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What is data granularity?

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Data granularity refers to the level of ...

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The results generated in the map phase are combined in the ________ phase.


A) pig
B) control
C) reduce
D) construct

E) A) and D)
F) C) and D)

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Users in a data mart obtain data that pertain to a particular business function from a data warehouse.

A) True
B) False

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An advantage of data warehouses is the low cost required to create,staff,and operate them.

A) True
B) False

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Which of the following statements is true of business intelligence (BI) systems?


A) Business intelligence systems are primarily used for developing software systems and data mining applications.
B) The four standard components of business intelligence systems are software,procedures,applications,and programs.
C) The software component of a business intelligence system is called an intelligence database.
D) Business intelligence systems analyze an organization's past performance to make predictions.

E) None of the above
F) A) and B)

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What are the three primary activities in the business intelligence process?

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The three primary activities in the busi...

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BigData has volume,velocity,and variation characteristics that far exceed those of traditional reporting and data mining.

A) True
B) False

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In the ________ phase,a BigData collection is broken into pieces and hundreds or thousands of independent processors search these pieces for something of interest.


A) crash
B) break
C) reduce
D) map

E) All of the above
F) B) and C)

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How does business intelligence help marketers identify changes in the purchasing patterns of customers?

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Retailers know that important life event...

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________ are user requests for particular business intelligence results on a particular schedule or in response to particular events.


A) Subscriptions
B) Third-party cookies
C) Static reports
D) Dynamic reports

E) None of the above
F) C) and D)

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________ is used to measure the impact of a set of variables on another variable during data mining.


A) Cluster analysis
B) Context indexing
C) Cloud computing
D) Regression analysis

E) B) and C)
F) A) and B)

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The more attributes there are in a sample data,the easier it is to build a model that fits the sample data,but that is worthless as a predictor.Which of the following best explains this phenomenon?


A) the free rider problem
B) the curse of dimensionality
C) the tragedy of the commons
D) the zero-sum game

E) A) and B)
F) A) and C)

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