Web Service Week 1-1
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Questions and Answers

What is a distributed system?

  • A single computer handling multiple tasks.
  • A collection of independent computers that appears as a single coherent system. (correct)
  • A single database system distributed across multiple locations.
  • None of the above.

    • Which of the following is NOT a characteristic of a distributed system?

  • All components must be on the same operating system. (correct)
  • Components communicate via message passing.
  • Components interact to achieve a common goal.
  • Distributed systems can be built using multiple heterogeneous systems.

    • Why are some systems inherently distributed?

  • For economic reasons only.
  • Due to the necessity of handling large-scale data and applications like file sharing and IoT. (correct)
  • They require a single central server for operation.
  • They do not need internet access.

    • What is the main advantage of using distributed systems for large online applications like Google or Amazon?

    <p>Scalability to handle large traffic and data processing needs.</p> Signup and view all the answers

    What is fault tolerance in distributed systems?

    <p>The system's capacity to continue operating even if some components fail.</p> Signup and view all the answers

    Distributed systems require all components to operate without any faults.

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

    Scalability in distributed systems is achieved through horizontal scaling, adding more machines as needed.

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

    Explain the concept of transparency in distributed systems.

    <p>Transparency in distributed systems refers to hiding the complexity of the system's processes and their physical distribution across multiple computers from the users, presenting the system as a single coherent entity.</p> Signup and view all the answers

    What are the economic reasons for adopting distributed systems?

    <p>Economically, distributed systems allow for resource sharing and reduced costs by using clusters of commodity servers instead of more expensive mainframe computers. This setup also facilitates system scalability and fault tolerance.</p> Signup and view all the answers

    Describe the role of asynchronous communication in distributed systems.

    <p>Asynchronous communication in distributed systems involves making a call and proceeding with other operations without waiting for a response. This mode helps in reducing tight coupling between system components and is useful for non-interactive applications or periodic information updates to clients.</p> Signup and view all the answers

    Study Notes

    Distributed Systems Definition

    • A distributed system is a system composed of multiple components that work together to achieve a common goal.

    Characteristics of Distributed Systems

    • Not a characteristic of a distributed system: requiring all components to operate without any faults.
    • Distributed systems are inherently distributed in some cases, such as when multiple machines or locations are needed to process a large amount of data or requests.

    Advantages of Distributed Systems

    • The main advantage of using distributed systems for large online applications like Google or Amazon is the ability to handle a large volume of requests and data.

    Fault Tolerance

    • Fault tolerance in distributed systems is the ability of the system to continue operating even when one or more components fail.

    Scalability

    • Scalability in distributed systems is achieved through horizontal scaling, adding more machines as needed to increase processing power and handle increased load.

    Transparency

    • Transparency in distributed systems means that the system hides its internal complexity and distribution from the user, making it appear as a single, unified system.

    Economic Reasons

    • Economic reasons for adopting distributed systems include the ability to scale up or down as needed, reducing the need for expensive hardware upgrades and improving resource utilization.

    Asynchronous Communication

    • Asynchronous communication in distributed systems allows components to communicate with each other independently, without waiting for a response from other components, improving system responsiveness and performance.

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