The following is true of three-tier data warehouses:
A)Once created, the data marts will keep on being updated from the data warehouseat periodic times
B)Once created, the data marts will directly receive their new data from the operational databases
C)The data marts are different groups of tables in the data warehouse
D)A data mart becomes a data warehouse when it reaches a critical size

Question

Quizplus · Accepted Answer

A three-tier data warehouse architecture typically involves a central data warehouse that periodically updates data marts, which are subsets of the data warehouse designed for specific business lines or functions. Data marts do not directly receive new data from operational databases; instead, they are updated from the central data warehouse. Data marts are distinct from the data warehouse and do not become a data warehouse upon reaching a certain size; they serve different purposes within the data architecture.

The Following Is True of Three-Tier Data Warehouses