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- Question
The "curse of dimensionality" relates to which problem of using operational data for BI reporting?
Options- A. Dirty data
- B. Inconsistent data
- C. Too much data
- D. Non-integrated data
- Correct Answer
- Too much data
- 1. 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 ________ .
Options- A. the basic probability
- B. support
- C. lift
- D. confidence Discuss
- 2. Business Intelligence (BI) systems do not obtain their data by which of the following means?
Options- A. Read and process data from an operational database
- B. Process transactions
- C. Process extracts from operational databases
- D. Process data purchased from data vendors Discuss
- 3. With XML:
Options- A. views are not limited to one multi-valued path only.
- B. documents can automatically be generated from database data only.
- C. database data can automatically be extracted from XML documents only.
- D. With XML, all of the above are true. Discuss
- 4. An XML component that defines the structure of a document is known as a(n):
Options- A. DOCTYPE.
- B. DTD.
- C. #PCDATA.
- D. HTML Stylesheet. Discuss
- 5. The expression FOR XML RAW tells SQL Server to:
Options- A. place the values of the columns as attributes in the resulting XML document.
- B. place the values of the columns into elements rather than attributes.
- C. place some columns into elements and others into attributes.
- D. None of the above is correct. Discuss
- 6. Which of the following is not a component of a data warehouse?
Options- A. Data extraction/cleaning/preparation programs
- B. Data warehouse data
- C. Data metadata
- D. None of the above are data warehouse components. Discuss
- 7. 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 ________ .
Options- A. dirty data
- B. inconsistent data
- C. non-integrated data
- D. a "wrong format" problem Discuss
- 8. Which of the following is not a reason that operational data are difficult to read?
Options- A. Non-duplicated data
- B. Dirty data
- C. Missing values
- D. Non-integrated data Discuss
- 9. RFM analysis uses customers' purchasing patterns to ________ .
Options- A. record transactions
- B. analyze and rank customers
- C. predict future sales using regression techniques
- D. perform OLAP Discuss
- 10. Which of the following are not done by Business Intelligence (BI) systems?
Options- A. Analyze past and current activities only
- B. Process and record transactions only
- C. Both of the above are correct.
- D. Neither of the above is correct. Discuss
Database Processing for BIS problems
Search Results
Correct Answer: confidence
Correct Answer: Process transactions
Correct Answer: With XML, all of the above are true.
Correct Answer: DTD.
Correct Answer: place the values of the columns as attributes in the resulting XML document.
Correct Answer: Data metadata
Correct Answer: non-integrated data
Correct Answer: Non-duplicated data
Correct Answer: analyze and rank customers
Correct Answer: Process and record transactions only
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