Q. What role does internal data play in a data warehouse?

View solution

Q. How often is data typically archived from operational systems, and for how long can it be retained?

View solution

Q. What is the purpose of archived data in a data warehouse?

View solution

Q. Why is external data important in a data warehouse?

View solution

Q. How does external data typically differ from internal data in terms of format?

View solution

Q. How do organizations need to manage data transmissions from external sources?

View solution

Q. After data is extracted from various operational systems and external sources, what major functions need to be performed to prepare the data for storing in the data warehouse?

View solution

Q. Where do the major functions of data extraction, transformation, and loading take place?

View solution

Q. Why is a separate staging area necessary for preparing data for a data warehouse?

View solution

Q. In some cases, particularly with old legacy systems, what type of staging area might be required?

View solution

Q. What is the purpose of data extraction in the staging area?

View solution

Q. Why might a data warehouse implementation team choose to use in-house programs for data extraction instead of outside tools?

View solution

Q. Where is the source data extracted into after the extraction function in the staging area?

View solution

Q. What is the primary purpose of data transformation in the context of a data warehouse?

View solution

Q. Why is data transformation for a data warehouse more challenging than for an operational system?

View solution

Q. What is the primary objective of cleaning data during the data transformation process?

View solution

Q. What is semantic standardization in the context of data transformation?

View solution

Q. Which of the following is NOT a part of data transformation?

View solution

Q. Why are primary keys in a data warehouse different from those in operational systems?

View solution

Q. What does the data transformation function include when data needs to be summarized in the data warehouse?

View solution