2. Describe Common Usage Patterns Related to Webhooks 200-901 Practice Questions (Page 7)

Questions 31–35

1. 31foundation · easy

   Which sequence correctly describes the typical webhook event flow?

   • AClient polls server → server returns event data → client processes data
   • BServer sends GET request to client → client responds with event data → server processes
   • CEvent occurs → server sends HTTP POST to registered URL → client receives payload
   • DClient registers URL → client sends POST to server → server stores event
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2. 32application · medium

   An IoT platform monitors temperature sensors in a data center. The platform must alert the facilities team as soon as a sensor reading exceeds a threshold. The facilities team uses a custom dashboard that can receive HTTP POSTs. Which mechanism should the platform use to deliver the alert?

   • APublish the sensor data to a public MQTT broker and have the dashboard subscribe to the topic.
   • BSend an HTTP POST to the dashboard's registered webhook URL when the threshold is crossed.
   • CStore the sensor readings in a database and let the dashboard query the database every 5 minutes.
   • DSend an email to the facilities team using the platform's SMTP server.
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4. 33foundation · easy

   Which format is most commonly used for webhook payloads?

   • ACSV
   • BXML
   • CYAML
   • DJSON
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5. 34expert · hard

   A webhook receiver is parsing a JSON payload that includes a 'signature' field. The receiver also has a shared secret. The team wants to verify that the payload has not been tampered with. What is the correct way to use the signature?

   • ADecode the signature and compare it to the payload's 'eventType' field.
   • BIgnore the signature and rely on HTTPS for integrity.
   • CUse the signature as an API key to authenticate the request.
   • DCompute an HMAC of the raw request body using the shared secret and compare it to the signature.
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6. 35foundation · easy

   How does a webhook differ from polling in API communication?

   • AWebhooks deliver data in real time via push, while polling requires the client to periodically check for updates
   • BWebhooks use pull-based delivery, while polling uses push-based delivery
   • CWebhooks are only used for REST APIs, while polling is used for SOAP APIs
   • DWebhooks require the client to continuously request updates, while polling sends data automatically
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