What is a data warehouse?

A.
A repository of information from heterogeneous databases

B.
A remote facility used for storing backup tapes

C.
A hot backup building

D.
A table in a relational database system

Explanation:

The correct answer is a repository of information from heterogeneous databases. Answers “A
remote facility used for storing backup tapes” and “A hot backup building” describe physical facilities
for backup and recovery of information systems, and answer “A table in a relational database
system” describes a relation in a relational database.