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Cloud Developer PCD Practice Questions

Google Cloud Certified - Professional Cloud Developer

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Question 1

You work for an ecommerce company. You are developing a new application to be deployed globally with the following requirements:

The application must have access to the most up-to-date data at all times.
Data should be consistent across all regions.
Data older than 30 days must be automatically deleted.

You need to determine which service should host the database, and how to configure the data deletion. You want to use the most efficient solution. What should you do?

Configure Spanner to host the database. Create a time to live (TTL) policy that deletes data older than 30 days.
Configure Spanner to host the database. Use Data Catalog to delete data older than 30 days.
Configure Bigtable to host the database. Create a garbage collection policy in Bigtable that deletes data older than 30 days.
Configure Bigtable to host the database. Create a TTL policy that deletes data older than 30 days.

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Question 2

You are migrating a legacy application from your on-premises environment to Cloud Run. The application processes images that are uploaded by application users. The application currently uses a cron job on an on-premises server to trigger image processing. You need to replace the cron job with a serverless solution that triggers the Cloud Run service as soon as a new image is uploaded to a Cloud Storage bucket. You want to implement a simple solution that follows Google-recommended practices. What should you do?

Configure Eventarc to listen to Cloud Storage object creation events and invoke the Cloud Run service.
Create a Cloud Scheduler job that invokes a Cloud Run function on the same schedule as the cron job. Implement logic in the function to scan the Cloud Storage bucket for new files and invoke the Cloud Run service if new files are found.
Configure Eventarc to listen to Cloud Storage object creation events and invoke a Cloud Run function. Use the Cloud Run function to invoke the Cloud Run service.
Configure Eventarc to listen to Cloud Storage object creation events and route those events to a Pub/Sub topic. Subscribe a separate Cloud Run function to the Pub/Sub topic. Configure the Cloud Run function to directly invoke the Cloud Run service's endpoint.

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Question 3

You are developing a new ecommerce website for your company. You want customers to receive a customized email notification when they place an order. You need to configure this email service while minimizing deployment effort. What should you do?

Create a Cloud Run function that is triggered by a create type event in Firestore.
Create an email-sending application hosted on Compute Engine that is invoked by an HTTP request.
Create an email notification channel, and set up an alerting policy that is based on log metrics from a create type event.
Use Pub/Sub to send an email when the orders/ API returns an HTTP response of 200 OK .

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Question 4

You are developing an application that will process a large number of image files stored in Cloud Storage. The application uses the Cloud Vision API to analyze each image and extract relevant information. You notice request quota errors from the Cloud Vision API. You need to optimize your application to avoid these errors and efficiently process all the images while following Google-recommended practices. What should you do?

Compress and reduce the size of images before sending them to the Cloud Vision API.
Request a quota increase for the Cloud Vision API.
Implement a retry mechanism to wait 10 seconds before resending failed requests.
Batch multiple image analysis requests into a single API call and implement exponential backoff when encountering failed requests.

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Question 5

You are deploying a new version of your application to a GKE cluster using a rolling update of a Kubernetes Deployment named shopping-cart. After the rolling update completes, you observe that some users are experiencing errors and degraded performance, indicating an issue with the new version. You want to quickly and safely revert to the previous version of the application while minimizing the impact on users while following Google-recommended practices. What should you do?

Run the kubectl edit deployment/shopping-cart command and change the Deployment to reference the image tag of the previous version.
Run the kubectl rollout undo deployment/shopping-cart command.
Deploy the previous version with zero replicas. Scale down the new Deployment version to zero replicas and scale up the previous version of the Deployment to the desired number of replicas.
Run the kubectl delete deployment/shopping-cart command and recreate the Deployment with the previous version's image tag.

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Question 6

You recently developed an application that monitors a large number of stock prices. You need to configure Pub/Sub to receive a very high volume of messages and store the latest stock price in a single large in-memory database. The downstream service needs only the most up-to-date prices in the in-memory database to perform stock trading transactions. Each message contains three pieces of information:

Stock symbol
Stock price
Timestamp for the update

You need to set up your Pub/Sub subscription to process messages as quickly as possible and ignore older prices. What should you do?

Create a push subscription with both ordering and exactly-once delivery turned off.
Create a pull subscription with exactly-once delivery enabled.
Create a pull subscription with both ordering and exactly-once delivery turned off.
Create a push subscription with exactly-once delivery enabled.

Select an answer above, then submit your vote. Reading or practicing does not cast a vote.

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