Data Warehousing Multiple Choice Questions and Answers

21. ____________ is called a multifield transformation.

1. Converting data from one field into multiple fields.
2. Converting data from fields into field.
3. Converting data from double fields into multiple fields.
4. Converting data from one field to one field.

22. Transient data is

1. data in which changes to existing records cause the previous version of the records to be eliminated.
2. data in which changes to existing records do not cause the previous version of the records to beeliminated.
3. data that are never altered or deleted once they have been added.
4. data that are never deleted once they have been added.

23. __________ is a subject-oriented, integrated, time-variant, nonvolatile collection of data in support of management decisions.

1. Data Mining
2. Data Warehousing
3. Web Mining
4. Text Mining

24. ......................... is a subject-oriented, integrated, time-variant, nonvolatile collection or data in support of management decisios.

1. Data Mining
2. DataWarehousing
3. Document Mining
4. Text Mining

25. __________ is the heart of the warehouse.

1. Data mining database servers.
2. Data warehouse database servers.
3. Data mart database servers.
4. Relational data base servers.

26. Reconciled data is

1. data stored in the various operational systems throughout the organization.
2. current data intended to be the single source for all decision supportsystems.
3. data stored in one operational system in the organization.
4. data that has been selected and formatted for end-user support applications.

27. ____________predicts future trends & behaviors, allowing business managers to make proactive,knowledge-driven decisions.

1. Data warehouse.
2. Data mining.
3. Datamarts.
4. Metadata.

28. Data can be updated in _____environment.

1. data warehouse.
2. data mining.
3. operational.
4. informational.

29. Expansion for DSS in DW is

1. Decision Support system.
2. Decision Single System.
3. Data Storable System.
4. Data Support System.

30. A snowflake schema is which of the following types of tables?

1. Fact
2. Dimension
3. Helper
4. All of the above