BCIS ex 3 ch 9
Which of the following statements is true of a data warehouse?
A data warehouse is larger than a data mart.
Which of the following statements is true of BigData?
BigData refers to data sets that are at least a petabyte in size
Which of the following statements is true of business intelligence (BI) systems?
Business intelligence systems analyze an organization's past performance to make predictions.
Users in a data mart obtain data that pertain to a particular business function from a ______.
Data Warehouse
Which of the following is true of business intelligence (BI) publishing alternatives?
Publishing dynamic BI is more difficult than publishing static content.
A ______ is a data collection, smaller than a data warehouse that addresses the needs of a particular department or functional area of a business.
data mart
A ______ is a facility for managing an organization's business data
data warehouse
A _______ is designed to extract data from operational systems and other sources, clean the data, and store and catalog the data for processing by business intelligence tools.
data warehouse
Problematic data are termed ________.
dirty data
Which of the following problems is particularly common for data that have been gathered over time?
lack of consistency
The _______ of business intelligence servers maintains metadata about the authorized allocation of business intelligence results to users.
management function
The source, format, assumptions and constraints, and other facts concerning certain data are called _______.
metadata
Which of the following is a fundamental category of business intelligence (BI) analysis?
reporting
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
Which of the following refers to data in the form of rows and columns?
structured data
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 the phenomenon?
the curse of dimensionality
