- A
Establish a WebSocket connection to the Webex API
Why wrong: Webex does not offer WebSocket endpoints for messaging.
- B
Create a webhook that triggers on 'messages' events
Webhooks provide real-time event notifications.
- C
Use Server-Sent Events (SSE) from the Webex API
Why wrong: Webex does not support SSE.
- D
Poll the messages endpoint every second
Why wrong: Polling is not real-time and wastes resources.
Question 315 of 1,000
200-901 Understanding and Using APIs Practice Question
This 200-901 practice question tests your understanding of understanding and using apis. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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?
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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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.
Detailed technical explanation
How to think about this question
Webhooks in Webex are registered with a target URL, a resource (e.g., 'messages'), and an event (e.g., 'created'). When a new message is posted, Webex sends an HTTP POST with a JSON payload containing the message details and room ID. The application must respond with a 200 OK within a timeout (typically 2 seconds) to acknowledge receipt; otherwise, Webex may retry the delivery up to a few times. This pattern is defined in the Webex API documentation and follows standard RESTful webhook practices.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 200-901 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this 200-901 question test?
Understanding and Using APIs — This question tests Understanding and Using APIs — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 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.
What should I do if I get this 200-901 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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.
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