Distributed Systems Overview
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Questions and Answers

What is a critical feature of a distributed system?

  • Single machine processing
  • Centralized architecture
  • Scalability
  • Reliability of message communication (correct)

    • Why were distributed systems created?

  • To scale services and applications (correct)
  • To improve the security of systems
  • To add more machines to a system
  • To reduce the complexity of systems

    • In a three-tier architecture, what is the role of the middle tier?

  • To do the processing and decision making (correct)
  • To store data
  • To act as a client
  • To act as a server

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

    <p>All machines have equal responsibilities</p> Signup and view all the answers

    What is an example of a multi-tier system?

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

    What is the primary advantage of a client-server architecture?

    <p>Multiple clients can share a resource</p> Signup and view all the answers

    What is a primary advantage of a distributed system over a centralized system?

    <p>Improved scalability</p> Signup and view all the answers

    What is a key characteristic of distributed systems?

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

    Why are distributed systems widely used in modern applications?

    <p>They are more robust and can tolerate failures</p> Signup and view all the answers

    What is an example of a distributed real-time system?

    <p>Uber and logistics use real-time tracking systems</p> Signup and view all the answers

    What is a key requirement for distributed systems to function?

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

    What is an advantage of distributed systems in terms of performance?

    <p>They can maximize resources and information while preventing failures</p> Signup and view all the answers

    What is an example of a distributed system?

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

    What is a key difference between distributed systems and centralized systems?

    <p>Distributed systems are more scalable</p> Signup and view all the answers

    Study Notes

    Definition and Basic Terminologies

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

    Why Build a Distributed System?

    • A single interface to the end-user
    • Maximizes resources and information while preventing failures
    • Provides reliability, as if one system fails, it won't affect the availability of the service
    • Allows for scaling and growth of systems

    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

    Characteristics of Distributed Systems

    • Network that connects all components
    • Hardware or software that enables communication with an IP address
    • Messages passed between machines contain forms of data that the systems want to share (databases, objects, files)
    • Reliable communication is crucial, including sending, receiving, acknowledging, and retrying on failure

    Architecture Types of Distributed Systems

    Client-Server Architecture

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

    Three-Tier Architecture

    • Clients no longer need to be intelligent, relying on a middle tier for processing and decision-making
    • Most first web applications fall under this category
    • The middle tier could be called an agent that receives requests from clients and forwards it on to the servers

    Multi-Tier (n-Tier) Architecture

    • Enterprise web services created n-tier or multi-tier systems architectures
    • Interacts with data tiers and presentation tiers
    • Example: google.com

    Peer-to-Peer Architecture

    • No centralized or special machine that does the heavy lifting and intelligent work
    • Decision-making and responsibilities are split among the machines involved
    • Each machine can take on client or server roles
    • Example: Blockchain

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    Description

    This quiz covers the basics of distributed systems, including definitions, types, architectures, and examples. It also touches on cloud computing service and deployment models.

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