ESD Week 5
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Questions and Answers

Which of the following communication patterns can be implemented by using message-oriented middleware?

  • one-to-many; one-to-one
  • fire-forget; publish-subscribe
  • All of the above (correct)
  • None of the above

    • In a Topic exchange in RabbitMQ, which of the following binding keys would NOT match the routing key sg.east.food.ponggolnasilemak?

  • sg.#
  • sg.*.food.ponggolnasilemak
  • *.ponggolnasilemak (correct)
  • #

    • Regarding AMQP, which statement is FALSE?

  • Fanout exchanges ignore routing keys and send messages to all bound queues
  • A Topic exchange can 'simulate' a direct exchange
  • AMQP is an implementation of RabbitMQ (correct)
  • In binding keys, * can be substituted for exactly one word

    • In the context of RabbitMQ, which of the following statements are TRUE?

    <p>All of the above</p> Signup and view all the answers

    UserMapService <-- 2.Receive driver location and update it on map -- AMQP Broker <-- 1. Send current GPS location (Driver Service)

    <p>async fire-forget</p> Signup and view all the answers

    Consider the scenario diagram. Which of the following is the most appropriate pattern for this type of communication? (Refer to G. Docs)

    <p>asynchronous request-reply</p> Signup and view all the answers

    Study Notes

    Communication Patterns with Message-Oriented Middleware

    • Message-oriented middleware enables asynchronous communication, decoupling message producers from consumers.
    • Common communication patterns include point-to-point and publish-subscribe.
    • Use of middleware allows scalability and reliability in message delivery.

    RabbitMQ Topic Exchange and Binding Keys

    • In RabbitMQ, binding keys are used to route messages in a topic exchange.
    • A routing key of sg.east.food.ponggolnasilemak would NOT match any binding keys that are restricted to either a specific region or category (e.g., sg.east.food.*).

    AMQP False Statement Identification

    • AMQP (Advanced Message Queuing Protocol) supports various messaging patterns, but some common misconceptions exist regarding its capabilities.
    • A false statement regarding AMQP may include claims of guaranteed delivery under all circumstances, which is not accurate as it depends on configuration and network conditions.

    RabbitMQ Context Statements

    • RabbitMQ facilitates message queuing and routing, using exchanges and queues effectively.
    • Communication patterns in RabbitMQ can include direct, fanout, topic, and headers exchanges.
    • True statements about RabbitMQ typically highlight its flexibility, ease of use, and support for multiple messaging protocols.

    Scenario Communication Patterns

    • In the given scenario with UserMapService and AMQP Broker, the communication involves receiving updates about driver location, which indicates a request-response pattern or publish-subscribe pattern depending on the context.
    • Current GPS location updates from Driver Service to the UserMapService suggest the need for real-time data exchange methods.

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    Test your knowledge on communication patterns that can be implemented using message-oriented middleware. Identify which patterns are suitable for this type of middleware.

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