Q. Which data extraction method is applicable to all types of source data, including databases, indexed files, and flat files?

View solution

Q. Deferred data extraction techniques differ from immediate extraction techniques in that they:

View solution

Q. Which technique is based on date and time stamps to capture source records for extraction?

View solution

Q. What is a limitation of the Capture by Comparing Files technique?

View solution

Q. How does the Capture by Date and Time Stamp technique handle deleted source records?

View solution

Q. Which deferred data extraction technique may be considered a last resort for legacy data sources?

View solution

Q. What is the primary reason for using the static data capture technique when populating a data warehouse initially?

View solution

Q. Which technique is considered the most inexpensive for data extraction in terms of cost and overhead on source systems?

View solution

Q. In terms of performance impact on source operational systems, which techniques have the least impact?

View solution

Q. Which technique is recommended as the preferred option for dealing with transient source data while minimizing the impact on operational systems?

View solution

Q. When should the file comparison method for data extraction be used?

View solution

Q. What is the underlying principle of a data warehouse?

View solution

Q. Why is operational data not directly usable for strategic decision making in a data warehouse?

View solution

Q. What is one of the key challenges in data transformation when moving data to a data warehouse?

View solution

Q. What does data transformation in the context of a data warehouse involve?

View solution

Q. Why is it essential to consider data transformation functions seriously?

View solution

Q. What is the main focus of data transformation in a data warehouse?

View solution

Q. What is the first basic task in data transformation?

View solution

Q. When might you need to perform the selection task during data transformation?

View solution

Q. What is the purpose of the splitting/joining task in data transformation?

View solution