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Data Warehousing

Data Warehousing
Derived data are detailed, current data intended to be the single, authoritative source for all decision support applications.

False
True

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Data Warehousing
Periodic data are data that are physically altered once added to the store.

True
False

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Data Warehousing
Data scrubbing can help upgrade data quality; it is not a long-term solution to the data quality problem.

False
True

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Data Warehousing
A multifield transformation does which of the following?

All of these
Converts data from one field into multiple fields
Converts data from multiple fields into multiple fields
Converts data from multiple fields into one field

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Data Warehousing
A star schema has what type of relationship between a dimension and fact table?

One-to-many
All of these
Many-to-many
One-to-one

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Data Warehousing
A goal of data mining includes which of the following?

To confirm that data exists
To explain some observed event or condition
To analyze data for expected relationships
To create a new data warehouse

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