- A
Request additional OAuth scopes to include the actorId in the callback payload.
Why wrong: Scopes determine what can be read/written, not the structure of callbacks.
- B
Filter callbacks by the verb 'posted' to ensure the actorId is included.
Why wrong: The verb may vary, but actorId is present in most events; filtering by verb does not solve the missing field.
- C
Use the 'createdBy' field from the message details API as a fallback when 'actorId' is missing.
Why wrong: The message details API returns the creator of the message, but the callback should already include actorId.
- D
Check the 'resource' field in the callback to determine if it is a 'messages' event; only messages events include actorId.
The resource field indicates the object type; actorId is always present for messages events.
200-901 Cisco Platforms and Development Practice Question
This 200-901 practice question tests your understanding of cisco platforms and development. 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.
A developer is integrating a Webex Teams bot with an external system using the Webex API. The bot receives an HTTP POST callback from Webex every time a message is posted in a monitored space. The developer notices that sometimes the callback includes a 'data' object with 'actorId', but other times the 'actorId' is missing. The bot needs to log the identity of the person who posted the message. What should the developer do to reliably obtain the sender's identity?
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
Check the 'resource' field in the callback to determine if it is a 'messages' event; only messages events include actorId.
Option D is correct because the Webex API callback payload includes the 'actorId' only for certain event types. Specifically, when the 'resource' field is 'messages' and the 'event' field is 'created', the 'actorId' is guaranteed to be present, representing the user who posted the message. Filtering by the 'resource' field ensures the bot processes only message creation events, reliably obtaining the sender's identity.
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.
- ✗
Request additional OAuth scopes to include the actorId in the callback payload.
Why it's wrong here
Scopes determine what can be read/written, not the structure of callbacks.
- ✗
Filter callbacks by the verb 'posted' to ensure the actorId is included.
Why it's wrong here
The verb may vary, but actorId is present in most events; filtering by verb does not solve the missing field.
- ✗
Use the 'createdBy' field from the message details API as a fallback when 'actorId' is missing.
Why it's wrong here
The message details API returns the creator of the message, but the callback should already include actorId.
- ✓
Check the 'resource' field in the callback to determine if it is a 'messages' event; only messages events include actorId.
Why this is correct
The resource field indicates the object type; actorId is always present for messages events.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between webhook callback payload fields (like 'resource' and 'event') versus API response fields, leading candidates to confuse the callback structure with the API data model.
Detailed technical explanation
How to think about this question
Webex webhooks deliver a JSON payload containing 'resource' (e.g., 'messages', 'memberships'), 'event' (e.g., 'created', 'deleted'), and 'data' object. The 'actorId' is only present in the 'data' object for 'messages' events when the message is created by a user; for other resources like 'memberships' or 'attachmentActions', the 'actorId' may be omitted or represent a different entity. A robust bot should check the 'resource' field first, then use the 'actorId' from the callback or fall back to fetching the message details via GET /messages/{messageId} to obtain the 'personId' of the sender.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this 200-901 question test?
Cisco Platforms and Development — This question tests Cisco Platforms and Development — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Check the 'resource' field in the callback to determine if it is a 'messages' event; only messages events include actorId. — Option D is correct because the Webex API callback payload includes the 'actorId' only for certain event types. Specifically, when the 'resource' field is 'messages' and the 'event' field is 'created', the 'actorId' is guaranteed to be present, representing the user who posted the message. Filtering by the 'resource' field ensures the bot processes only message creation events, reliably obtaining the sender's identity.
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.
About these practice questions
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Last reviewed: Jun 24, 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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