Cisco 300-910 Online Practice Questions and Exam Preparation

Cisco 300-910 Online Questions & Answers

• Question 11:

  Configuration changes to the production network devices are performed by a CI/CD pipeline. The code repository and the CI tool are running on separate servers. Some configuration changes are pushed to the code repository, but the pipeline did not start.

  Why did the pipeline fail to start?

  A. The CI server was not configured as a Git remote for the repository.
  B. The webhook call from the code repository did not reach the CI server.
  C. Configuration changes must be sent to the pipeline, which then updates the repository.
  D. The pipeline must be started manually after the code repository is updated.
  B. The webhook call from the code repository did not reach the CI server.

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  Explanation Explanation/Reference:A webhook is basically a callback URL that is triggered when certain events occur, such as a code commit. If the webhook call from the code repository does not reach the CI server, then the pipeline will not start. According to the Cisco Implementing DevOps Solutions and Practices using Cisco Platforms (DEVOPS) Study Manual, "A webhook is a web-based feature that enables a remote service to communicate with a local service, usually through a web server. Webhooks are used to trigger an action when a specific event occurs, usually in a remote service or application."

• Question 12:

  Refer to the exhibit.

  

  A docker-compose.yml file implements a postgres database container.

  Which .gitlab-ci.yml code block checks the health status of the container and stops the pipeline if the container is unhealthy?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  C. Option C

• Question 13:

  Which Kubernetes object is used to create a ClusterIP or NodePort?

  A. service
  B. pod
  C. deployment
  D. loadbalancer
  A. service

• Question 14:

  A DevOps engineer is supporting a containerized application with multiple components running across the Kubernetes cluster. Metrics from the container (CPU and memory) and application (requests per second and heap size) are being collected by Prometheus and displayed with Grafana. Users report transaction timeout problems with the application, but the metric graphs all look within normal levels.

  Which type of failure would prevent the engineer from seeing the problem using the captured metrics?

  A. Grafana has lost connectivity to Prometheus, which causes graphs to display only the cached data.
  B. CPU and memory metrics from Kubernetes nodes are not accurate due to the way that containers share resources.
  C. Some containers are crashing regularly and being restarted automatically by Kubernetes.
  D. The metricbeat agent has crashed and is no longer sending new data to Prometheus, so the metrics are not updating.
  D. The metricbeat agent has crashed and is no longer sending new data to Prometheus, so the metrics are not updating.

• Question 15:

  Refer to the exhibit.

  

  

  How should the Jenkins job be troubleshooted based on the error provided?

  A. Verify what the responding file created.
  B. Update pip.
  C. Install dependencies.
  D. Place the code in a container and run the job again.
  A. Verify what the responding file created.

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  Explanation Explanation/Reference:

• Question 16:

  An end user is seeing long web page load times on the internal business application that they are trying to view. The user is seeing this issue across multiple web browsers, and other users encounter the same issue. Which action should the system administrator take to start looking for the cause of this issue?

  A. Check to make sure Nginx is running.
  B. Check for response times in Nginx logs.
  C. Check to make sure the web API response is coming back in JSON.
  D. Check the size of the database that the application is using.
  B. Check for response times in Nginx logs.

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  Explanation Explanation/Reference:

• Question 17:

  An application has been designed based on microservices. The application is deployed on Kubernetes using multiple pods that share the same IP address. Each pod is responsible for a service in the application.

  Which command validates the success of the application deployment?

  A. kubectl get pods -o wide -w
  B. kubectl rollout status deployment
  C. kubectl describe pods/
  D. kubectl rollout history deployment
  B. kubectl rollout status deployment

• Question 18:

  A DevOps engineer has built a container to host a web-server and it must run as an executable. Which command must be configured in a Dockerfile to accomplish this goal?

  A. ENTRYPOINT
  B. ENTRYPOINT ["/usr/sbin/apache2ctl", "-D", "FOREGROUND"]
  C. ENTRYPOINT ["BACKGROUND", "-D", "/usr/sbin/apache2ctl"]
  D. ENTRYPOINT {usr/sbin/apache2ctl}
  B. ENTRYPOINT ["/usr/sbin/apache2ctl", "-D", "FOREGROUND"]

• Question 19:

  DRAG DROP

  An application is being built to collect and display telemetry streaming data. Drag and drop the elements of this stack from the left onto the correct functions on the right.

  Select and Place:

  

  

• Question 20:

  Refer to the exhibit.

  

  A developer needs to scale the existing pods within the worked nodes. Which object should be edited to achieve this goal?

  A. ReplicaSet
  B. PriorityClass
  C. Deployment
  D. Pod
  A. ReplicaSet