| Exam Code | 350-901 |
| Exam Name | Developing Applications using Cisco Core Platforms and APIs (DEVCOR) |
| Questions | 434 Questions Answers With Explanation |
| Update Date | July 16,2026 |
| Price |
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What is a benefit of implementing a Cl pipeline?
A. enforces version control
B. enables a faster feedback loop
C. ensures that tests are written before code is written
D. decreases external dependencies
Which configuration stop must be performed on a Cisco IOS XE device to present collecteddata in Cisco DNA Center?
A. Create an SNMPv3 user account.
B. Apply a telemetry profile.
C. Synchronize the device and the data collector.
D. Enable Cisco NetFlow collection.
A team of developers created their own CA and started signing certificates for all of theirloT devices, Which action will make the browseraccept these certificates?
A. Set the private keys 1024-bit RSA.
B. Preload the developer CA on the trusted CA list of the browser.
C. Enable HTTPS or port 443 on the browser.
D. install a TLS instead of SSL certificate on the loT devices.
What is a benefit of continuous testing?
A. decreases the frequency of code check-ins
B. removes the requirement for test environments
C. enables parallel testing
D. increases the number of bugs found in production
A developer has created an application based on customer requirements. The customerneeds to run the application with the minimum downtime. Which design approach regardinghigh-availability applications, Recovery Time Objective, and Recovery Point Objective mustbe taken?
A. Active/passive results in lower RTO and RPO. For RPO, data synchronization betweenthe two data centers must be timely to allow seamless request flow.
B. Active/passive results in lower RTO and RPO. For RPO, data synchronization betweenthe two data centers does not need to be timely to allow seamless request flow.
C. Active/active results in lower RTO and RPO. For RPO, data synchronization betweenthe two data centers does not need to be timely to allow seamless request flow.
D. Active/active results in lower RTO and RPO. For RPO, data synchronization betweenthe two data centers must be timely to allow seamless request flow.
An application is developed in order to communicate with Cisco Webex. For reporting, theapplication must retrieve all the messages sent to a Cisco Webex room on a monthly basis.Which action calls /v1/messages directly?
A. Set up a webhook that has messages as the resource type and store the results locally.
B. Utilize the pagination functionality by defining the max property.
C. Recursively call the /vl/messages endpoint by using the beforeMessage property.
D. Filter the response results by specifying the created property in the request.
What is the unique identifier in the 0Auth2 three-legged authorization code flow?
A. client ID
B. resource server
C. resource owner
D. authorization server
Which transport layer protocol does gRPC use to retrieve telemetry information?
A. SSH
B. SNMP
C. TCP
D. HTTP/2
Which two statements are considered best practices according to the 12-factor appmethodology for application design? (Choose two.)
A. Application code writes its event stream to stdout.
B. Application log streams are archived in multiple replicated databases.
C. Application log streams are sent to log indexing and analysis systems.
D. Application code writes its event stream to specific log files.
E. Log files are aggregated into a single file on individual nodes.
A container running a Python script is failing when it reaches the integration testing phaseof the CI/CD process. The code has been reviewed thoroughly and the build process workson this container and all other containers pass unit and integration testing.What should be verified to resolve the issue?
A. that the correct port is exposed in the Dockerfile
B. that the necessary modules and packages are installed on build
C. that the script is running from the right directory
D. that the Python version of the container image is correct
Refer to the exhibit , The command docker build -tag=friendlyhello . is run to build a dockerimage from the given Dockerfile,requirements,txt, and app.py, Then the command docker run -p 4000:80 friendlyhello isexecuted to run the application. Which URL is entered in the web browser to see thecontent served by the application?
A. http://localhost:4000
B. http ://localhost:80
C. http ://127.0.0.1:80
D. http:///4000:80
A developer has issued git add file1 and file2 test.py command to add the three files for thenext commit, but then decides to executed test.py from this command. Which commandneeds to be used to exclude test.py from this commit but keep the rest of the files?
A. git clean — test.py
B. git reset - test py
C. git checkout - file1 file2
D. git stash -- file1 file 2
AppGigabitEthernet interface is used as data port for a container on a Cisco Catalyst 9000Series Switch. Which two interface configuration options should be used? (Choose two.)
A. trunk interface
B. bridged virtual interface
C. SPAN port
D. management interface
E. subinterface
Which two situations are flagged by software tools designed for dependency checking incontinuous integration environments, such as OWASP? (Choose two.)
A. publicly disclosed vulnerabilities related to the included dependencies
B. mismatches in coding styles and conventions in the included dependencies
C. incompatible licenses in the included dependencies
D. test case failures introduced by bugs in the included dependencies
E. buffer overflows to occur as the result of a combination of the included dependencies
A custom dashboard of the network health must be created by using Cisco DNA CenterAPIs An existing dashboard is a RESTful API that receives data from Cisco DNA Center asa new metric every time the network health information is sent from the script to thedashboard Which set of requests creates the custom dashboard?
A. PUT request to Cisco DNA Center to obtain the network health information and then aPOST request to the dashboard to publish the new metric
B. POST request to Cisco DNA Center to obtain the network health information and then aGET request to the dashboard to publish the new metric
C. GET request to Cisco DNA Center to obtain the network health information and then aPUT request to the dashboard to publish the new metric
D. GET request to Cisco DNA Center to obtain the network health information and then aPOST request to the dashboard to publish the new metric
A developer deploys a web application in a local data center that is now experiencing hightraffic load from users accessing data through REST API calls. Which approach enhancesthe responsiveness and performance of the API?
A. Use HTTP POST or other non-read methods for read requests when possible
B. Ensure that all read requests are clearly identified by the PUT method
C. Configure API payload to return errors in HTTP 200 responses
D. Use HTTP standard authorization header to submit authentication credentials
When end-to-end encryption is implemented, which area is most vulnerable to exploitation?
A. cryptographic key exchange
B. endpoint security
C. cryptographic key generation
D. security of data in transit
How does the use of release packaging allow dependencies to be effectively managedduring deployments?
A. dependencies are staggered between multiple releases
B. designed to prevent any dependencies between release units
C. dependencies are tested after the release is deployed
D. removal of release units if they have issues in testing
What is the gRPC Network Management Interface protocol?
A. a unified management protocol for streaming telemetry and database logging
B. a configuration management protocol for monitoring
C. a protocol for configuration management and streaming telemetry
D. a logging protocol used across database servers
A developer in a learn of distributed authors is working on code in an isolated Git branchnamed 'update4a2f5464771 The developer attempts to merge the new code with a branchnamed ’dvcapp2a3f1564733' however the merge operation encounters a conflict errorduring the process. Which Git command must the developer use to exit from the mergeprocess and return the branch to the previous state?
A. git merge -exit
B. git merge -abort
C. git abort —merge
D. git abort -status
Which database type should be used to store data received from model-driven telemetry?
A. BigQuery database
B. Time series database
C. NoSQL database
D. PostgreSQL database
An organization manages a large cloud-deployed application that employs a microservicesarchitecture. No notable issues occur with downtime because the services of thisapplication are redundantly deployed over three or more data center regions. However,several times a week reports are received about application slowness. The containerorchestration logs show faults in a variety of containers that cause them to fail and thenspin up brand new.Which action must be taken to improve the resiliency design of the application whilemaintaining current scale?
A. Update the base image of the containers.
B. Test the execution of the application with another cloud services platform.
C. Increase the number of containers running per service.
D. Add consistent “try/catch(exception)” clauses to the code.
When an application is designed that requires high availability, what is a reason to use a cross-region cloud?
A. Provide disaster recovery protection
B. Protect from a single component failure
C. Minimize costs
D. Account for failure in another zone
What are two features of On-Box Python for hosting an application on a network device? (Choose two.)
A. It has direct access to Cisco IOS XE CLI commands.
B. It is a Python interpreter installed inside the guest shell.
C. It enables execution of XML scripts on a Cisco IOS XE router or switch.
D. It supports Qt for graphical interfaces and dashboards.
E. It has access to Cisco IOS XE web UI through a controller.
Which function does Fluentd fulfill for application logging in Kubernetes?
A. logging agent for distribution
B. backend time series database storage
C. monitoring and log visualization
D. messaging queueig infrastructure
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