Free GCP-PMLE sample questions

Correct answer: 1 = Agent Platform, 2 = Agent Platform, 3 = Cloud Natural Language API

Ticket priority and resolution time are organization-specific predictions that require custom models trained on your own ticket history, so they are served from Gemini Enterprise Agent Platform (formerly Vertex AI) endpoints. Sentiment analysis of general-language text with no domain-specific jargon is exactly what the pre-trained Cloud Natural Language API provides, so no custom sentiment model needs to be trained or maintained. Vision models do not apply to text tickets.

Correct answer: An optimization objective that maximizes the area under the precision-recall curve (AUC PR) value

Fraud is the rare (less common) class. For AutoML tabular classification, the AUC PR objective "maximize the area under the precision-recall curve" optimizes results for inferences for the less common class, balancing precision (few false positives) and recall (catching fraud). AUC ROC is the binary default and weighs both classes, log loss optimizes probability calibration, and precision at a fixed recall of 0.50 would miss half of the fraud.

Correct answer: 1= Dataflow, 2= BigQuery

Dataflow can process more than a million calls per day at scale in the originating region and can call Sensitive Data Protection (DLP) to de-identify PII before storage. BigQuery provides regional datasets and GoogleSQL, an ANSI-compliant SQL dialect, for the third-party visualization tool. Pub/Sub is messaging rather than processing, Datastore has no ANSI SQL interface, and Cloud SQL and Cloud Run functions are not designed for analytics at this scale.

Correct answer: Use Cloud Build linked with a GitHub repository to trigger retraining when new code is pushed to the repository.

A Cloud Build trigger connected to your Git repository (for example, GitHub) starts a build only when new code is pushed, so retraining runs automatically (no manual intervention), only when the architecture actually changes (minimal compute cost), and the code is version-controlled in Git. Submitting jobs manually with gcloud requires intervention, Cloud Storage is not version control, and a daily Composer sensor adds cost and polling overhead.

Correct answer: Use the BigQuery cell magic (%%bigquery) in the Workbench notebook to query the data, and ingest the results as a pandas dataframe.

In an Agent Platform Workbench instance the BigQuery client library is preinstalled, and the %%bigquery magic runs the SQL query, converts the results to a pandas DataFrame and can save it to a variable in one step (using the BigQuery Storage API for fast downloads). Exporting to CSV via Drive, local download or Cloud Storage adds unnecessary manual steps.

Correct answer: Import the prebuilt BigqueryQueryJobOp component from Google Cloud Pipeline Components, and use it as the first pipeline step to execute the query and pass its output to the next step.

Google Cloud Pipeline Components provide a prebuilt BigqueryQueryJobOp that launches a BigQuery query job, waits for it to finish and exposes the result as a pipeline artifact for downstream steps. Reusing a prebuilt component is the easiest option; writing your own script or custom component adds code to build and maintain, and running the query manually in the console is not part of the automated pipeline.

Correct answer: Split the training and test data based on time rather than a random split to avoid leakage.

Temperature readings are a time series. Readings an hour apart are highly correlated, so a random split puts near-copies of the test-period data into the training data. This data leakage made the test accuracy (97%) look much better than the real accuracy in production (66%). Google's guidance is to use a chronological split for time-series tasks. It also says to compute transformation statistics (for normalization or bucketizing) from the training split only and apply them to the validation and test splits. Applying transformations before splitting is itself a source of leakage. Adding more test data, or normalizing the training and test data as separate steps, doesn't remove the leakage that the random split causes.

Correct answer: Reduce the batch size.

A ResourceExhaustedError (OOM) means the tensors for one training step do not fit in GPU memory. Activation memory scales with the batch size, so reducing the batch size is the standard fix that keeps the model and input resolution unchanged. Changing the optimizer or learning rate does not materially change memory use, and reducing the image shape would change the model input and can hurt accuracy.

Correct answer: Decrease the recall.

Precision = TP / (TP + FP). To increase precision you raise the classification threshold so that fewer borderline images are labeled "car", which reduces false positives. The trade-off is that more true cars fall below the threshold, so false negatives increase and recall decreases. Increasing recall, increasing false positives or decreasing false negatives all move in the opposite direction.

Correct answer: 1. Build a notification system on Firebase. 2. Register each user with a user ID on the Firebase Cloud Messaging server, which sends a notification when your model predicts that a user’s account balance will drop below the $25 threshold.

Firebase Cloud Messaging (FCM) is designed to send notifications to individual users and devices at very large scale. Register each user with FCM, and send that user a message when the model predicts that their own balance will drop below $25. A Pub/Sub topic for each user doesn't scale to millions of customers. A project can have at most 10,000 topics, and you can't request an increase to this limit. This is true whether a Cloud Run function or an App Engine app sends the notifications. Sending a notification when the average of all users' predictions drops below $25 ignores each user's own forecast.