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. 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.






2. In general - ______________ are transformed to relations/tables by defining one relation for the object itself and another relation for each multivalued attribute.






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






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






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






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






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






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






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






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






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






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






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






14. Organizes and analyzes data as an n-dimensional cube. The cube can be thought of as a common spreadsheet with two extensions: (1) support for multiple dimensions and (2) support for multiple concurrent users.






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






16. Twice as likely to identify the important class (compared to avg. prevalence)






17. The _____ operation of two tables results in a single table with the same columns as the first table - and containing all rows that are in the first table merged with all the rows in the second table - minus any duplicate rows.






18. Are a data mining technology.






19. Which rule would you be violating - if you tried to delete a sales rep record - who currently has customers on file?






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






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






22. _________ 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.






23. An economic feasibility measure. So is Internal rate of return.






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






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






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






27. Information about tables in the database is kept in the _____.






28. The SQL command for deleting the Warehouse field from the Part table is _____.






29. ___________________ 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






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






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






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






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






34. A _____________ is a system-generated primary key.






35. 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 ________________.






36. 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






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






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






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






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






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






42. 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:






43. An ___________ relates two other objects.






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






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






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






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






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






49. ___________ determines exactly what level of detail constitutes a fact record.






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