This 200-901 practice question tests your understanding of infrastructure and automation. 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.
In a Python script using the 'requests' library to interact with Cisco DNA Center API, which function call is used to send a POST request with JSON data?
requests.post(url, json=data)
post() sends POST with JSON.
requests.patch(url, json=data)
Why wrong: patch() is for PATCH.
requests.get(url, json=data)
Why wrong: get() is for GET requests.
requests.put(url, json=data)
Why wrong: put() is for PUT requests.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
requests.post(url, json=data)
Option A is correct because the `requests.post()` function is specifically designed to send HTTP POST requests, and passing the `json=data` parameter automatically serializes the Python dictionary to JSON and sets the `Content-Type` header to `application/json`. This is the standard way to create a resource via Cisco DNA Center's REST API endpoints that expect JSON payloads.
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.
requests.post(url, json=data)
Why this is correct
post() sends POST with JSON.
Related concept
Read the scenario before looking for a memorised answer.
requests.patch(url, json=data)
Why it's wrong here
patch() is for PATCH.
requests.get(url, json=data)
Why it's wrong here
get() is for GET requests.
requests.put(url, json=data)
Why it's wrong here
put() is for PUT requests.
Common exam traps
Cisco often tests the distinction between POST and PUT by having candidates confuse resource creation (POST) with resource replacement (PUT), especially when both methods accept a JSON body.
Detailed technical explanation
Under the hood, `requests.post(url, json=data)` calls `json.dumps(data)` to serialize the dictionary and sets the `Content-Type` header to `application/json` automatically. Cisco DNA Center's API endpoints, such as those for creating a site or adding a device, require POST with a JSON body; using the wrong HTTP method (e.g., PUT) would result in a 405 Method Not Allowed error or unintended resource replacement. A real-world scenario is automating network provisioning where you must POST a device claim request to the `/dna/intent/api/v1/network-device` endpoint.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
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FAQ
Infrastructure and Automation — This question tests Infrastructure and Automation — Read the scenario before looking for a memorised answer..
The correct answer is: requests.post(url, json=data) — Option A is correct because the `requests.post()` function is specifically designed to send HTTP POST requests, and passing the `json=data` parameter automatically serializes the Python dictionary to JSON and sets the `Content-Type` header to `application/json`. This is the standard way to create a resource via Cisco DNA Center's REST API endpoints that expect JSON payloads.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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