Implement Robust REST API Error Handling for Time Outs and Rate Limits 350-901 Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   A developer is integrating with a Cisco Webex API that returns the following headers on every response: X-RateLimit-Limit: 100, X-RateLimit-Remaining: 0, X-RateLimit-Reset: 1588888888. The developer's application needs to make 50 more requests. What should the application do next?

   • AWait until the Unix timestamp 1588888888 before making the next request, then continue at a rate that respects the limit of 100 per window.
   • BWait 100 seconds (the value of X-RateLimit-Limit) before making the next request.
   • CImmediately retry all 50 requests with a 1-second delay between each, since the limit is 100 per window.
   • DSwitch to a different API endpoint that has a higher rate limit, since the current limit is exhausted.
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2. 22application · medium

   A DevOps engineer is troubleshooting an integration that intermittently fails with timeouts and 429 responses. The engineer needs to diagnose whether the failures are caused by the client, the network, or the API server. What should the engineer log for each failed request?

   • AThe client IP address and the server hostname only.
   • BThe full request and response payloads for every request, including successful ones.
   • COnly the exception message and the timestamp of the failure.
   • DThe HTTP method, URL, response status code, Retry-After header value, elapsed time, and the exception type.
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4. 23foundation · easy

   A Python script uses the `requests` library to call a REST API that occasionally takes up to 15 seconds to respond. The developer wants to prevent the script from hanging indefinitely while still allowing normal responses to complete. Which configuration is most appropriate?

   • ASet `timeout=5` to fail fast
   • BSet `timeout=(5, 15)` to separate connection and read timeouts
   • CSet `timeout=20` to allow slow responses
   • DSet `timeout=None` to disable timeouts entirely
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5. 24application · medium

   A Python script calls a Cisco DNA Center API and receives a 'Read timed out' exception. The script's retry logic currently retries 3 times with a fixed 2-second delay. The engineer notices that the API is slow during peak hours and the fixed delay is not enough. What should the engineer change?

   • AIncrease the number of retries to 10 with the same 2-second fixed delay.
   • BIncrease the fixed delay to 10 seconds for all retries.
   • CRemove the retry logic and rely on the API to be fast enough.
   • DChange the retry delay to exponential backoff starting at 2 seconds and doubling each time (2, 4, 8 seconds).
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6. 25foundation · easy

   A client receives a response with `X-RateLimit-Limit: 50` and `X-RateLimit-Remaining: 0`. What does this indicate?

   • AThe client has made 50 requests and can make 50 more
   • BThe client has made 0 requests and can make 50 more
   • CThe client has been permanently blocked from the API
   • DThe client has used all 50 allowed requests in the current window
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