Implement Control Flow of Consumer Code for Unrecoverable REST API Errors 350-901 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   Which HTTP status code most clearly indicates an unrecoverable REST API error that should not be retried?

   • A503 Service Unavailable
   • B500 Internal Server Error
   • C404 Not Found
   • D429 Too Many Requests
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2. 17foundation · easy

   Which code snippet uses a conditional statement to handle an unrecoverable REST API error?

   • Aif response.status_code == 404: return None
   • Bwhile response.status_code == 404: response = requests.get(url)
   • Ctry: response = requests.get(url) except: pass
   • Dfor i in range(3): response = requests.get(url)
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4. 18application · medium

   A Python script uses the Webex Teams API to create a room and then posts a message to it. The script receives an HTTP 404 Not Found when posting the message, even though the room creation returned a 201. The room ID in the message payload is hardcoded. What control flow should the script implement?

   • ACatch the 404, log the invalid room ID, and exit the script with a non-zero status
   • BRe-create the room automatically and then post the message
   • CFall back to posting the message to the organization's default room
   • DRetry the POST message request five times with a 5-second delay
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5. 19expert · hard

   A Python script uses the requests library to call the Cisco SD-WAN vManage API. The script needs to handle three error types differently: 401 (token expired), 404 (resource not found), and 503 (service unavailable). The developer wants to use a single try/except block with a custom exception hierarchy. Which control flow design is most maintainable?

   • AUse a while loop that retries all errors until a 2xx response is received
   • BUse multiple nested try/except blocks, one for each error type
   • CDefine custom exceptions for each error type and raise them in the except block based on the status code
   • DUse a single generic exception and handle all error types in the caller
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6. 20expert · hard

   A developer is writing a Python function that calls the Cisco DNA Center API to retrieve a device's configuration. The function must handle the case where the device is not found (HTTP 404) by returning None, and the case where the API is rate-limiting (HTTP 429) by retrying. The developer wants to avoid using exceptions for control flow. Which approach is most appropriate?

   • AUse an if/elif chain to check the status code and handle each case explicitly
   • BUse a return statement to exit the function on any non-2xx response
   • CUse a while loop that retries all non-2xx responses until a 2xx is received
   • DUse a try/except block to catch the HTTPError and handle each case
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