PROFESSIONAL-CLOUD-DEVELOPER Online Practice Questions and Answers

Your application performs well when tested locally, but it runs significantly slower when you deploy it to App Engine standard environment. You want to diagnose the problem. What should you do?

A. File a ticket with Cloud Support indicating that the application performs faster locally.

B. Use Stackdriver Debugger Snapshots to look at a point-in-time execution of the application.

C. Use Stackdriver Trace to determine which functions within the application have higher latency.

D. Add logging commands to the application and use Stackdriver Logging to check where the latency problem occurs.

Users are complaining that your Cloud Run-hosted website responds too slowly during traffic spikes. You want to provide a better user experience during traffic peaks. What should you do?

A. Read application configuration and static data from the database on application startup.

B. Package application configuration and static data into the application image during build time.

C. Perform as much work as possible in the background after the response has been returned to the user.

D. Ensure that timeout exceptions and errors cause the Cloud Run instance to exit quickly so a replacement instance can be started.

You are developing an application that will handle requests from end users. You need to secure a Cloud Function called by the application to allow authorized end users to authenticate to the function via the application while restricting access to unauthorized users. You will integrate Google Sign-In as part of the solution and want to follow Google- recommended best practices. What should you do?

A. Deploy from a source code repository and grant users the roles/cloudfunctions.viewer role.

B. Deploy from a source code repository and grant users the roles/cloudfunctions.invoker role

C. Deploy from your local machine using gcloud and grant users the roles/cloudfunctions.admin role

D. Deploy from your local machine using gcloud and grant users the roles/cloudfunctions.developer role

You are developing an application that will allow clients to download a file from your website for a specific period of time. How should you design the application to complete this task while following Google-recommended best practices?

A. Configure the application to send the file to the client as an email attachment.

B. Generate and assign a Cloud Storage-signed URL for the file. Make the URL available for the client to download.

C. Create a temporary Cloud Storage bucket with time expiration specified, and give download permissions to the bucket. Copy the file, and send it to the client.

D. Generate the HTTP cookies with time expiration specified. If the time is valid, copy the file from the Cloud Storage bucket, and make the file available for the client to download.

You have recently instrumented a new application with OpenTelemetry, and you want to check the latency of your application requests in Trace. You want to ensure that a specific request is always traced. What should you do?

A. Wait 10 minutes, then verify that Trace captures those types of requests automatically.

B. Write a custom script that sends this type of request repeatedly from your dev project.

C. Use the Trace API to apply custom attributes to the trace.

D. Add the X-Cloud-Trace-Context header to the request with the appropriate parameters.

Your teammate has asked you to review the code below. Its purpose is to efficiently add a large number of small rows to a BigQuery table.

Which improvement should you suggest your teammate make?

A. Include multiple rows with each request.

B. Perform the inserts in parallel by creating multiple threads.

C. Write each row to a Cloud Storage object, then load into BigQuery.

D. Write each row to a Cloud Storage object in parallel, then load into BigQuery.

You are load testing your server application. During the first 30 seconds, you observe that a previously inactive Cloud Storage bucket is now servicing 2000 write requests per second and 7500 read requests per second. Your application is now receiving intermittent 5xx and 429 HTTP responses from the Cloud Storage JSON API as the demand escalates. You want to decrease the failed responses from the Cloud Storage API. What should you do?

A. Distribute the uploads across a large number of individual storage buckets.

B. Use the XML API instead of the JSON API for interfacing with Cloud Storage.

C. Pass the HTTP response codes back to clients that are invoking the uploads from your application.

D. Limit the upload rate from your application clients so that the dormant bucket's peak request rate is reached more gradually.

Your company stores their source code in a Cloud Source Repositories repository. Your company wants to build and test their code on each source code commit to the repository and requires a solution that is managed and has minimal operations overhead.

Which method should they use?

A. Use Cloud Build with a trigger configured for each source code commit.

B. Use Jenkins deployed via the Google Cloud Platform Marketplace, configured to watch for source code commits.

C. Use a Compute Engine virtual machine instance with an open source continuous integration tool, configured to watch for source code commits.

D. Use a source code commit trigger to push a message to a Cloud Pub/Sub topic that triggers an App Engine service to build the source code.

You have an application that uses an HTTP Cloud Function to process user activity from both desktop browser and mobile application clients. This function will serve as the endpoint for all metric submissions using HTTP POST.

Due to legacy restrictions, the function must be mapped to a domain that is separate from the domain requested by users on web or mobile sessions. The domain for the Cloud Function is https://fn.example.com. Desktop and mobile clients

use the domain https://www.example.com. You need to add a header to the function's HTTP response so that only those browser and mobile sessions can submit metrics to the Cloud Function.

Which response header should you add?

A. Access-Control-Allow-Origin: *

B. Access-Control-Allow-Origin: https://*.example.com

C. Access-Control-Allow-Origin: https://fn.example.com

D. Access-Control-Allow-origin: https://www.example.com

Your team is writing a backend application to implement the business logic for an interactive voice response (IVR) system that will support a payroll application. The IVR system has the following technical characteristics:

?Each customer phone call is associated with a unique IVR session.

?The IVR system creates a separate persistent gRPC connection to the backend for each session.

?If the connection is interrupted, the IVR system establishes a new connection, causing a slight latency for that call.

You need to determine which compute environment should be used to deploy the backend application. Using current call data, you determine that:

?Call duration ranges from 1 to 30 minutes.

?Calls are typically made during business hours.

?There are significant spikes of calls around certain known dates (e.g., pay days), or when large payroll changes occur.

You want to minimize cost, effort, and operational overhead. Where should you deploy the backend application?

A. Compute Engine

B. Google Kubernetes Engine cluster in Standard mode

C. Cloud Functions

D. Cloud Run