Data Warehousing Questions and Answers

Exercise

Exercise 1
Exercise 2

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Q 1
The generic two-level data warehouse architecture includes which of the following?

A) At least one data mart

B) Data that can extracted from numerous internal and external sources

C) Near real-time updates

D) All of the above.


Correct Option - B

Explanation


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Q 2
A goal of data mining includes which of the following?

A) To explain some observed event or condition

B) To confirm that data exists

C) To analyze data for expected relationships

D) To create a new data warehouse


Correct Option - A

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Q 3
Data scrubbing 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


Correct Option - D

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Q 4
The @active data warehouse architecture includes which of the following?

A) At least one data mart

B) Data that can extracted from numerous internal and external sources

C) Near real-time updates

D) All of the above.


Correct Option - D

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Q 5
Fact tables are which of the following?

A)   Completely denoralized

B)   Partially denoralized

C)   Completely normalized

D)   Partially normalized


Correct Option - C

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Q 6
An operational system is which of the following?

A) A system that is used to run the business in real time and is based on historical data.

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

C) A system that is used to support decision making and is based on current data.

D) A system that is used to support decision making and is based on historical data.


Correct Option - B

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Q 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


Correct Option - A

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