200-901 Cisco Platforms and Development Practice Question
A developer wants to send a message to a Webex room using the API. The message should contain a simple text body. Which endpoint and parameter are required?
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 body parameter 'roomId' and 'text'
To send a message, a POST request is made to /v1/messages with a JSON body containing roomId and text (or markdown). roomId identifies 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.
- ✗
GET /v1/messages with query parameter 'roomId'
Why it's wrong here
GET /v1/messages retrieves existing messages using query parameters such as roomId; it cannot create or send a message. It is tempting because it references messages and rooms. It would be correct when listing or reading a room's message history, not when posting new text.
- ✗
POST /v1/memberships with body parameter 'message'
Why it's wrong here
POST /v1/memberships adds a person to a room and expects a personId or personEmail, not a message body. It is tempting because memberships relate to rooms. It would be correct when adding or removing room participants, not when posting a text message to a room.
- ✗
POST /v1/rooms with body parameter 'text'
Why it's wrong here
POST /v1/rooms creates a new room with a title, not a message; the 'text' parameter belongs to the messages endpoint. It is tempting because rooms are the destination. It would be correct when provisioning a new collaboration space, not when sending a message into an existing room.
- ✓
POST /v1/messages with body parameter 'roomId' and 'text'
Why this is correct
The Webex messaging endpoint accepts a POST to /v1/messages, where the JSON body supplies the target 'roomId' and the message content via the 'text' parameter. This pairing delivers a plain-text message to the specified room, matching the developer's simple text-body requirement.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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