Test your basic knowledge |

Data Mining

Subject : it-skills
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. An economic feasibility measure. So is Internal rate of return.






2. Useful for assessing performance in terms of identifying the most important class. Helps such choices as: How many tax records to examine; How many loans to grant; How many customers to mail an offer






3. Which data mining technique utilizes linkage analysis to search operational transactions for patterns with a high probability of repetition?






4. The term _____ has been generally agreed to represent the broadest category of software technology that enables decision makers to conduct many dimensional analysis of consolidated enterprise data.






5. The minimum cardinality and m is the maximum cardinality Cardinalities in Semantic Objects are shown as subscripts in the format n-m where _____






6. A synonym for data mining






7. The process that records how data from operational data stores and external sources are transformed on the way into the warehouse is referred to as ________________.






8. Which statement will take away user privileges to the database?






9. Semantic object link (SOL) attributes establish a relationship between one _______ and another.






10. To create the primary key clause for the Customer table on the CustomerNum field - which of the following is the correct statement?






11. To add a new row to a table - use the _____ command.






12. Which function calculates the number of entries in a table?






13. Which of the following database design and data warehouse design approaches is viewed to take a more strategic rather than operational perspective?






14. The term "ETL" in data warehousing stands for: Extraction - ________________________ - & Loading.






15. Which of the following is at the center of a star schema?






16. 'Signatures' are used for intrusion detection by _______?






17. An ___________ relates two other objects.






18. __________ occurs when the initial scope of a project continues to expand as new features are incorporated into the project.






19. This is not considered one of the four major categories of processing algorithms and rule approaches.






20. Increased affordability of ____________ is a reason for the growth in popularity of data mining.






21. Gives an idea of systematic over- or under-prediction. Magnitude of average absolute error.






22. A compound semantic object is an object that contains at least one ____.






23. The set of activities used to find new - hidden - or unexpected patterns in data is referred to as _____.






24. When an entity has a minimum cardinality of one it means the entity is required in _______.






25. Which function should be used to calculate the total of all entries in a given column?






26. Models that do ___________: MLR; KNN; Regression and Classification Trees; ANN; SVM






27. Gives us an idea of the magnitude of errors. Actual value - estimated value.






28. Which statement removes the table Salesrep from a DBMS?






29. ___________ is not a characteristic of a data warehouse.






30. The deletion of a record that also deletes related records is referred to as a(n) _____.






31. ____________ would not normally be associated with ROUTINE data warehouse maintenance.






32. Which clause would be used to create groups of records?






33. The SQL built-in functions - which may appear on the same line as the SELECT statement (before the FROM clause) are called _____ functions.






34. The product of two tables is also called the ________ product.






35. On an ER Diagram the number (mark) on relationship line that is farthest away from each entity (rectangle) represents the _______ cardinality.






36. You can save the results of a query as a table by including the _____ clause in the query.






37. An analytical-oriented organizational structure is a data warehouse _____________.






38. A common example of the use of association methods where a retailer can mine the data generated by a point-of-sale system - such as the price scanner you are familiar with at the grocery store is referred to as:






39. ___________________ is used to relate one set of outcomes (dependent variable) to a set of predictor (independent) variables (e.g. - in time series analysis). Through this analysis we attempt to predictive future events - as the dependent variables b






40. A single column that you create for an entity to serve as the primary key - because you otherwise would need many concatenated columns to do so - is called a(n) ____________.






41. _________ seeks to ensure that each application under development is fully integrated within its own boundaries and to eliminate any inconsistencies in the final software product.






42. The ACCESS feature that tests to see if your tables are normalized properly is the ____.






43. Within most organizations - the person known as the _____ determines the type of access various users can have to the corporate or enterprise database.






44. A ___________ combines result sets from more than one fact table.






45. The process by which numerical data is converted into graphical images is referred to as:






46. An alternative to the data warehouse concept is a lower-cost - scaled-down version referred to as the _____________.






47. Are a data mining technology.






48. These are considered an alternate storage techniques for data warehousing include.






49. Why are Star Schemas so useful in Financial Planning and Accounting Information Systems?






50. A powerful trend in IT is known as - which maintains that Computer transmission speed doubles every 18 months.