The role of the ETL process is to identify erroneous data and to fix them.
A. True
B. False
Answer: Option B
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Data scrubbing is which of the following?
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
The @active data warehouse architecture includes which of the following?
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
A goal of data mining includes which of the following?
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
An operational system is which of the following?
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.
ETL is a process in Data Warehousing and it stands for Extract, Transform and Load. It is a process in which an ETL tool extracts the data from various data source systems, transforms it in the staging area and then finally, loads it into the Data Warehouse system