350-901 practice questions 171–180

1. Question 171 · 385 in bank

   Select 2

   

   Refer to the exhibit. An application hosting server in the local data center is experiencing large amounts of traffic from end-users. A developer must optimize this API server to reduce the load on its host. What are two ways to optimize this code through HTTP cache controls? (Choose two.)

   • AInclude the “Content-Type” header in the API response.
   • BInclude the “Last-Modified” header in the API response.
   • CInclude the “ETag” header in the API response.
   • DLeverage middleware caching and respond with HTTP code 204 in the API response.
   • ELeverage middleware caching and respond with HTTP code 104 in the API response.

   Show answer

   Answer: BC

   Explanation

   I would go for B and C. B and C are the answers because these headers allow the API server to send cached versions of responses in the event that the content of the response has not changed since the last time it was requested. This reduces the load on the server by avoiding the need to recreate the response for every request.

   Source: Adapted from community discussion — lznlxl

   Next question

2. Question 172 · 385 in bank

   A developer creates an application for a Cisco Catalyst 9000 switch in a Docker container. Which action must be taken to host the application on the switch?

   • AExport the application as a TAR file and import the file to the switch.
   • BConnect the switch to Cisco DNA Center and push the application through the platform.
   • CUse the Cisco IOxClient tool to export the application to a ZIP file and push the file to the switch.
   • DCopy the application code to a NETCONF file and upload the file to the switch.

   Show answer

   Answer: A

   Explanation

   Correct answer is A: Create docker and import to a tar file: https://developer.cisco.com/docs/app-hosting/#!docker-applications-development/tutorial-build-sample-docker-python-simple-app Install a tar file after import to Switch flash: https://developer.cisco.com/docs/app-hosting/#!getting-started-with-docker-applications-deployment/install-activate-and-start-app

   Source: Adapted from community discussion — vrossa

   References

   • cisco.com documentation

   Next question

3. Question 173 · 385 in bank

   DRAG DROP - Drag and drop the code from the bottom onto the box where the code is missing to retrieve location data for network devices. 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

   

   Next question

4. Question 174 · 385 in bank

   DRAG DROP - Drag and drop the application requirement on the left onto the database type that should be selected for the requirement on the right. 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

   Explanation

   Incorrect it should be Relational: - Higly normalized data - Structured query language - Enforced data integrity tools Nonrelation: - elastic - horizontal - rapid

   Source: Adapted from community discussion — lente_kriebels

   

   Next question

5. Question 175 · 385 in bank

   Select 2

   

   Refer to the exhibit. A developer has created a Python script that retrieves information about the deployment of Cisco wireless access points using REST API. Which two code snippets must be added to the blank in the code to print the value of the userId key instead of printing the full JSON response? (Choose two.)

   • Afor key, value in json.items(): if key == ‘userId’: print('{}'.format(value))
   • Bfor key, value in json.dumps(response.text): if key in ‘userId’: print value
   • Cprint json[0][userId]
   • Dprint json[‘userId’]
   • Eprint json[1][‘userId’]

   Show answer

   Answer: AD

   Explanation

   It's AD, I tried this in a Python interpreter and it worked. However, note that the syntax in D is incorrect for Python3, it should be: print(json['userId'])

   Source: Adapted from community discussion — kirrim

   Next question

6. Question 176 · 385 in bank

   Select 2

   An enterprise refactors its monolithic application into a modern cloud-native application that is based on microservices. A key requirement of the application design is to ensure that the IT team is aware of performance issues or bottlenecks in the new application. Which two approaches must be part of the design considerations? (Choose two.)

   • AAdopt a service-oriented architecture to handle communication between the services that make up the application.
   • BImplement infrastructure monitoring to ensure that pipeline components interoperate smoothly and reliably.
   • CInstrument the application code to gather telemetry data from logs, metrics, or tracing.
   • DPeriodically scale up the resources of the host machines when the application starts to experience high loads.
   • EDeploy infrastructure monitoring agents into the operating system of the host machines.

   Show answer

   Answer: BC

   Explanation

   I like B and C since the question refers to cloud-oriented applications using microservices, so I don't think it would related to host machines/operating systems at all

   Source: Adapted from community discussion — ThePokemonNuzlockingMaster

   Next question

7. Question 177 · 385 in bank

   A developer deploys a web application in a local data center that is now experiencing high traffic load from users accessing data through REST API calls. Which approach enhances the responsiveness and performance of the API?

   • AEnsure that all read requests are clearly identified by the PUT method.
   • BConfigure API payload to return errors in HTTP 200 responses.
   • CUse HTTP POST or other non-read methods for read requests when possible.
   • DUse HTTP standard authorization header to submit authentication credentials.

   Show answer

   Answer: D

   Explanation

   A, B, and C are obviously sub-optimal practices and should be avoided. D is the only proper answer left, just by the process of elimination alone. D is helpful for scalability and performance, because if you're using a standard HTTP authorization header, you can deploy authentication and authorization offloading techniques through an API gateway. This will reduce the load on your back-end API services since they don't have to handle that piece anymore.

   Source: Adapted from community discussion — kirrim

   Next question

8. Question 178 · 385 in bank

   Select 2

   

   Refer to the exhibit. One part of an application routinely uses the Cisco Meraki API to collate data about all clients. Other parts of the application also use the Meraki API, but a single API key is used within the application. The organization has approximately 4,000 clients across 30 networks. Some of the application users report poor performance and missing data. Which two changes improve the performance of the application? (Choose two.)

   • ACheck API response payloads for later reuse in real time during code execution.
   • BUse random values in the User-Agent header when HTTP calls are made.
   • CUse fewer API calls to create a more efficient endpoint.
   • DConfigure multiple API keys in the application and rotate usage of each one.
   • ECheck for HTTP code 429 and wait until Retry-After time before further calls are made.

   Show answer

   Answer: CE

   Explanation

   C. Use fewer API calls to create a more efficient endpoint. E. Check for HTTP code 429 and wait until Retry-After time before further calls are made. To improve the performance of the application, two possible changes are: 1. Use fewer API calls to create a more efficient endpoint. This would reduce the number of requests sent to the Meraki API and reduce the load on the server. Check for HTTP code 429 and wait until Retry-After time before further calls are made. The 2. HTTP code 429 indicates that the API rate limit has been exceeded, and the Retry-After header indicates the number of seconds to wait before making another request. Implementing this check would help avoid unnecessary errors and prevent the application from overloading the Meraki API.

   Source: Adapted from community discussion — [Removed]

   References

   • cisco.com documentation

   Next question

9. Question 179 · 385 in bank

   DRAG DROP - Drag and drop the code from the bottom onto the box where the code is missing to deploy three Cisco UCS servers, each from a different template. 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

   Explanation

   You know it's a POST, not GET, because you're crafting and sending a payload. For the payload XML header name, this code snippet is almost directly word for word from the documentation here: https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/ucs-central/api/b_UCSC_XML_API_book/b_UCSC_XML_API_book_chapter_011.html#id_32323 Answer: requests lsInstantiateNNamedTemplate /lsInstantiateNNamedTemplate POST

   Source: Adapted from community discussion — kirrim

   References

   • Cisco documentation

   

   Next question

10. Question 180 · 385 in bank

    What is a characteristic of event-driven architecture?

    • Aseparates the models for the reading and writing of data
    • Bbreaks a solution into parts according to business capability
    • Callows for loose coupling between software components
    • Dprovides a single point of reference for mastering data

    Show answer

    Answer: C

    Next question

Keyboard:J Kmove between questionsA–Dselect an answerRshow or hide the answer← →change page

350-901 practice, question 171. 385 questions available.