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Data Warehousing Questions

Home > Technical Aptitude > Database > Data Warehousing > General Questions
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Choose the correct option.

A multifield transformation does which of the following?


AConvertsdatafromonefieldintomultiplefields

BConverts data from multiple fields into one field

CConverts data from multiple fields into multiple fields

DAll of the above

Answer: Option D

Explanation:

Here is no explanation for this answer

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Star schema is suited to online transaction processing, and therefore is generally used in operational systems, operational data stores, or an EDW.


ATRUE

BFALSE

Answer: Option B

Explanation:

Here is no explanation for this answer

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


AMany-to-many

BOne-to-one

COne-to-many

DAll of the above.

Answer: Option C

Explanation:

Here is no explanation for this answer

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An operational system is which of the following?


AAsystemthatisusedtorunthebusinessinrealtimeandisbasedonhistoricaldat

BA system that is used to run the business in real time and is based on current data.

CA system that is used to support decision making and is based on current data.

DA system that is used to support decision making and is based on historical data.

Answer: Option B

Explanation:

Here is no explanation for this answer

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Most operational systems are based on the use of transient data.


ATRUE

BFALSE

Answer: Option A

Explanation:

Here is no explanation for this answer

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Static extract is used for ongoing warehouse maintenance.


ATRUE

BFALSE

Answer: Option B

Explanation:

Here is no explanation for this answer

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


ATRUE

BFALSE

Answer: Option B

Explanation:

Here is no explanation for this answer

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


AFact

BDimension

CHelper

DAll of the above

Answer: Option D

Explanation:

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The @active data warehouse architecture includes which of the following?


AAtleastonedatamart

BData that can extracted from numerous internal and external sources

CNear real-time updates

DAll of the above.

Answer: Option D

Explanation:

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Data in operational systems are typically fragmented and inconsistent.


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BFALSE

Answer: Option A

Explanation:

Here is no explanation for this answer

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