Q45 Cosmos DB Domain 2 · 25–30% of exam

Which Cosmos DB feature allows you to query data using the Spark API in Azure Synapse Analytics with zero ETL?

  1. A Cosmos DB change feed
  2. B Azure Data Factory pipeline
  3. C Azure Synapse Link for Cosmos DB (analytical store) (correct answer)
  4. D Azure Stream Analytics

Shortcut: Synapse Link enables HTAP by automatically syncing data to a column-store analytical replica. Synapse Spark and SQL Serverless can query this store directly with no ETL and no impact on Cosmos DB RUs.