> Signup and view all the answers

    Which type of records may vary in length within a file?

    <p>Both fixed length and variable length records</p> Signup and view all the answers

    What were some disadvantages of the traditional file system approach?

    <p>Limited data sharing</p> Signup and view all the answers

    What are some advantages of the database approach over the file-based approach?

    <p>Controlled redundancy and improved data integrity</p> Signup and view all the answers

    What is the main advantage of Database Systems (DBMS) mentioned in the text?

    <p>Improved backup and recovery facility</p> Signup and view all the answers

    Which aspect is a disadvantage of Database Systems according to the text?

    <p>Organizational conflict</p> Signup and view all the answers

    What is the purpose of the database model or schema according to the text?

    <p>To specify data items, their characteristics, and relationships</p> Signup and view all the answers

    What does the 'database state' represent according to the text?

    <p>Data in the database at a particular moment</p> Signup and view all the answers

    What is the function of the catalog in a DBMS?

    <p>It contains the data definitions and ensures consistency of the data models</p> Signup and view all the answers

    Who is responsible for implementing and monitoring the database infrastructure?

    <p>Database Administrator (DBA)</p> Signup and view all the answers

    What does the internal layer of the data model specify?

    <p>How the data are stored or organized physically</p> Signup and view all the answers

    What is the purpose of the external data model's views?

    <p>To offer a window on a carefully selected part of the logical data model</p> Signup and view all the answers

    Study Notes

    Organization's Critical Resource

    • Information is the backbone and most critical resource of an organization.

    Definition of Information

    • According to Burch et al., information is the result of processing, analyzing, and interpreting data.

    Quality and Accuracy of Information

    • Quality information means information that is relevant, timely, and useful for decision-making.
    • Accuracy in information means the correctness and precision of the information.

    Database Management System (DBMS)

    • The primary purpose of a DBMS is to define, create, maintain, and manipulate databases.

    File Systems

    • Variable-length records are a type of records that may vary in length within a file.
    • Disadvantages of the traditional file system approach include:
      • Data redundancy and inconsistency
      • Difficult data access and manipulation
      • Inadequate data security

    Database Approach

    • Advantages of the database approach over the file-based approach include:
      • Improved data sharing and integration
      • Better data consistency and reduced redundancy
      • Improved data security and reduced data duplication

    Database Systems (DBMS)

    • Main advantage: improved data management and reduced data redundancy.
    • Disadvantage: increased complexity and cost.

    Database Model or Schema

    • The purpose of the database model or schema is to define the structure and relationships of the data.

    Database State

    • The database state represents the current state of the data in the database.

    Catalog in a DBMS

    • The catalog maintains information about the database structure, including schema, views, and access controls.

    Database Administrator

    • The Database Administrator (DBA) is responsible for implementing and monitoring the database infrastructure.

    Data Model Layers

    • The internal layer of the data model specifies how the data is physically stored.
    • The external data model's views provide a customized view of the data for different users.

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    Description

    Explore the advantages and disadvantages of using Database Management Systems (DBMS's), including efficient data access, improved backup and recovery facilities, and increased programmer productivity, as well as the complexities, additional disk space requirements, and costs associated with hardware and conversion.

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