GCP Associate Cloud Engineer Practice Question

Your company's Google Cloud billing account is used by multiple projects. You have created a budget of USD 10 000 per month for the account and want automatic email notifications sent when spending reaches 50 %, 90 %, and 100 % of that amount. In the Budgets & alerts page of the Cloud Console, which configuration satisfies this requirement with the least additional setup?

Enter three fixed-amount threshold rules of USD 5 000, USD 9 000, and USD 10 000 and disable all percentage-based alerts.
Add three percentage-based alert threshold rules-0.5, 0.9, and 1.0-and rely on the default email notifications that Google Cloud sends to billing-related IAM roles.
Configure a Cloud Monitoring alerting policy that queries Cloud Billing BigQuery export data and emails users when spend approaches the budget.
Create one Pub/Sub notification channel and subscribe the finance team to the topic; set a single 1.0 alert threshold rule that publishes to Pub/Sub.

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Answer Description

A budget can contain one or more alert threshold rules, each expressed as a percentage of the budgeted amount. Adding alert thresholds of 0.5, 0.9, and 1 triggers notifications when the accrued spend crosses USD 5 000, USD 9 000, and USD 10 000, respectively. Google Cloud automatically emails every Billing Account Administrator, Billing Account User, and Project Billing Manager linked to the billing account, so no extra notification mechanism (such as Pub/Sub or Cloud Monitoring) is required. Setting only a single threshold or using Pub/Sub alone would miss some percentage targets or require additional downstream configuration. Entering specific currency amounts is acceptable but would need three separate rules; using percentage values meets the requirement in a single step and scales automatically if the budget changes.

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