Microsoft Certified: Fabric Analytics Engineer AssociateImplement and manage semantic models (30-35%)Medium
A data engineer is designing a semantic model in Microsoft Fabric. The model will consume data from an Azure Data Lake Storage Gen2 account, specifically Parquet files. Users require near real-time analytics on the latest data, with minimal latency and direct access to the data lake without full data ingestion. Which storage mode is best suited for this scenario?
- ADual Mode
- BDirectQuery Mode
- CDirect Lake Mode
- DImport Mode
Show answer & explanationAnswer & explanation
Correct answer: C. Direct Lake Mode
Direct Lake mode is specifically designed for scenarios requiring near real-time analytics directly on data lake sources (like Parquet files in ADLS Gen2) without importing data. It combines the performance of Import mode with the real-time capabilities of DirectQuery by reading data directly from the data lake, leveraging the V-Order optimization for Parquet files.
Why the other options are wrong
- A. Dual mode combines Import and DirectQuery, but Direct Lake offers a more integrated and optimized solution for direct data lake consumption without full ingestion.
- B. DirectQuery provides real-time access but typically has higher query latency compared to Direct Lake due to constant source querying and lack of caching.
- D. Import mode requires full data ingestion, which would not meet the 'minimal latency' and 'direct access without full ingestion' requirements.
Direct Lake Mode
Direct Lake mode in Microsoft Fabric provides near real-time analytics directly on data lake sources (e.g., Parquet files) without data ingestion, combining Import-like performance with DirectQuery's real-time capabilities.
- Reads data directly from data lake (e.g., Delta Lake, Parquet).
- Offers near real-time performance.
- Leverages V-Order optimization for Parquet.
- Avoids data duplication and ingestion overhead.
Memory trick: Import, DirectQuery, Dual, Lake – each has a speed and data fate.