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Exam Developing Applications using Cisco Core Platforms and APIs (DEVCOR)
Number 350-901
File Name Developing Applications using Cisco Core Platforms and APIs (DEVCOR).selftesttraining.350-901.2020-03-25.1e.55q.vcex
Size 5.38 Mb
Posted March 25, 2020
Downloads 24



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Demo Questions

Question 1
A cloud native project is being worked on in which all source code and dependencies are written in Python, Ruby, and/or JavaScnpt. A change in code triggers a notification to the CI/CD tool to run the CI/CD pipeline. 
Which step should be omitted from the pipeline?

  • A: Deploy the code to one or more environments, such as staging and/or production.
  • B: Build one of more containers that package up code and all its dependencies.
  • C: Compile code.
  • D: Run automated tests to validate the correctness.



Question 2
Which two statements are considered best practices according to the 12-factor app methodology 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.



Question 3
An organization manages a large cloud-deployed application that employs a microservices architecture. No notable issues occur with downtime because the services of this application are redundantly deployed over three or more data center regions. However, several times a week reports are received about application slowness. The container orchestration logs show faults in a variety of containers that cause them to fail and then spin up brand new. 
Which action must be taken to improve the resiliency design of the application while maintaining 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.



Question 4
How should a web application be designed to work on a platform where up to 1000 requests per second can be served?

  • A: Use algorithms like random early detection to deny excessive requests.
  • B: Set a per-user limit (for example, 5 requests/minute/user) and deny the requests from the users who have reached the limit.
  • C: Only 1000 user connections are allowed; further connections are denied so that all connected users can be served.
  • D: All requests are saved and processed one by one so that all users can be served eventually.



Question 5
An organization manages a large cloud-deployed application that employs a microservices architecture across multiple data centers. Reports have received about application slowness. The container orchestration logs show that faults have been raised in a variety of containers that caused them to fail and then spin up brand new instances. 
Which two actions can improve the design of the application to identify the faults? (Choose two.)

  • A: Automatically pull out the container that fails the most over a time period.
  • B: Implement a tagging methodology that follows the application execution from service to service.
  • C: Add logging on exception and provide immediate notification.
  • D: Do a write to the datastore every time there is an application failure.
  • E: Implement an SNMP logging system with alerts in case a network link is slow.



Question 6
A network operations team is using the cloud to automate some of their managed customer and branch locations. They require that all of their tooling be ephemeral by design and that the entire automation environment can be recreated without manual commands. Automation code and configuration state will be stored in git for change control and versioning. The engineering high-level plan is to use VMs in a cloud-provider environment then configure open source tooling onto these VMs to poll, test, and configure the remote devices, as well as deploy the tooling itself. 
Which configuration management and/or automation tooling is needed for this solution?

  • A: Ansible
  • B: Ansible and Terraform
  • C: NSO
  • D: Terraform
  • E: Ansible and NSO



Question 7
An application is hosted on Google Kubernetes Engine. A new JavaScript module is created to work with the existing application. Which task is mandatory to make the code ready to deploy?

  • A: Create a Dockerfile for the code base.
  • B: Rewrite the code in Python.
  • C: Build a wrapper for the code to “containerize” it.
  • D: Rebase the code from the upstream git repo.



Question 8
Where should distributed load balancing occur in a horizontally scalable architecture?

  • A: firewall-side/policy load balancing
  • B: network-side/central load balancing
  • C: service-side/remote load balancing
  • D: client-side/local load balancing



Question 9
Which two statements about a stateless application are true? (Choose two.)

  • A: Different requests can be processed by different servers.
  • B: Requests are based only on information relayed with each request.
  • C: Information about earlier requests must be kept and must be accessible.
  • D: The same server must be used to process all requests that are linked to the same state.
  • E: No state information can be shared across servers.



Question 10
Which statement about microservices architecture is true?

  • A: Applications are written in a single unit.
  • B: It is a complex application composed of multiple independent parts.
  • C: It is often a challenge to scale individual parts.
  • D: A single faulty service can bring the whole application down.








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