GCP Associate Cloud Engineer Practice Question

Your company uses a single self-serve Cloud Billing account linked to four production projects. Finance must query daily cost data for all projects in BigQuery. Each engineering lead should receive an email alert when their own project reaches 50 % of its monthly budget, and they must not receive alerts for other projects. You want a solution that minimizes operational overhead and avoids custom code. What should you do?

Create a custom Cloud Monitoring dashboard with the Cloud Billing cost metric and configure alerting policies per project that send email notifications; do not enable any billing export.
Enable detailed usage cost export at the billing account level to a dedicated BigQuery dataset, then create an individual budget for each project scoped to that project with a 50 % alert that emails the corresponding engineering lead.
In every project, enable detailed usage cost export to its own BigQuery dataset and create a single budget scoped to the billing account with a 50 % alert threshold.
Export billing data to Cloud Storage, set up a scheduled transfer to load it into BigQuery, and configure a Cloud Pub/Sub budget alert with Cloud Functions that examine the project ID and email the proper lead.

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Answer Description

Exporting Cloud Billing data to BigQuery is configured once at the billing-account level and automatically includes usage and cost details for every linked project. A single export therefore satisfies Finance's requirement without per-project setup. Budgets can be scoped to an individual project. By creating one budget per project and setting a 50 % alert threshold, each engineering lead receives an email only for their own project. No additional services or custom logic are needed. Creating separate exports per project is impossible, because BigQuery export is not supported at the project level. Solutions that involve Cloud Storage pipelines, Cloud Functions, or Cloud Monitoring add unnecessary operational overhead compared with native Budget alerts.

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