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MCQs

Total Questions : 64 | Page 6 of 7 pages
Question 51. . 
We have been given access to the company's operational data, and have been asked to produce a report. We discover that some of the data we need are in an SQL server database while other needed data are in a separate Oracle database. This is an example of ________ .
  1.    dirty data
  2.    inconsistent data
  3.    non-integrated data
  4.    a "wrong format" problem
 Discuss Question
Answer: Option C. -> non-integrated data
Question 52. . Data mining applications are used accomplish which of the following tasks?
  1.    Process transactions only
  2.    Do RFM analysis only
  3.    Do what-if analysis only
  4.    Do both RFM and what-if analysis
 Discuss Question
Answer: Option C. -> Do what-if analysis only
Question 53. . Which of the following is an unsupervised data mining technique?
  1.    Cluster analysis only
  2.    Regression Analysis only
  3.    RFM Analysis only
  4.    Both Regression Analysis and RFM Analysis
 Discuss Question
Answer: Option A. -> Cluster analysis only
Question 54. . In OLAP, we are interested in ________ .
  1.    levels only
  2.    dimensions only
  3.    measures only
  4.    measures and dimensions
 Discuss Question
Answer: Option D. -> measures and dimensions
Question 55. . We have done an RFM analysis on our customer data. Mary Jones has a score of "1 1 5". This series means that Mary ________ .
  1.    Has ordered recently, orders frequently, and places a large order when she orders.
  2.    Hasn't ordered recently, orders infrequently, but places a large order when she orders.
  3.    Has ordered recently, orders frequently, but doesn't place a large order when she orders
  4.    Hasn't ordered recently, orders infrequently, and doesn't place a large order when she orders.
 Discuss Question
Answer: Option C. -> Has ordered recently, orders frequently, but doesn't place a large order when she orders
Question 56. . We have Market Basket data for 1,000 rental transactions at a Video Store. There are four videos for rent -- Video A, Video B, Video C and Video D. The probability that Video D will be rented given that Video C has been rented is known as ________ .
  1.    the basic probability
  2.    support
  3.    lift
  4.    confidence
 Discuss Question
Answer: Option D. -> confidence
Question 57. . One popular classification technique in Business Intelligence (BI) reporting is ________ .
  1.    cluster analysis only
  2.    regression analysis only
  3.    RFM analysis only
  4.    both cluster analysis and regression analysis
 Discuss Question
Answer: Option C. -> RFM analysis only
Question 58. . Which of the following is not a reason that operational data are difficult to read?
  1.    Non-duplicated data
  2.    Dirty data
  3.    Missing values
  4.    Non-integrated data
 Discuss Question
Answer: Option A. -> Non-duplicated data
Question 59. . Which of the following is an unsupervised data mining technique?
  1.    Cluster analysis only
  2.    Regression Analysis only
  3.    RFM Analysis only
  4.    Both Regression Analysis and RFM Analysis
 Discuss Question
Answer: Option A. -> Cluster analysis only
Question 60. . In OLAP, we are interested in ________ .
  1.    levels only
  2.    dimensions only
  3.    measures only
  4.    measures and dimensions
 Discuss Question
Answer: Option D. -> measures and dimensions

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