Data Warehousing MCQs

Question 1

Reconciled data is which of the following?

Accepted Answer

Current data intended to be the single source for all decision support systems.

Answer

Data stored in the various operational systems throughout the organization.

Answer

Data stored in one operational system in the organization.

Answer

Data that has been selected and formatted for end-user support applications.

Question 2

The load and index is which of the following?

Accepted Answer

A process to load the data in the data warehouse and to create the necessary indexes

Answer

A process to reject data from the data warehouse and to create the necessary indexes

Answer

A process to upgrade the quality of data after it is moved into a data warehouse

Answer

A process to upgrade the quality of data before it is moved into a data warehouse

Question 3

The extract process is which of the following?

Accepted Answer

Capturing a subset of the data contained in various operational systems

Answer

Capturing all of the data contained in various operational systems

Answer

Capturing all of the data contained in various decision support systems

Answer

Capturing a subset of the data contained in various decision support systems

Question 4

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

Accepted Answer

One-to-many

Answer

Many-to-many

Answer

One-to-one

Answer

All of the above

Question 5

Transient data is which of the following?

Accepted Answer

Data in which changes to existing records cause the previous version of the records to be eliminated

Answer

Data in which changes to existing records do not cause the previous version of the records to be eliminated

Answer

Data that are never altered or deleted once they have been added

Answer

Data that are never deleted once they have been added

Question 6

A multifield transformation does which of the following?

Accepted Answer

All of the above

Answer

Converts data from one field into multiple fields

Answer

Converts data from multiple fields into one field

Answer

Converts data from multiple fields into multiple fields

Question 7

A data mart is designed to optimize the performance for well-defined and predicable uses.

Accepted Answer

True

Answer

False

Question 8

Successful data warehousing requires that a formal program in total quality management (TQM) be implemented.

Accepted Answer

True

Answer

False

Question 9

Data in operational systems are typically fragmented and inconsistent.

Accepted Answer

True

Answer

False