What are the three layers of Data warehouse architecture?
A. Data Extraction layer, Data Accesses layer, Data Storage layer
B. Data Modelling layer, Data Accesses layer, Data Storage layer
C. Data staging layer, Data Extract layer, Data transnational layer
D. None of the listed options
Solution (By Examveda Team)
In general, all data warehouse systems have the following layers:1. Data Source Layer
2. Data Extraction Layer
3. Staging Area
4. ETL Layer
5. Data Storage Layer
6. Data Logic Layer
7. Data Presentation Layer
8. Metadata Layer
9. System Operations Layer
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