正解:D
A data warehouse is designed for analytical workloads (OLAP) , not transactional workloads (OLTP).
It integrates data from multiple sources and supports complex queries, aggregations, and reporting for decision-making.
A). storage for transactional LOB apps # describes OLTP (e.g., SQL Server, Azure SQL Database), not a data warehouse.
B). transformation services # describes ETL/ELT pipelines (e.g., Data Factory), not the warehouse itself.
C). read-only storage of historical data # partially true but too narrow; the key feature is analytics, not just storage.
D). answers to complex queries across multiple sources # Correct and complete definition.
The Answer: D
Reference: What is a data warehouse?