Data Warehousing problems
- 1. A snowflake schema is which of the following types of tables?
Options- A. Fact
- B. Dimension
- C. Helper
- D. All of the above Discuss
Correct Answer: All of the above
- 2. Fact tables are which of the following?
Options- A. Completely denoralized
- B. Partially denoralized
- C. Completely normalized
- D. Partially normalized Discuss
Correct Answer: Completely normalized
- 3. An operational system is which of the following?
Options- A. A system that is used to run the business in real time and is based on historical data.
- B. A system that is used to run the business in real time and is based on current data.
- C. A system that is used to support decision making and is based on current data.
- D. A system that is used to support decision making and is based on historical data. Discuss
Correct Answer: A system that is used to run the business in real time and is based on current data.
- 4. The @active data warehouse architecture includes which of the following?
Options- A. At least one data mart
- B. Data that can extracted from numerous internal and external sources
- C. Near real-time updates
- D. All of the above. Discuss
Correct Answer: All of the above.
- 5. A goal of data mining includes which of the following?
Options- A. To explain some observed event or condition
- B. To confirm that data exists
- C. To analyze data for expected relationships
- D. To create a new data warehouse Discuss
Correct Answer: To explain some observed event or condition
- 6. The extract process is which of the following?
Options- A. Capturing all of the data contained in various operational systems
- B. Capturing a subset of the data contained in various operational systems
- C. Capturing all of the data contained in various decision support systems
- D. Capturing a subset of the data contained in various decision support systems Discuss
Correct Answer: Capturing a subset of the data contained in various operational systems
- 7. A data warehouse is which of the following?
Options- A. Can be updated by end users.
- B. Contains numerous naming conventions and formats.
- C. Organized around important subject areas.
- D. Contains only current data. Discuss
Correct Answer: Organized around important subject areas.
- 8. Data transformation includes which of the following?
Options- A. A process to change data from a detailed level to a summary level
- B. A process to change data from a summary level to a detailed level
- C. Joining data from one source into various sources of data
- D. Separating data from one source into various sources of data Discuss
Correct Answer: A process to change data from a detailed level to a summary level
- 9. The generic two-level data warehouse architecture includes which of the following?
Options- A. At least one data mart
- B. Data that can extracted from numerous internal and external sources
- C. Near real-time updates
- D. All of the above. Discuss
Correct Answer: Data that can extracted from numerous internal and external sources
- 10. Data scrubbing is which of the following?
Options- A. A process to reject data from the data warehouse and to create the necessary indexes
- B. A process to load the data in the data warehouse and to create the necessary indexes
- C. A process to upgrade the quality of data after it is moved into a data warehouse
- D. A process to upgrade the quality of data before it is moved into a data warehouse Discuss
Correct Answer: A process to upgrade the quality of data before it is moved into a data warehouse
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