Question:A data warehouse includes data from various sources including legacy systems. Legacy systems implies: 

A Systems that have been developed at different times by different people for a variety of purposes 
B Systems which are no longer useful 
C Systems whose data is outdated 
D Systems whose technology is outdated 
E Systems whose data is corrupt 

+ Answer
A 

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Md. Habib Ullah

Editor, VCampus

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