Database Processing For Bis(Engineering > Computer Science And Engineering > Database System ) Questions and Answers

Question 1. A BI reporting system does not ________ .
  1.    create meaningful information
  2.    use statistical procedures to predict future events
  3.    use disparate data sources
  4.    deliver information to users on a timely basis
Explanation:-
Answer: Option B. -> use statistical procedures to predict future events
Question 2. Which of the following are not done by Business Intelligence (BI) systems?
  1.    Process and record transactions only
  2.    Analyze past and current activities only
  3.    Neither of the above is correct.
  4.    Both of the above are correct.
Explanation:-
Answer: Option A. -> Process and record transactions only
Question 3. The "curse of dimensionality" relates to which problem of using operational data for BI reporting?
  1.    Too much data
  2.    Non-integrated data
  3.    Inconsistent data
  4.    Dirty data
Explanation:-
Answer: Option A. -> Too much data
Question 4. Business Intelligence (BI) systems do not obtain their data by which of the following means?
  1.    Read and process data from an operational database
  2.    Process data purchased from data vendors
  3.    Process transactions
  4.    Process extracts from operational databases
Explanation:-
Answer: Option C. -> Process transactions
Question 5. A report generated by a reporting system is delivered to the appropriate users via a user-accessed Web site. This system uses which of the following report modes?
  1.    RFM
  2.    Push
  3.    OLAP
  4.    Pull
Explanation:-
Answer: Option D. -> Pull
Question 6. RFM analysis uses customer's purchasing patterns to ________ .
  1.    record transactions
  2.    analyze and rank customers
  3.    perform OLAP
  4.    predict future sales using regression techniques
Explanation:-
Answer: Option B. -> analyze and rank customers
Question 7. Business Intelligence (BI) reporting systems cannot do which of the following operations?
  1.    Filter data
  2.    Modify data
  3.    Group data
  4.    Both filter and group data
Explanation:-
Answer: Option B. -> Modify data
Question 8. We have Market Basket data for 1,000 rental transactions at a Video Store. There are for videos for rent -- Video A, Video B, Video C and Video D. The probability that both Video C and Video D are rented at the same time is known as ________ .
  1.    the basic probability
  2.    support
  3.    lift
  4.    confidence
Explanation:-
Answer: Option B. -> support
Question 9. The "F" in RFM analysis stands for ________ .
  1.    freshness
  2.    frequently
  3.    fast food
  4.    fantasy
Explanation:-
Answer: Option B. -> frequently
Question 10. Which of the following is not a component of a data warehouse?
  1.    Data extraction/cleaning/preparation programs
  2.    None of these
  3.    Data warehouse data
  4.    Data metadata
Explanation:-
Answer: Option D. -> Data metadata
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