Fun Quiz

Pub/Sub

ByAdmin

1. What is a topic?

 

  • A resource that generates subscriptions for devices to connect to the cloud.
  • A resource that generates messages to send to subscribers.
  • A resource that accepts messages sent by publishers.

 

2. What is a subscription?

 

  • A resource of streaming messages from a single topic.
  • A resource of streaming messages from multiple topics.
  • A resource of streaming messages that are sent to a publisher.

 

3. A topic can have _______ publishers.

 

  • many 
  • one

4. How many topics can a subscriber subscribe to?

 

  • many
  • one 

 

5. What happens to messages if they cannot be delivered?

 

  • Messages remain in the message store until a user defined time, then they are no longer retained.
  • Messages remain in the message store until the are delivered and acknowledged.
  • Messages that cannot be delivered must be sent again, leading to potential communication choke points.

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