Distributed Databases Systems - Part II Quiz
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Questions and Answers

What is the relational model in a distributed database system?

  • A collection of tables with different columns and rows
  • An instance of tables with columns representing different domains
  • A time-varying set of ntuples with values from various domains
  • A finite set of n-tuples with defined attributes over distinct domains (correct)
  • What does Database Integration involve in a distributed database system?

  • Separating data across multiple databases for security purposes
  • Creating duplicate copies of data for backup purposes
  • Combining data from different databases into a single logical view (correct)
  • Ensuring data consistency within a single database only
  • What is the purpose of Semantic Data Control in a distributed database system?

  • Replicating data across multiple servers for faster access
  • Enforcing constraints and rules to ensure data consistency and integrity (correct)
  • Encrypting all data to prevent unauthorized access
  • Creating different views of the same data for different user roles
  • In Distributed Query Processing, what is the main challenge faced by the system?

    <p>Coordinating queries that involve multiple databases and sites</p> Signup and view all the answers

    What is the primary function of Data Replication in a distributed database system?

    <p>Creating and maintaining duplicate copies of data across multiple sites</p> Signup and view all the answers

    What is a key feature of Parallel Database Systems in a distributed environment?

    <p>Processing queries concurrently to improve performance</p> Signup and view all the answers

    What is the typical distance range for nodes in a Wide Area Network (WAN)?

    <p>Up to thousands of kilometers</p> Signup and view all the answers

    Which network type is known for having limited geographic scope?

    <p>Local Area Network (LAN)</p> Signup and view all the answers

    What type of network topology exhibits regularity in interconnections?

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

    Which medium access method is typically used in a Bus network?

    <p>Carrier Sense Multiple Access with Collision Detection (CSMA/CD)</p> Signup and view all the answers

    In which type of network would you likely encounter speeds ranging from 150Mbps to 10Gbps?

    <p>Wide Area Network (WAN)</p> Signup and view all the answers

    What is the main purpose of normalization in database design?

    <p>To have each relation contain an independent set of facts</p> Signup and view all the answers

    Which normal form focuses on atomic values?

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

    In distributed database design, what does BCNF stand for?

    <p>Boyce-Codd Normal Form</p> Signup and view all the answers

    What is the top-down methodology used in normalization known for?

    <p>Producing a schema through refinements and decompositions</p> Signup and view all the answers

    What characteristic should decomposed schemas follow to preserve the semantics of the original schema?

    <p>Maintain the relationships and meanings of the original schema</p> Signup and view all the answers

    What is the process of concept separation applied in normalization known as?

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

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