Which of the following is the MOST critical and contributes
the MOST to the quality of data in a data warehouse?
A. Accuracy of the source data
B. Credibility of the data source
C. Accuracy of the extraction process
D. Accuracy of the data transformation
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Answer: A
Accuracy of source data is a prerequisite for the quality of
the data in a data warehouse. Credibility of the data source
is important, accurate extraction processes are important
and accurate transformation routines are important but would
not change inaccurate data into quality (accurate) data.
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