Quick Answer
The answer is that the bot is not a member of those rooms. This is the most likely reason because the Cisco Webex Teams API returns a 404 error when a bot attempts to access a room it hasn't been added to; from the API's perspective, the room resource simply does not exist for that bot, even though the room exists for other users. On the Cisco DevNet Associate 200-901 exam, this scenario tests your understanding of API scoping and bot permissions—a common trap is assuming a 404 always means the room ID is wrong, when in fact the bot’s membership is the hidden variable. Remember that a bot can only see and interact with rooms where it has been explicitly invited; if your script works for some rooms but fails with a 404 on others, always check the bot’s membership list first. A useful memory tip: “No membership, no resource—404 means the bot can’t see the door.”
This 200-901 practice question tests your understanding of cisco platforms and development. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A developer is writing a Python script using the Cisco Webex Teams API to send a message to a specific room. The script works for some rooms but fails for others with a 404 error. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
The API rate limit has been exceeded for those rooms.
Why wrong: Rate limit returns 429.
The access token is invalid for those rooms.
Why wrong: Token issues return 401.
The bot does not have permission to send messages in those rooms.
Why wrong: Permission issues return 403.
The bot is not a member of those rooms.
Non-membership results in 404 when trying to send to a room.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The bot is not a member of those rooms.
The 404 error indicates that the resource (the room) was not found by the API. In the Cisco Webex Teams API, a bot can only interact with rooms it has been added to as a member. If the bot is not a member of a room, the API cannot locate the room from the bot's perspective, resulting in a 404 error. This is the most common cause of intermittent 404 errors when the script works for some rooms but not others.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The API rate limit has been exceeded for those rooms.
Why it's wrong here
Rate limit returns 429.
The access token is invalid for those rooms.
Why it's wrong here
Token issues return 401.
The bot does not have permission to send messages in those rooms.
Why it's wrong here
Permission issues return 403.
The bot is not a member of those rooms.
Why this is correct
Non-membership results in 404 when trying to send to a room.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Cisco often tests the distinction between HTTP status codes (404 vs 403 vs 401) and their specific meanings in the context of API authorization and resource existence, leading candidates to confuse permission issues (403) with membership/visibility issues (404).
Detailed technical explanation
The Webex Teams REST API uses resource-based permissions; a bot's access token is scoped to specific resources (rooms, messages, etc.) but the actual ability to see a room depends on membership. When the bot sends a POST request to /messages with a roomId, the API first verifies the bot's membership in that room. If the bot is not a member, the API treats the room as non-existent (404) rather than revealing its existence (which would be a security concern). This behavior aligns with RESTful principles where unauthorized access to a resource should not disclose its existence.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Cisco Platforms and Development — This question tests Cisco Platforms and Development — Read the scenario before looking for a memorised answer..
The correct answer is: The bot is not a member of those rooms. — The 404 error indicates that the resource (the room) was not found by the API. In the Cisco Webex Teams API, a bot can only interact with rooms it has been added to as a member. If the bot is not a member of a room, the API cannot locate the room from the bot's perspective, resulting in a 404 error. This is the most common cause of intermittent 404 errors when the script works for some rooms but not others.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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