200-901 practice questions 221–230

1. Question 221 · 530 in bank

   Select 2

   What are two benefits of implementing common data structures when working with APIs in remote systems? (Choose two.)

   • Aensures that developers are limited to using one data schema type
   • Bprevents multivendor interoperability
   • Cimproves security in RESTful web services
   • Denforces standardized data structures
   • Eleverages code that is easily managed and reused

   Show answer

   Answer: DE

   Explanation

   Implementing common data structures when working with APIs in remote systems has several benefits. One benefit is that it enforces standardized data structures, which helps to ensure that data is consistently organized and easy to parse. This can make it easier for developers to work with the API and understand the data being returned. Another benefit of using common data structures is that it leverages code that is easily managed and reused. This can save time and resources, as developers do not have to spend as much time writing and debugging code. It can also improve the overall quality and reliability of the API, as the code is more likely to have been thoroughly tested and debugged.

   Source: Adapted from community discussion — mellohello

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2. Question 222 · 530 in bank

   A development team is creating an application used for contactless payments. The application must: • Be web-based • Capture and process the credit card information for a purchase. Which security action must the web application use to gather and process the private customer data?

   • AEnable RATs to monitor the web application remotely.
   • BDisable botnets to eliminate risks.
   • CDisable TLS to increase the connection speed.
   • DEnable the encryption of network traffic.

   Show answer

   Answer: D

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3. Question 223 · 530 in bank

   An engineer needs to collect information about 20,000 Bluetooth clients using the Cisco Meraki API. The API returns only 1,000 results. One of the HTTP response headers has the data: Link: https://api.meraki.com.info/api/v0/networks/ABC/bluetoothClients?perPage=1000&startingAfter=1000>;rel=“next” Which RFC is implemented by the API to apply the restriction?

   • ARFC 5988 – Web Linking
   • BRFC 5890 – Response Constraints
   • CRFC 5005 – Feed Paging and Archiving
   • DRFC 5446 – Content Limits

   Show answer

   Answer: A

   Explanation

   A. RFC 5988 – Web Linking The API implements the Web Linking, specified in the RFC 5988 which defines a mechanism for representing links in HTTP headers. This allows to provide a way to navigate through the data that is being returned by the API. The Link header returned in the API response is using the "next" relation that specifies the link to the next page of the results, this is a standard way of paginating the results, it is used by the API to return only a subset of the total data and provide a way to navigate through the pages. RFC 5890, RFC 5005, and RFC 5446 do not specify any mechanism related to pagination or data restriction in HTTP headers.

   Source: Adapted from community discussion — r0m

   References

   • RFC Editor
   • cisco.com documentation

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4. Question 224 · 530 in bank

   Select 2

   What are two benefits of using classes over functions when writing applications? (Choose two.)

   • Aimproved readability
   • Bincreased compatibility
   • Cvariable reusability
   • Dincreased performance
   • Ecode organization

   Show answer

   Answer: AE

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5. Question 225 · 530 in bank

   DRAG DROP - Drag and drop the steps from the left into order on the right to create a common CI/CD pipeline process. Not all options are used.

   

   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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6. Question 226 · 530 in bank

   DRAG DROP - Drag and drop the code from the bottom onto the box where the code is missing to obtain a list of network devices by using the Cisco Meraki API. Not all options are used.

   

   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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7. Question 227 · 530 in bank

   A developer creates a new application, but the application must be tested before being released to a customer. When a mobile phone that uses 4G is used to access the application, the request fails. Why does the connection to the application fail?

   • AThe application is hosted on premises and VPN connectivity is required
   • BThe application must be added to the production server before testing.
   • CThe application must be moved to the cloud before testing is possible.
   • DThe application connectivity is limited to HTTPS protocol.

   Show answer

   Answer: A

   Explanation

   Because a 4G phone is used, the phone is not in the same network as the application, so it needs a VPN connection to acces the application

   Source: Adapted from community discussion — rtg2123

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8. Question 228 · 530 in bank

   Select 2

   Which two encoding formats do YANG interfaces support? (Choose two.)

   • AXML
   • BJSON
   • CXHTML
   • DBER
   • Eplain text

   Show answer

   Answer: AB

   Explanation

   Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/171/b_171_programmability_cg/model_driven_telemetry.html

   Source: Adapted from community discussion — evilgoat

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9. Question 229 · 530 in bank

   Which platform has an API that has the capability to obtain a list of vulnerable software on user devices?

   • ACisco Advanced Malware Protection
   • BCisco Umbrella
   • CCisco Identity Services Engine
   • DCisco Firepower

   Show answer

   Answer: A

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10. Question 230 · 530 in bank

    A developer creates an application that must provide an encrypted connection or API keys. The keys will be used to communicate with a REST API. Which command must be used for the secure connection?

    • Acurl –X PUSH ‘http://username.app.com/endpoint/?api_key=12345abcdef’
    • Bcurl –v ‘ftp://username.app.com/endpoint/?api_key=12345abcdef’
    • Ccurl –X GET ‘https://username.app.com/endpoint/?api_key=12345abcdef’
    • Dcurl –X GET ‘http://username.app.com/endpoint/?api_key=12345abcdef’

    Show answer

    Answer: C

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200-901 practice, question 221. 530 questions available.