200-901 practice questions 501–510

1. Question 501 · 530 in bank

   Which Cisco DevNet resource allows access to products in a development lab to explore, learn, and build applications that use Cisco APIs?

   • ADevNet Code Exchange
   • BDevNet Sandbox
   • CDevNet Communities
   • DDevNet Automation Exchange

   Show answer

   Answer: B

   Explanation

   Reference: https://developer.cisco.com/site/sandbox/

   References

   • cisco.com documentation

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2. Question 502 · 530 in bank

   Refer to the exhibits.

   

   

   A developer is troubleshooting an API with the given API documentation and cURL command. What is the cause of this problem?

   • AThe authorization header is missing or incomplete.
   • BThe request body is missing or incomplete.
   • CThe API token specified is expired.
   • DThe user is not allowed to post messages from their account.

   Show answer

   Answer: A

   Explanation

   C. is correct. Access token has validity of only 12 hours. I tried using an expired token and got 401. { "errors": [ { "description": "The request requires a valid access token set in the Authorization request header." } ], "message": "The request requires a valid access token set in the Authorization request header.", "trackingId": "ROUTER_6011BD76-C99C-01BB-5AFD-AC12F8F25AFD" } 401

   Source: Adapted from community discussion — JimGrayham

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3. Question 503 · 530 in bank

   Select 2

   Which two statements describe the traits of an asynchronous API call? (Choose two.)

   • ACode execution blocks or waits for the call to an API to return.
   • BA callback function typically is used to process the response from an API call.
   • CA call to an API does not block the code, but rather it allows application processing to continue.
   • DThe end user can experience latency or performance lag while waiting for the API call to return.
   • EThe order in which API calls return can be guaranteed.

   Show answer

   Answer: BC

   Explanation

   BC are correct: Asynchronous calls do not block (or wait) for the API call to return from the server. Execution continues on in your program, and when the call returns from the server, a “callback” function is executed.

   Source: Adapted from community discussion — blinksink

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4. Question 504 · 530 in bank

   Which mechanism is used to consume a RESTful API design when large amounts of data are returned?

   • Adata sets
   • Bscrolling
   • Cpagination
   • Dblobs

   Show answer

   Answer: C

   Explanation

   Reference: https://nordicapis.com/everything-you-need-to-know-about-api-pagination/

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5. Question 505 · 530 in bank

   Refer to the exhibit.

   

   What caused the error in this API request?

   • AThe API resource does not support the POST operation.
   • BThe submitted JSON payload has a formatting issue.
   • CThe API resource does not support JSON format payloads.
   • DThe submitted JSON payload includes a field that is not supported by the API resource.

   Show answer

   Answer: B

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6. Question 506 · 530 in bank

   Select 2

   Which two use cases are supported by Meraki APIs? (Choose two.)

   • ABuild location-aware apps from Wi-Fi and LoRaWAN devices.
   • BBuild a custom Captive Portal for Mobile Apps.
   • CConfigure network devices via the Dashboard API.
   • DDeploy applications onto the devices.
   • ERetrieve live streams from a Meraki Camera.

   Show answer

   Answer: CE

   Explanation

   B&C are the correct answers. Take a look at the DevNet programmability basic videos, https://developer.cisco.com/video/net-prog-basics/ There are 3 main functions that meraki API provides: Dashboard API, Scanning API and Captive Portal API

   Source: Adapted from community discussion — Leonhrz

   References

   • cisco.com documentation
   • cisco.com documentation
   • cisco.com documentation
   • cisco.com documentation

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7. Question 507 · 530 in bank

   Which API is used to obtain data about voicemail ports?

   • AWebex Teams
   • BCisco Unified Communications Manager
   • CFinesse Gadgets
   • DWebex Devices

   Show answer

   Answer: B

   Explanation

   B is correct: Cisco Unified Communications Manager (CUCM) provides API access to data management, call management, and voicemail integration. Source: Cisco DevNet Fundamental Course: https://developer.cisco.com/certification/fundamentals/

   Source: Adapted from community discussion — daniaprincipal

   References

   • cisco.com documentation
   • cisco.com documentation
   • cisco.com documentation

   Next question

8. Question 508 · 530 in bank

   DRAG DROP -

   

   Refer to the exhibit. A developer needs to automatically retrieve all of the messages of a Webex room with the roomId of `Y2lzY29zcGFyazovL3Vz397468502YjU5NjAtNTk0Zi0xMWVhLTk0Mj`. Using the Webex API documentation shown, drag and drop the code snippets from below onto the code to complete the Python script to list all of the messages in the room. Not all options are used. Select and Place:

   

   This is an interactive task on the real exam — a drag-and-drop, hotspot or ordering question. There is nothing to select here, so the answer is shown below for reference.

   Show the answer figure

   Answer: See figure below

   

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9. Question 509 · 530 in bank

   Select 2

   What are two advantages of version control software? (Choose two.)

   • AIt supports tracking and comparison of changes in binary format files.
   • BIt allows new team members to access the current code and history.
   • CIt supports comparisons between revisions of source code files.
   • DIt provides wiki collaboration software for documentation.
   • EIt allows old versions of packaged applications to be hosted on the Internet.

   Show answer

   Answer: BC

   Explanation

   its not possible to track changes in binary files, binary files are stored in entirety. on text files, version control tracking is possible

   Source: Adapted from community discussion — ananbini0035

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10. Question 510 · 530 in bank

    What is a difference between a synchronous API and an asynchronous API?

    • ASynchronous API calls require an authentication header to be sent while asynchronous calls do not require authentication.
    • BSynchronous API calls are returned immediately while asynchronous calls do not guarantee an immediate response.
    • CAn asynchronous API can make offline calls while synchronous APIs do not have this capability.
    • DAn asynchronous API can make a larger number of calls in a specified time period than a synchronous API.

    Show answer

    Answer: B

    Explanation

    B is not correct Synchronous API calls are blocking calls that do not return until either the change has been completed or there has been an error. For asynchronous calls, the response to the API call is returned immediately with a polling URL while the request continues to be processed. In heavier load conditions, it can be more efficient to submit multiple async calls and periodically check the status than to wait for each call to complete before submitting the next one.

    Source: Adapted from community discussion — arthurb

    References

    • cisco.com documentation

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200-901 practice, question 501. 530 questions available.