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Cisco Certified DevNet Professional
300-910
Implementing DevOps Solutions and Practices using Cisco Platforms (DEVOPS) Questions and Answers

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Questions # 1:

Question # 1

Refer to the exhibit A DevOps engineer must deploy two microservices The deployment must be installed in a new Kubernetes cluster. The microservices currently run in Docker and are managed by using the provided docker-compose yml file Drag and drop the steps from the left into order on the right to successfully deploy the microservices

Question # 1

Options:

Answer

Answer:

Explanation

Step 1 – create a persistent volume claim to bund a volume to a pod.

Step 2 – create a persistent volume for the database.

Step 3 – create a deployment to run the database image.

Step 4 – create a service to expose the database port

Step 5 – create deployment to run the microservices 1 and microservices 2 images

Step 6 – create a service to expose the MS1 and MS2 ports

Questions # 2:

A team is developing an application for end users. The application will use microservices. For user access, dual-factor authentication will be used. Which type of test must be performed by the CI/CD tool to replicate user behavior and to verity that various user actions work as expected?

Options:

Unit

End-to-end

A/B

sanity

Answer

Questions # 3:

An application communicates with multiple third-party services that use API keys When stress testing the system, developers must change the URLs of the third-party services The application must run on port 5000. but the developers must be able to change the port at runtime if required Which configuration management approach simplifies the development workflow and reduces the configuration changes?

Options:

secrets

sane defaults

application parameters

config maps

Answer

Questions # 4:

A new banking application is being developed as the main currency exchange resource for all the customers on a global scale. The application must comply with the security based on the deployed region. Therefore, the CI/CD pipeline must be created with the highest security possible.

Which approach accomplishes this goal?

Options:

Give the accounts used in the CI/CD pipeline full administrative rights to all applications

Use the same passwords across the entire CI/CD pipeline

Ensure that secrets are not inadvertently passed on during builds for pull requests via CI/CD pipeline

Never use one-time passwords in CI/CD pipeline

Answer

Questions # 5:

A user wants to deploy a new service to a Kubernetes cluster. Which two commands accomplish this goal? (Choose two.)

Options:

Apply

Install

Deploy

Create

Expose

Answer

A, E

Questions # 6:

A team must roll out updates on the production instance of an application. To avoid any service down time, the new version must be released alongside the old version. After the team ensures that the new version operates as it should, traffic will be redirected to the new version. Then the old version will be shut down.

Which deployment strategy must be used?

Options:

rolling

blue/green

shadow

canary

Answer

Explanation

The new version of the application is deployed to one of the environments, and then traffic is gradually shifted to the updated environment. This strategy allows the team to test the new version before releasing it to the public, ensuring that it is operating as expected. After the new version is tested and approved, traffic is fully shifted to the new environment and the old environment is shut down.

Questions # 7:

A developer has created a deployment that should launch a pod to run their database service. The pod should launch with a metadata name of “Cisco-DB," and the developer has added it to the "Cisco" namespace in their deployment.

Which Kubernetes command confirms that the service is running and usable?

Options:

kubectl -n Cisco get services | grep “Cisco-DB”

kubectl -n Cisco get pods | grep “Cisco-DB”

kubectl get pods | grep “Cisco-DB”

kubectl -n Cisco get service | grep “Cisco-DB”

Answer

Explanation

The correct answer is B. kubectl -n Cisco get pods | grep "Cisco-DB". This command allows you to view the pods in the Cisco namespace and filter the list for the pod named "Cisco-DB". This will confirm that the pod is running and usable.

References: Cisco Implementing DevOps Solutions and Practices using Cisco Platforms (DEVOPS) Study Manual, Chapter 6, Section 6.3: Kubernetes Commands, Page 113.

Questions # 8:

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?

Options:

ENTRYPOINT

ENTRYPOINT [“/usr/sbin/apache2ctl”, “-D”, “FOREGROUND”]

ENTRYPOINT [“BACKGROUND”, “-D”, “/usr/sbin/apache2ctl”]

ENTRYPOINT {usr/sbin/apache2ctl}

Answer

Questions # 9:

Question # 9

Refer to the exhibit A DevOps engineer is responsible for monitoring a mission-critical app During normal operations, when opening the application dashboard, it has been noticed that Ecom-Tier1 suddenly turns partially red Which action must be taken to address the Ecom-Tier1 turning red?

Options:

Restart the service to re-establish the connection with the nodes and clear the path.

Decrease the load on the MySQL databases to release the hardware resources available for node distribution

Check with the planning team to understand if the number of nodes in the Ecom tier can be increased to handle traffic

Contact the network team to investigate the network path that caused this intermittent issue around 9.10.

Answer

Questions # 10:

A developer is creating an application where each service uses a different operating system. The application components need to be isolated but must have the ability to communicate with each other.

Drag and drop the entries from the left into the order on the right to create a Dockerfile that will accomplish this goal.

Question # 10