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200-901 Practice Question: A developer is using the Cisco Webex Teams API to…
A developer is using the Cisco Webex Teams API to create a room and add members. The API returns a 400 error. What is the most likely cause?
⚠ Common exam trap
Cisco often tests the distinction between HTTP 4xx status codes, leading candidates to confuse authentication errors (401) with client-side request errors (400) when the actual issue is missing or malformed data.
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
✓
Missing required fields
A 400 Bad Request error from the Cisco Webex Teams API indicates that the server cannot process the request due to a client-side error, most commonly missing required fields in the request body. When creating a room, the API requires a 'title' field; omitting it or sending an empty value triggers a 400 response. This is distinct from authentication or network issues, which produce different HTTP status codes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Invalid access token
Why it's wrong here
Invalid token would result in a 401 Unauthorized.
- ✓
Missing required fields
Why this is correct
400 errors are commonly due to missing or invalid fields.
- ✗
Network connectivity issue
Why it's wrong here
Network issues typically result in timeout or connection errors, not a 400 response.
- ✗
Room name already exists
Why it's wrong here
Duplicate names might cause a 409 Conflict, not 400.
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JA
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.