Database Management Systems
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Questions and Answers

What is the primary key to organizational survival?

  • Good file system characteristics
  • Good decision making (correct)
  • Good information processing
  • Good data management

    • What is the result of processing raw data to reveal meaning?

  • Knowledge
  • Information (correct)
  • Wisdom
  • Data

    • What is the primary purpose of storing data in a database?

  • To process information
  • To store raw facts
  • To manage data efficiently (correct)
  • To make good decisions

    • What is the relationship between data and information?

    <p>Data is raw facts and information is processed data</p> Signup and view all the answers

    What is a characteristic of data?

    <p>It is a raw fact that can be recorded and has an implicit meaning</p> Signup and view all the answers

    What is the primary reason for understanding file system characteristics?

    <p>To understand how databases evolved</p> Signup and view all the answers

    What does program-data independence enable?

    <p>Changing data storage structures without having to change the DBMS access programs</p> Signup and view all the answers

    What is the primary function of concurrency control in a DBMS?

    <p>To guarantee correct execution or complete abortion of each transaction</p> Signup and view all the answers

    What is the advantage of using the database approach in terms of data storage?

    <p>Reducing data redundancy</p> Signup and view all the answers

    What is the purpose of data abstraction in a DBMS?

    <p>To hide storage details and present the users with a conceptual view of the database</p> Signup and view all the answers

    What is a major part of database applications?

    <p>OLTP (Online Transaction Processing)</p> Signup and view all the answers

    What is an advantage of using the database approach in terms of data security?

    <p>Restricting unauthorized access to data</p> Signup and view all the answers

    What is the primary activity of the DP department?

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

    What is the main problem with file systems in terms of data management?

    <p>All of the above</p> Signup and view all the answers

    What is the significance of structural independence?

    <p>Change file structure without affecting data access</p> Signup and view all the answers

    What is the main advantage of DBMS over file systems?

    <p>Elimination of most file system problems</p> Signup and view all the answers

    What is a characteristic of a well-designed database?

    <p>Facilitates data management</p> Signup and view all the answers

    What is the role of a DBMS in terms of data storage?

    <p>Creates and manages complex structures required for data storage</p> Signup and view all the answers

    What is data redundancy, and what does it lead to?

    <p>All of the above</p> Signup and view all the answers

    What is the purpose of a data dictionary in a DBMS?

    <p>To store definitions of data elements and relationships</p> Signup and view all the answers

    What is the significance of data independence?

    <p>Change data storage characteristics without affecting data access</p> Signup and view all the answers

    What is a characteristic of a poorly designed database?

    <p>Causes difficult-to-trace errors</p> Signup and view all the answers

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

    <p>To store and manage data</p> Signup and view all the answers

    What is the main difference between data and information?

    <p>Data is raw while information is processed</p> Signup and view all the answers

    What is the purpose of metadata in a database?

    <p>To provide data about data</p> Signup and view all the answers

    What is the term for the combination of the DBMS software and the data itself?

    <p>Database System</p> Signup and view all the answers

    What is the role of a DBMS in concurrent processing and sharing?

    <p>To allow multiple users to access the database simultaneously</p> Signup and view all the answers

    What is the primary goal of having accurate, relevant, and timely information?

    <p>To make informed decisions</p> Signup and view all the answers

    What type of access did magnetic tapes provide for data storage?

    <p>Sequential access</p> Signup and view all the answers

    Who defined the relational data model and later won the ACM Turing Award?

    <p>Ted Codd</p> Signup and view all the answers

    What type of database systems emerged in the 1990s?

    <p>Object-oriented database systems</p> Signup and view all the answers

    What was the primary focus of database research and development in the 1980s?

    <p>Parallel and distributed database systems</p> Signup and view all the answers

    In what decade did relational DBMS products emerge?

    <p>1980s</p> Signup and view all the answers

    What type of database systems were widely used in the late 1960s and 1970s?

    <p>Hierarchical and Network data models</p> Signup and view all the answers

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