200-901 Cisco Platforms and Development Practice Question
A developer needs to send a message to a specific room in Webex using the API. What is the correct endpoint and required body parameter for the room destination?
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
✓
POST /v1/messages with roomId parameter
To send a message to a Webex room, use POST /v1/messages with the roomId parameter to specify the target room.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
POST /v1/messages with roomId parameter
Why this is correct
POST /v1/messages accepts a roomId body parameter, which targets a specific Webex room directly rather than resolving a recipient email or person ID. This satisfies the stem's requirement to address a room destination, since roomId uniquely identifies that space within the Webex messaging API.
- ✗
POST /v1/messages with toPersonEmail parameter
Why it's wrong here
The toPersonEmail parameter addresses a single user's email, not a room, so the message would not reach the room destination. It is tempting because it is a valid messages parameter, and it would be the correct choice when messaging one individual directly rather than posting into a shared space.
- ✗
POST /v1/memberships with roomId
Why it's wrong here
Memberships manages room membership, not message delivery; the body takes personId or personEmail, so roomId is invalid there. Sending to a room requires POST /v1/messages with roomId. It tempts because membership endpoints do reference roomId, but only for adding or removing people.
- ✗
POST /v1/rooms with message text
Why it's wrong here
POST /v1/rooms creates a new room; it does not post a message, and it accepts no message text body parameter. It is tempting because the rooms resource is room-related, and it would be the correct choice when provisioning a new collaboration space rather than sending content into an existing one.
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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.