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Users in a data mart obtain data that pertain to a particular business function from a ________. |
data warehouse |
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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. |
map |
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________ is the process of sorting, grouping, summing, filtering, and formatting structured data. |
reporting analysis |
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Which of the following statements is true of BigData? |
BigData refers to data sets that are at least a petabyte in size |
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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? |
the curse of dimensionality |
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________ are user requests for particular business intelligence results on a particular schedule or in response to particular events. |
subscriptions |
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The results generated in the map phase are combined in the ________ phase. |
reduce |
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Which of the following statements is true of a data warehouse? |
a data warehouse is larger than a data mart |
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Which of the following statements is true of business intelligence (BI) systems? |
business intelligence systems analyze an organization’s past performance to make predictions |
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The use of an organization’s operational data as the source data for a business intelligence system is not usually recommended because it ________. |
requires considerable processing and can drastically reduce system performance |
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________ is an open source program supported by the Apache Foundation that manages thousands of computers and that implements MapReduce. |
Hadoop |
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Which of the following is a fundamental category of business intelligence (BI) analysis? |
reporting |
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________ is an unsupervised data mining technique in which statistical techniques identify groups of entities that have similar characteristics. |
Cluster analysis |
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Which of the following refers to data in the form of rows and columns? |
structured data |
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________ is used to measure the impact of a set of variables on another variable during data mining. |
regression analysis |
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The goal of ________, a type of business intelligence analysis, is to create information about past performance. |
reporting analyses |
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Regression analysis is used in ________. |
supervised data mining |
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________ are business intelligence documents that are fixed at the time of creation and do not change. |
static reports |
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Which of the following problems is particularly common for data that have been gathered over time? |
lack of consistency |
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A ________ is designed to extract data from operational systems and other sources, clean the data, and store and catalog that data for processing by business intelligence tools. |
data warehouse |
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