200-901 Understanding and Using APIs Practice Question
An application needs to receive real-time notifications when a new message is posted in a Webex space. Which Webex API feature should be used?
⚠ Common exam trap
Cisco often tests the distinction between push-based (webhooks) and pull-based (polling) mechanisms, and candidates may mistakenly assume WebSocket or SSE are available because they are common real-time technologies, but Webex specifically relies on webhooks for event-driven notifications.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a webhook that triggers on 'messages' events
Webex uses webhooks to push real-time event notifications to an external server. By creating a webhook that triggers on 'messages' events, the application receives an HTTP POST request whenever a new message is posted in the specified space, eliminating the need for polling or persistent connections.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Establish a WebSocket connection to the Webex API
Why it's wrong here
Webex does not offer WebSocket endpoints for messaging.
- ✓
Create a webhook that triggers on 'messages' events
Why this is correct
Webhooks provide real-time event notifications.
- ✗
Use Server-Sent Events (SSE) from the Webex API
Why it's wrong here
Webex does not support SSE.
- ✗
Poll the messages endpoint every second
Why it's wrong here
Polling is not real-time and wastes resources.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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