Data Warehousing - General Questions

1.

A multifield transformation does which of the following?

A.	Converts data from one field into multiple fields
B.	Converts data from multiple fields into one field
C.	Converts data from multiple fields into multiple fields
D.	All of the above

Answer: Option D

Explanation:

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2.

Transient data is which of the following?

A.	Data in which changes to existing records cause the previous version of the records to be eliminated
B.	Data in which changes to existing records do not cause the previous version of the records to be eliminated
C.	Data that are never altered or deleted once they have been added
D.	Data that are never deleted once they have been added

Answer: Option A

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3.

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

A.	Many-to-many
B.	One-to-one
C.	One-to-many
D.	All of the above.

Answer: Option C

Explanation:

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4.

The extract process is which of the following?

A.	Capturing all of the data contained in various operational systems
B.	Capturing a subset of the data contained in various operational systems
C.	Capturing all of the data contained in various decision support systems
D.	Capturing a subset of the data contained in various decision support systems

Answer: Option B

Explanation:

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5.

The load and index is which of the following?

A.	A process to reject data from the data warehouse and to create the necessary indexes
B.	A process to load the data in the data warehouse and to create the necessary indexes
C.	A process to upgrade the quality of data after it is moved into a data warehouse
D.	A process to upgrade the quality of data before it is moved into a data warehouse

Answer: Option B

Explanation:

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6.

Reconciled data is which of the following?

A.	Data stored in the various operational systems throughout the organization.
B.	Current data intended to be the single source for all decision support systems.
C.	Data stored in one operational system in the organization.
D.	Data that has been selected and formatted for end-user support applications.

Answer: Option B

Explanation:

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7.

Data transformation includes which of the following?

A.	A process to change data from a detailed level to a summary level
B.	A process to change data from a summary level to a detailed level
C.	Joining data from one source into various sources of data
D.	Separating data from one source into various sources of data

Answer: Option A

Explanation:

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8.

Fact tables are which of the following?

A.	Completely denoralized
B.	Partially denoralized
C.	Completely normalized
D.	Partially normalized

Answer: Option C

Explanation:

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