professional-cloud-data-engineer
Prepare and test your skills
Prepare and test your skills
Worked example. The correct answer is already marked and every option is explained below, so there is nothing to select here. To answer questions yourself, start the free trial.
Keep the momentum going with these hand-picked practice scenarios
Want more questions like this?
Get a free certification question every week.
Last updated
A retail enterprise maintains a central BigQuery table containing precalculated hourly sales performance metrics. A Looker Studio executive dashboard connected to this dataset is accessed frequently by hundreds of regional managers throughout the business day.
The underlying data pipeline updates the BigQuery precalculated table every hour on the hour. You need to configure the Looker Studio data source connection to minimize BigQuery query costs and visualization latency while strictly honoring the 1-hour reporting freshness SLA.
How should you configure the data source connection in Looker Studio?
Configure the data source to query raw transaction records directly and use chart-specific calculated fields to aggregate metrics on demand.
Configure the data source to use Viewer's Credentials and set the data freshness threshold to 1 hour.
Configure the data source to use Owner's Credentials and set the data freshness threshold to 1 hour.
Configure the data source to use Owner's Credentials and retain the default 12-hour data freshness threshold, relying on report viewers to click Refresh Data.
Configure the data source to query raw transaction records directly and use chart-specific calculated fields to aggregate metrics on demand.
Configure the data source to use Viewer's Credentials and set the data freshness threshold to 1 hour.
Configure the data source to use Owner's Credentials and set the data freshness threshold to 1 hour.
Configuring a Looker Studio data source with Owner's Credentials and setting a 1-hour data freshness threshold optimizes cached query reuse across all dashboard consumers while aligning cache invalidation with the underlying hourly ingestion pipeline.
This approach directly balances performance, storage, and freshness SLAs by pairing centralized cache management (via Owner's Credentials) with scheduled pipeline cadence (1-hour cache eviction).
Configure the data source to use Owner's Credentials and retain the default 12-hour data freshness threshold, relying on report viewers to click Refresh Data.