Chapter quiz · Realtime, Streams & GraphQL

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8 questions on Realtime, Streams & GraphQL. Pass 70% to clear the chapter.

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Quiz

Realtime, Streams & GraphQL — Chapter Quiz

Eight questions on streaming responses, SSE, WebSockets, Mercurius GraphQL, undici, BullMQ, OpenTelemetry, clustering, and microservices.

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  1. Question 1
    1

    To stream a response, what kind of value should the handler return?

  2. Question 2
    2

    What content type identifies Server-Sent Events?

  3. Question 3
    3

    @fastify/websocket handles WebSocket upgrades on routes registered with { websocket: true }.

  4. Question 4
    4

    What is Mercurius?

  5. Question 5
    5

    The Node-native HTTP client recommended for outbound calls from Fastify (built by the same team) is called ____.

  6. Question 6
    6

    Which library is most commonly used for background job queues in Node/Fastify apps?

  7. Question 7
    7

    What does OpenTelemetry add to a Fastify app?

  8. Question 8
    8

    Which patterns help a Fastify app scale beyond a single process?

    Select all that apply.

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