Information Systems Quiz
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Questions and Answers

What is the primary function of a system administrator?

  • To perform data analysis for business decisions
  • To design new software applications
  • To oversee client interactions and support
  • To manage the infrastructure and operations of systems (correct)
  • Which processing mode entails all processing being performed by a single computer?

  • Decentralized Processing
  • Distributed Processing
  • Cloud Processing
  • Centralized Processing (correct)
  • How is system availability calculated?

  • A = MTTR / MTBF
  • A = MTBF / (MTBF + MTTR) (correct)
  • A = (MTBF + MTTR) / MTTR
  • A = MTTR + MTBF
  • Which of the following is not a component of RASIS?

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

    What does the term MTTR stand for in the context of system serviceability?

    <p>Mean Time To Repair</p> Signup and view all the answers

    Which processing mode involves distributing tasks among multiple connected computers?

    <p>Distributed Processing</p> Signup and view all the answers

    Which component of RASIS measures the normal operation time of a system?

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

    What does the formula for availability (A) represent?

    <p>A = MTBF / (MTBF + MTTR)</p> Signup and view all the answers

    Which of the following best describes security in the context of RASIS?

    <p>Protection of data from unauthorized access</p> Signup and view all the answers

    What does the Mean Time To Repair (MTTR) indicate within system serviceability?

    <p>The time required to recover from failures</p> Signup and view all the answers

    Study Notes

    Information Systems

    • A computer system within a company or organization used for sharing information.

    Client/Server System

    • Client: A computer that receives a service; includes terminal devices.
    • Server: A computer that provides a service; includes host computers.

    Processing Modes

    • Centralized Processing: All processing done by a single computer.
    • Distributed Processing: System where processing is divided between multiple connected computers on a network.

    System Administrator

    • Someone who maintains the systems used by others, ensuring smooth and efficient operation for users.

    RASIS

    • Measures system safety and efficiency.
    • Reliability: Measured by MTBF (Mean Time Between Failures); essentially the normal operation time.
    • Availability: Ratio of possible usage of the system; calculated as A = MTBF / (MTBF + MTTR).
    • Serviceability: Ease of maintaining the system, computed as MTTR (Mean Time To Repair), representing the down time.
    • Integrity: Preventing data corruption.
    • Security: Ensuring the security of data.

    System Reliability

    • Ensuring the system continues operating without interruptions (no functions halting).
    • MTBF = Mean Time Before Failure

    System Availability

    • Percentage denoting uninterrupted availability.

    Availability for Simple Systems

    • Availability = MTBF / (MTBF + MTTR)
    • MTBF: Average time for continuous system operation.
    • MTTR: Average time to repair the system if it fails.

    Availability Calculation Example

    • Example shown of calculating availability using MTBF and MTTR values.

    Complex Systems

    • Series Systems: System functions only if all components are operational (Availability = A1 × A2).
    • Parallel Systems: System functions as long as at least one component is operational (Availability = 1 − (1 − A1) × (1 − A2)).

    Additional Example

    • A LAN system example with two PCs, one file server, and a printer is given. Availability for each component is provided (0.9 for file server and printer, 0.8 for each PC) and the system operates if at least one PC is operational.

    Communication Systems

    • Figures are used to represent a configuration for communication between two sites.
    • Units (E to H) form communication paths.

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    Related Documents

    System Components PDF

    Description

    Test your knowledge on information systems, client/server architectures, and processing modes. This quiz covers essential concepts including system administration and reliability metrics. Perfect for students and professionals looking to refresh their understanding.

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