Distributed Systems
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Questions and Answers

What is a distributed system?

  • A single computer that performs all tasks
  • A centralized system with a single point of failure
  • A collection of independent components located on a single machine
  • A group of computers working together to appear as a single computer (correct)

    • What is a key advantage of a distributed system compared to a centralized system?

  • Ability to tolerate failures and scale for many users (correct)
  • Easier to understand and simpler architecture
  • Faster performance for a single user
  • More complex architecture

    • Why are distributed systems important in modern applications?

  • Because they are slower and less reliable
  • Because they provide a single interface to the end-user (correct)
  • Because they are more complex and scalable
  • Because they are easier to understand

    • What is a characteristic of a distributed system?

    <p>State is divided over multiple computers</p> Signup and view all the answers

    What is an example of a distributed system?

    <p>A network of computers communicating with each other</p> Signup and view all the answers

    What is required for a distributed system to function?

    <p>A network that connects all components</p> Signup and view all the answers

    What is communicated between machines in a distributed system?

    <p>Forms of data such as databases, objects, and files</p> Signup and view all the answers

    What is important for reliable communication in a distributed system?

    <p>The way messages are communicated reliably</p> Signup and view all the answers

    What was the primary reason for the creation of distributed systems?

    <p>To scale services and applications</p> Signup and view all the answers

    In a client-server architecture, what is the role of the server?

    <p>To act as a shared resource for multiple clients</p> Signup and view all the answers

    What is a characteristic of three-tier architecture?

    <p>Clients are not required to be intelligent</p> Signup and view all the answers

    Which of the following is an example of a multi-tier architecture?

    <p>Google.com</p> Signup and view all the answers

    What is a characteristic of peer-to-peer architecture?

    <p>Each machine can take on both client and server roles</p> Signup and view all the answers

    Which of the following is an example of a peer-to-peer architecture?

    <p>A blockchain network</p> Signup and view all the answers

    Study Notes

    Distributed Systems

    • A group of computers working together to appear as a single computer to the end-user.
    • A collection of independent components located on different machines that share messages to achieve common goals.

    Centralized System vs Distributed System

    • Centralized system: State stored on a single computer, simpler, easier to understand, and can be faster for a single user.
    • Distributed system: State divided over multiple computers, more robust, more scalable, and more complex.

    Why Build a Distributed System?

    • One interface to the end-user.
    • Maximize resources and information while preventing failures.
    • Reliability: if one system fails, it won't affect the availability of the service.
    • Dependency on cloud and scaling.

    Characteristics of Distributed Systems

    • Growing and everywhere in modern applications.
    • Rely on distributed systems such as networks, LAN/Internet, distributed real-time systems, parallel processing, cloud computing, distributed artificial intelligence, and distributed database systems.

    Essential Components of Distributed Systems

    • Network that connects all components.
    • Hardware or software that communicates with each other through IP addresses.
    • Messages passed between machines containing data that systems want to share (e.g., databases, objects, files).

    Four Architecture Types

    Client-Server

    • A server as a shared resource (e.g., printer, database, web server).
    • Multiple clients use the shared resource.

    Three-Tier

    • Clients no longer need to be intelligent.
    • Can rely on a middle tier to do processing and decision-making.
    • Most first web applications fall under this category.

    Multi-Tier (n-Tier)

    • Enterprise web services created n-tier or multi-tier systems architectures.
    • Interacts with data tiers and presentation tiers (e.g., google.com).

    Peer-to-Peer

    • No centralized or special machine that does the heavy lifting and intelligent work.
    • All decision-making and responsibilities are split amongst the machines involved.
    • Each machine can take on client or server roles (e.g., blockchain).

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    Description

    Learn about the basics of distributed systems, including how they differ from centralized systems, and their advantages and disadvantages.

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