PCD practice questions 191–200

1. Question 191 · 357 in bank

   Your company's security team uses Identity and Access Management (IAM) to track which users have access to which resources. You need to create a version control system that can integrate with your security team's processes. You want your solution to support fast release cycles and frequent merges to your main branch to minimize merge conflicts. What should you do?

   • ACreate a Cloud Source Repositories repository, and use trunk-based development.
   • BCreate a Cloud Source Repositories repository, and use feature-based development.
   • CCreate a GitHub repository, mirror it to a Cloud Source Repositories repository, and use trunk-based development.
   • DCreate a GitHub repository, mirror it to a Cloud Source Repositories repository, and use feature-based development.

   Show answer

   Answer: A

   Explanation

   I choose A. Where does the GitHub repository requirement come from? The security team uses IAM for user accesses and we only need to create a version control system that can integrate with their processes. IAM can't control who is pushing stuff in GitHub and with options C or D it will end up in CSR regardless. Fast release cycles and frequent merges to the main branch to minimize merge conflicts -> trunk-based development.

   Source: Adapted from community discussion — wanrltw

   Next question

2. Question 192 · 357 in bank

   You recently developed an application that monitors a large number of stock prices. You need to configure Pub/Sub to receive messages and update the current stock price in an in-memory database. A downstream service needs the most up-to-date prices in the in-memory database to perform stock trading transactions. Each message contains three pieces or information: • Stock symbol • Stock price • Timestamp for the update How should you set up your Pub/Sub subscription?

   • ACreate a push subscription with exactly-once delivery enabled.
   • BCreate a pull subscription with both ordering and exactly-once delivery turned off.
   • CCreate a pull subscription with ordering enabled, using the stock symbol as the ordering key.
   • DCreate a push subscription with both ordering and exactly-once delivery turned off.

   Show answer

   Answer: C

   Explanation

   Pull Subscription for Controlled Processing: A pull subscription gives you control over when and how messages are processed. This can be particularly important for maintaining the integrity of the in-memory database, as it allows for more deliberate handling of message backlogs and peak loads. Message Ordering Is Crucial: The ordering of stock price updates is critical. Using the stock symbol as the ordering key ensures that updates for a specific stock are processed in the order they were sent. This is vital to ensure the accuracy of stock price data, as prices must be updated in the sequence they were received to reflect the true market conditions. No Need for Exactly-Once Delivery: In most financial data scenarios, the latest data supersedes the old. If a message is delivered more than once, the last update for a given timestamp will leave the database in the correct state. Therefore, exactly-once delivery, which can add complexity and overhead, might not be necessary.

   Source: Adapted from community discussion — vspringe

   Next question

3. Question 193 · 357 in bank

   You are a developer at a social media company. The company runs their social media website on-premises and uses MySQL as a backend to store user profiles and user posts. Your company plans to migrate to Google Cloud, and your learn will migrate user profile information to Firestore. You are tasked with designing the Firestore collections. What should you do?

   • ACreate one root collection for user profiles, and create one root collection for user posts.
   • BCreate one root collection for user profiles, and create one subcollection for each user's posts.
   • CCreate one root collection for user profiles, and store each user's post as a nested list in the user profile document.
   • DCreate one root collection for user posts, and create one subcollection for each user's profile.

   Show answer

   Answer: B

   Next question

4. Question 194 · 357 in bank

   Your team recently deployed an application on Google Kubernetes Engine (GKE). You are monitoring your application and want to be alerted when the average memory consumption of your containers is under 20% or above 80%. How should you configure the alerts?

   • ACreate a Cloud Function that consumes the Monitoring API. Create a schedule to trigger the Cloud Function hourly and alert you if the average memory consumption is outside the defined range.
   • BIn Cloud Monitoring, create an alerting policy to notify you if the average memory consumption is outside the defined range.
   • CCreate a Cloud Function that runs on a schedule, executes kubectl top on all the workloads on the cluster, and sends an email alert if the average memory consumption is outside the defined range.
   • DWrite a script that pulls the memory consumption of the instance at the OS level and sends an email alert if the average memory consumption is outside the defined range.

   Show answer

   Answer: B

   Explanation

   B. using Cloud Monitoring to create an alerting policy is the most efficient, reliable, and straightforward method to monitor and be alerted about the memory consumption of your containers in GKE.

   Source: Adapted from community discussion — vspringe

   References

   • Google Cloud documentation

   Next question

5. Question 195 · 357 in bank

   You manage a microservice-based ecommerce platform on Google Cloud that sends confirmation emails to a third-party email service provider using a Cloud Function. Your company just launched a marketing campaign, and some customers are reporting that they have not received order confirmation emails. You discover that the services triggering the Cloud Function are receiving HTTP 500 errors. You need to change the way emails are handled to minimize email loss. What should you do?

   • AIncrease the Cloud Function's timeout to nine minutes.
   • BConfigure the sender application to publish the outgoing emails in a message to a Pub/Sub topic. Update the Cloud Function configuration to consume the Pub/Sub queue.
   • CConfigure the sender application to write emails to Memorystore and then trigger the Cloud Function. When the function is triggered, it reads the email details from Memorystore and sends them to the email service.
   • DConfigure the sender application to retry the execution of the Cloud Function every one second if a request fails.

   Show answer

   Answer: B

   Explanation

   This is a robust and scalable approach. By decoupling the email sending process using Pub/Sub, you introduce a queueing mechanism. This ensures that even if the Cloud Function encounters an issue, the email messages are not lost but remain in the queue. Additionally, Pub/Sub can handle high throughput and provides retry mechanisms.

   Source: Adapted from community discussion — plutonians123

   Next question

6. Question 196 · 357 in bank

   You have a web application that publishes messages to Pub/Sub. You plan to build new versions of the application locally and need to quickly test Pub/Sub integration for each new build. How should you configure local testing?

   • AIn the Google Cloud console, navigate to the API Library, and enable the Pub/Sub API. When developing locally configure your application to call pubsub.googleapis.com.
   • BInstall the Pub/Sub emulator using gcloud, and start the emulator with a valid Google Project ID. When developing locally, configure your applicat.cn to use the local emulator by exporting the PUBSUB_EMULATOR_HOST variable.
   • CRun the gcloud config set api_endpoint_overrides/pubsub https://pubsubemulator.googleapis.com.com/ command to change the Pub/Sub endpoint prior to starting the application.
   • DInstall Cloud Code on the integrated development environment (IDE). Navigate to Cloud APIs, and enable Pub/Sub against a valid Google Project IWhen developing locally, configure your application to call pubsub.googleapis.com.

   Show answer

   Answer: B

   Explanation

   For local testing of Pub/Sub integration in a web application, installing and using the Pub/Sub emulator is the most efficient approach. The emulator can be installed via gcloud and started with a valid Google Project ID. Configuring your application to use the emulator locally is done by setting the PUBSUB_EMULATOR_HOST environment variable. For more details on setting up and using the Pub/Sub emulator, visit: Google Cloud Documentation: https://cloud.google.com/pubsub/docs/emulator

   Source: Adapted from community discussion — plutonians123

   References

   • Google Cloud documentation

   Next question

7. Question 197 · 357 in bank

   You recently developed an application that monitors a large number of stock prices. You need to configure Pub/Sub to receive a high volume messages and update the current stock price in a single large in-memory database. A downstream service needs the most up-to-date prices in the in-memory database to perform stock trading transactions. Each message contains three pieces or information: • Stock symbol • Stock price • Timestamp for the update How should you set up your Pub/Sub subscription?

   • ACreate a pull subscription with exactly-once delivery enabled.
   • BCreate a push subscription with both ordering and exactly-once delivery turned off.
   • CCreate a push subscription with exactly-once delivery enabled.
   • DCreate a pull subscription with both ordering and exactly-once delivery turned off.

   Show answer

   Answer: A

   Explanation

   https://cloud.google.com/pubsub/docs/exactly-once-delivery "This page explains how to receive and acknowledge messages using exactly-once semantics. Only the pull subscription type supports exactly-once delivery, including subscribers that use the StreamingPull API. Push and export subscriptions don't support exactly-once delivery."

   Source: Adapted from community discussion — Adpese_1

   References

   • Google Cloud documentation

   Next question

8. Question 198 · 357 in bank

   Select 2

   Your team has created an application that is hosted on a Google Kubemetes Engine (GKE) cluster. You need to connect the application to a legacy REST service that is deployed in two GKE clusters in two different regions. You want to connect your application to the legacy service in a way that is resilient and requires the fewest number of steps. You also want to be able to run probe-based health checks on the legacy service on a separate port. How should you set up the connection? (Choose two.)

   • AUse Traffic Director with a sidecar proxy to connect the application to the service.
   • BSet up a proxyless Traffic Director configuration for the application.
   • CConfigure the legacy service's firewall to allow health checks originating from the sidecar proxy.
   • DConfigure the legacy service's firewall to allow health checks originating from the application.
   • EConfigure the legacy service's firewall to allow health checks originating from the Traffic Director control plane.

   Show answer

   Answer: AC

   Explanation

   1.Use Traffic Director with a sidecar proxy (Option A):This enables reliable communication between your application and the legacy service. The sidecar proxy can manage traffic routing, load balancing, and resilience. 2. Configure the legacy service's firewall to allow health checks originating from the sidecar proxy (Option C):By allowing health checks from the sidecar proxy, you ensure that the health checks, which are necessary for ensuring service availability, are permitted by the firewall.

   Source: Adapted from community discussion — MFay

   Next question

9. Question 199 · 357 in bank

   You are monitoring a web application that is written in Go and deployed in Google Kubernetes Engine. You notice an increase in CPU and memory utilization. You need to determine which function is consuming the most CPU and memory resources. What should you do?

   • AAdd print commands to the application source code to log when each function is called, and redeploy the application.
   • BCreate a Cloud Logging query that gathers the web application s logs. Write a Python script that calculates the difference between the timestamps from the beginning and the end of the application's longest functions to identify time-intensive functions.
   • CImport OpenTelemetry and Trace export packages into your application, and create the trace provider. Review the latency data for your application on the Trace overview page, and identify which functions cause the most latency.
   • DImport the Cloud Profiler package into your application, and initialize the Profiler agent. Review the generated flame graph in the Google Cloud console to identify time-intensive functions.

   Show answer

   Answer: D

   References

   • cncf.io documentation

   Next question

10. Question 200 · 357 in bank

    You are creating a Google Kubernetes Engine (GKE) cluster and run this command:

    

    The command fails with the error:

    

    You want to resolve the issue. What should you do?

    • ARequest additional GKE quota in the GCP Console.
    • BRequest additional Compute Engine quota in the GCP Console.
    • COpen a support case to request additional GKE quota.
    • DDecouple services in the cluster, and rewrite new clusters to function with fewer cores.

    Show answer

    Answer: B

    Explanation

    https://cloud.google.com/kubernetes-engine/docs/concepts/cluster-architecture: "A cluster typically has one or more nodes, which are the worker machines that run your containerized applications and other workloads. The individual machines are Compute Engine VM instances that GKE creates on your behalf when you create a cluster." Error message mentions "CPU" so this would refer to Compute Engine VMs Answer is B

    Source: Adapted from community discussion — syu31svc

    References

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

    Next question

Keyboard:J Kmove between questionsA–Dselect an answerRshow or hide the answer← →change page

PCD practice, question 191. 357 questions available.