Test your basic knowledge |

Data Warehousing

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. A schema where dimensions are only connected to facts






2. Draws data from operational or external systems






3. Unlike independent data marts the marts are linked via middleware






4. simplest and least costly architecture developed to operate independently of each other - poor solution






5. Most famous data warehouse where a maintable infastructure includes a centralized data warehouse that serves for the needs of all organizational units (most favored 39 percent)






6. Third stage of the data warehouse data architecture design process






7. Take data from a source system






8. Import data into a new database






9. Splitting data tables into smaller tables for efficient access.






10. A group of conformed dimensions






11. Look-up tables referred to by fact tables






12. Data accessible to the whole data warehouse






13. A simplified form of a data warehouse supporting the work of a single line of business






14. Issues to consider when deciding EDW architecture: 1. Which database management system (DBMS) should be used? (ex: Crash Data" MS SQL) 2. Will ______________________ be used? 3. Will data migration tools be used to load the data warehouse?4. What too






15. Dimensions which are shared by two or more facts






16. An operational system that provides data for a business information system






17. A single low-level fact representing a single business operation






18. Fourth stage of the data warehouse data architecture design process






19. Requesting information about related facts






20. Used to support day-to-day operations






21. First stage of building a data mart






22. A daily snapshot for each day of a set period






23. Allows multiple CPUs to process multiple queries simultaneously - providing scalability.






24. The level of detail required for a fact to be useful






25. A logical design technique that presents data in a way that is optimised for high-performance access






26. A report created by an IT department user






27. An alternative term for a data warehouse






28. Online Analytical Processing






29. A schema where dimensions may be connected to facts or to other dimensions






30. Second stage of building a data mart






31. Extract - Transform and Load






32. A computer system used to support the day-to-day operations of an organisation






33. Tables containing summary records calculated from the main fact tables






34. Data about the data






35. A system that allows people to access and analyse data for business management and performance improvement






36. A synonym for Business Intelligence






37. A visual display of the most important information needed by a particular user






38. A database table that maps (e.g.) manufacturing product IDs to sales product IDs






39. Make changes to data so that it is compatible with a new database






40. The operational systems - data warehouse and data marts






41. Business applications - methods and tools that support the caputre and use of master data






42. Extract - Load and Transform






43. All database architectural fall into one of these two categories: EDW or _________ (independent data marts - data mart bus architecture - hub and spoke architecture - centralized data warehouse - federated data warehouse)






44. Fourth stage of building a data mart






45. A query created by a BI user






46. The business applications






47. A tool that allows users to write queries without having to learn SQL






48. A summary record for a specific reporting period






49. A group of related fact tables






50. These extend BI into automating and optimising processes