200-901 Cisco Platforms and Development Practice Question
A developer wants to receive real-time notifications when a new message is posted in a Webex room. Which Webex API resource should they use?
⚠ Common exam trap
Cisco often tests the distinction between synchronous polling (Messages API) and asynchronous event-driven notifications (Webhooks), trapping candidates who assume polling is acceptable for real-time requirements.
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
✓
Webhooks
Webhooks provide real-time HTTP callbacks triggered by events in Webex, such as a new message being posted. By registering a webhook on the 'messages' resource with the 'created' event, the developer's server receives a POST request immediately when a message is sent, eliminating the need for polling.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Webhooks
Why this is correct
Webhooks push event notifications to a supplied HTTPS endpoint the moment a message is created, satisfying the real-time constraint. Polling the messages resource would introduce latency and unnecessary API calls, so webhooks are the designed mechanism for immediate room activity alerts.
- ✗
Memberships API
Why it's wrong here
The Memberships API tracks who belongs to a room and their moderator status, not message content or posting events, so it cannot signal a new message. It is tempting because membership changes also generate events, and it would be correct for notifying when users join or leave a room.
- ✗
Rooms API
Why it's wrong here
The Rooms API manages room metadata such as titles and participants, not message events, so it cannot deliver notifications of new posts. It is tempting because room configuration is the natural starting point when integrating Webex, and it would be correct for creating rooms or listing membership details.
- ✗
Messages API polling
Why it's wrong here
Polling the Messages API repeatedly queries for new messages rather than pushing them, so notifications arrive only after the polling interval, not in real time. Polling is tempting because it works without a public webhook endpoint, and would suit low-volume, non-urgent retrieval where latency is acceptable.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.