PCA practice questions 31–40

1. Question 31 · 335 in bank

   Your team will start developing a new application using microservices architecture on Kubernetes Engine. As part of the development lifecycle, any code change that has been pushed to the remote develop branch on your GitHub repository should be built and tested automatically. When the build and test are successful, the relevant microservice will be deployed automatically in the development environment. You want to ensure that all code deployed in the development environment follows this process. What should you do?

   • AHave each developer install a pre-commit hook on their workstation that tests the code and builds the container when committing on the development branch. After a successful commit, have the developer deploy the newly built container image on the development cluster.
   • BInstall a post-commit hook on the remote git repository that tests the code and builds the container when code is pushed to the development branch. After a successful commit, have the developer deploy the newly built container image on the development cluster.
   • CCreate a Cloud Build trigger based on the development branch that tests the code, builds the container, and stores it in Container Registry. Create a deployment pipeline that watches for new images and deploys the new image on the development cluster. Ensure only the deployment tool has access to deploy new versions.
   • DCreate a Cloud Build trigger based on the development branch to build a new container image and store it in Container Registry. Rely on Vulnerability Scanning to ensure the code tests succeed. As the final step of the Cloud Build process, deploy the new container image on the development cluster. Ensure only Cloud Build has access to deploy new versions.

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   Answer: C

   Explanation

   Questions say "relevant microservice will be deployed automatically in the development environment." Therefore A and B are out. D says "Rely on Vulnerability Scanning to ensure the code tests succeed." Vulnerability Scanning is not test so D is out. The correct Answer is therefore C.

   Source: Adapted from community discussion — AdGlad

   References

   • Google Cloud documentation
   • developers.google.com documentation
   • Google Cloud documentation

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2. Question 32 · 335 in bank

   Your operations team has asked you to help diagnose a performance issue in a production application that runs on Compute Engine. The application is dropping requests that reach it when under heavy load. The process list for affected instances shows a single application process that is consuming all available CPU, and autoscaling has reached the upper limit of instances. There is no abnormal load on any other related systems, including the database. You want to allow production traffic to be served again as quickly as possible. Which action should you recommend?

   • AChange the autoscaling metric to agent.googleapis.com/memory/percent_used.
   • BRestart the affected instances on a staggered schedule.
   • CSSH to each instance and restart the application process.
   • DIncrease the maximum number of instances in the autoscaling group.

   Show answer

   Answer: D

   Explanation

   I choose for A, but D is the best choice. The trick is: "process that is consuming all available CPU" and "autoscaling has reached the upper limit of instances" If the process is consuming all available CPU, we need to reconfigure our metrics for best tresholds (Option A) AND if the autoscaling reached the upper limit of instances, so we need to increase this limit (Option D), BUT, after reached the upper limit of instances, it doesn't matter the tresholds, the process will consume all resources that have available. So, option D is the best option.

   Source: Adapted from community discussion — grejao

   References

   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation

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3. Question 33 · 335 in bank

   You are implementing the infrastructure for a web service on Google Cloud. The web service needs to receive and store the data from 500,000 requests per second. The data will be queried later in real time, based on exact matches of a known set of attributes. There will be periods where the web service will not receive any requests. The business wants to keep costs low. Which web service platform and database should you use for the application?

   • ACloud Run and BigQuery
   • BCloud Run and Cloud Bigtable
   • CA Compute Engine autoscaling managed instance group and BigQuery
   • DA Compute Engine autoscaling managed instance group and Cloud Bigtable

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   Answer: B

   Explanation

   Any correct answer must involve Cloud Bigtable over BigQuery since Bigtable is optimized for heavy write loads. That leaves B and D. I would suggest B b/c it is lower cost ("The business wants to keep costs low")

   Source: Adapted from community discussion — Enzian

   References

   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation

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4. Question 34 · 335 in bank

   You are developing an application using different microservices that should remain internal to the cluster. You want to be able to configure each microservice with a specific number of replicas. You also want to be able to address a specific microservice from any other microservice in a uniform way, regardless of the number of replicas the microservice scales to. You need to implement this solution on Google Kubernetes Engine. What should you do?

   • ADeploy each microservice as a Deployment. Expose the Deployment in the cluster using a Service, and use the Service DNS name to address it from other microservices within the cluster.
   • BDeploy each microservice as a Deployment. Expose the Deployment in the cluster using an Ingress, and use the Ingress IP address to address the Deployment from other microservices within the cluster.
   • CDeploy each microservice as a Pod. Expose the Pod in the cluster using a Service, and use the Service DNS name to address the microservice from other microservices within the cluster.
   • DDeploy each microservice as a Pod. Expose the Pod in the cluster using an Ingress, and use the Ingress IP address name to address the Pod from other microservices within the cluster.

   Show answer

   Answer: A

   Explanation

   Answer is A 100% B is incorrect. Ingress comes with a HTTP(S) LB with external IP hence is not needed for communications within the cluster internally.

   Source: Adapted from community discussion — PeppaPig

   References

   • Kubernetes documentation

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5. Question 35 · 335 in bank

   Your customer is receiving reports that their recently updated Google App Engine application is taking approximately 30 seconds to load for some of their users. This behavior was not reported before the update. What strategy should you take?

   • AWork with your ISP to diagnose the problem
   • BOpen a support ticket to ask for network capture and flow data to diagnose the problem, then roll back your application
   • CRoll back to an earlier known good release initially, then use Stackdriver Trace and Logging to diagnose the problem in a development/test/staging environment
   • DRoll back to an earlier known good release, then push the release again at a quieter period to investigate. Then use Stackdriver Trace and Logging to diagnose the problem

   Show answer

   Answer: C

   Explanation

   Key word: This behavior was not reported before the update A - Not Correct as it was working before with same ISP B - New code update caused an issue- why to open support ticket C - I agree with C D - This requires downtime and live prod affected too

   Source: Adapted from community discussion — MyPractice

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6. Question 36 · 335 in bank

   Your company has a networking team and a development team. The development team runs applications on Compute Engine instances that contain sensitive data. The development team requires administrative permissions for Compute Engine. Your company requires all network resources to be managed by the networking team. The development team does not want the networking team to have access to the sensitive data on the instances. What should you do?

   • A1. Create a project with a standalone VPC and assign the Network Admin role to the networking team. 2. Create a second project with a standalone VPC and assign the Compute Admin role to the development team. 3. Use Cloud VPN to join the two VPCs.
   • B1. Create a project with a standalone Virtual Private Cloud (VPC), assign the Network Admin role to the networking team, and assign the Compute Admin role to the development team.
   • C1. Create a project with a Shared VPC and assign the Network Admin role to the networking team. 2. Create a second project without a VPC, configure it as a Shared VPC service project, and assign the Compute Admin role to the development team.
   • D1. Create a project with a standalone VPC and assign the Network Admin role to the networking team. 2. Create a second project with a standalone VPC and assign the Compute Admin role to the development team. 3. Use VPC Peering to join the two VPCs.

   Show answer

   Answer: C

   Explanation

   C. 1. Create a project with a Shared VPC and assign the Network Admin role to the networking team. 2. Create a second project without a VPC, configure it as a Shared VPC service project, and assign the Compute Admin role to the development team.

   Source: Adapted from community discussion — victory108

   References

   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation

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7. Question 37 · 335 in bank

   Your company wants you to build a highly reliable web application with a few public APIs as the backend. You don't expect a lot of user traffic, but traffic could spike occasionally. You want to leverage Cloud Load Balancing, and the solution must be cost-effective for users. What should you do?

   • AStore static content such as HTML and images in Cloud CDN. Host the APIs on App Engine and store the user data in Cloud SQL.
   • BStore static content such as HTML and images in a Cloud Storage bucket. Host the APIs on a zonal Google Kubernetes Engine cluster with worker nodes in multiple zones, and save the user data in Cloud Spanner.
   • CStore static content such as HTML and images in Cloud CDN. Use Cloud Run to host the APIs and save the user data in Cloud SQL.
   • DStore static content such as HTML and images in a Cloud Storage bucket. Use Cloud Functions to host the APIs and save the user data in Firestore.

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   Answer: D

   Explanation

   IMHO it is d), not b). Reason is that you don't need Cloud Spanner just to store user data - FireStore is the better solution. Additionally, I see no indications concerning the requirement to use GKE... Please correct me when I am wrong.

   Source: Adapted from community discussion — XDevX

   References

   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation

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8. Question 38 · 335 in bank

   Your company sends all Google Cloud logs to Cloud Logging. Your security team wants to monitor the logs. You want to ensure that the security team can react quickly if an anomaly such as an unwanted firewall change or server breach is detected. You want to follow Google-recommended practices. What should you do?

   • ASchedule a cron job with Cloud Scheduler. The scheduled job queries the logs every minute for the relevant events.
   • BExport logs to BigQuery, and trigger a query in BigQuery to process the log data for the relevant events.
   • CExport logs to a Pub/Sub topic, and trigger Cloud Function with the relevant log events.
   • DExport logs to a Cloud Storage bucket, and trigger Cloud Run with the relevant log events.

   Show answer

   Answer: C

   Explanation

   I think C using BigQuery can get expensive if you have somehow check the logs for anomalies https://cloud.google.com/blog/products/management-tools/automate-your-response-to-a-cloud-logging-event check there is a diagram

   Source: Adapted from community discussion — kopper2019

   References

   • Google Cloud documentation

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9. Question 39 · 335 in bank

   You have deployed several instances on Compute Engine. As a security requirement, instances cannot have a public IP address. There is no VPN connection between Google Cloud and your office, and you need to connect via SSH into a specific machine without violating the security requirements. What should you do?

   • AConfigure Cloud NAT on the subnet where the instance is hosted. Create an SSH connection to the Cloud NAT IP address to reach the instance.
   • BAdd all instances to an unmanaged instance group. Configure TCP Proxy Load Balancing with the instance group as a backend. Connect to the instance using the TCP Proxy IP.
   • CConfigure Identity-Aware Proxy (IAP) for the instance and ensure that you have the role of IAP-secured Tunnel User. Use the gcloud command line tool to ssh into the instance.
   • DCreate a bastion host in the network to SSH into the bastion host from your office location. From the bastion host, SSH into the desired instance.

   Show answer

   Answer: C

   Explanation

   And D seems correct, bastion host is specifically used for this purpose, using option C user can connect through cloud only. By using a bastion host, you can connect to an VM that does not have an external IP address. This approach allows you to connect to a development environment or manage the database instance for your external application, for example, without configuring additional firewall rules. https://cloud.google.com/solutions/connecting-securely

   Source: Adapted from community discussion — ank82

   References

   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation
   • Google Cloud documentation

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10. Question 40 · 335 in bank

    Your company is using Google Cloud. You have two folders under the Organization: Finance and Shopping. The members of the development team are in a Google Group. The development team group has been assigned the Project Owner role on the Organization. You want to prevent the development team from creating resources in projects in the Finance folder. What should you do?

    • AAssign the development team group the Project Viewer role on the Finance folder, and assign the development team group the Project Owner role on the Shopping folder.
    • BAssign the development team group only the Project Viewer role on the Finance folder.
    • CAssign the development team group the Project Owner role on the Shopping folder, and remove the development team group Project Owner role from the Organization.
    • DAssign the development team group only the Project Owner role on the Shopping folder.

    Show answer

    Answer: C

    Explanation

    Answer C is correct. Answer A and B are both overridden by the less-restrictive permission on Organization level. Answer D permission was already there on Organization level, and does not remove the project owner permission on the other folder

    Source: Adapted from community discussion — milan74

    References

    • Google Cloud documentation

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PCA practice, question 31. 335 questions available.