1. Which (select only one letter) of the following statements are true about The Curse of Dimensionality (TCD):
2. The TCD tells us that, as we add more data to the data mart (e.g. the new and changed data that we incrementally load with ETL on a daily or weekly basis), data mining will become exponentially more complicated
3. The TCD tells us that, if we reduce the number of stored aggregates (AGGs), our data mining will be faster and less complicated
4. The TCD is not affected by the number of dimension hierarchies (HIERs)
5. The TCD is not affected by the number of dimension levels (LVLs)

B-01 ANSWER: ____________________

2. 
   
3. Which (select only one letter) of the following statements are true about Domain Studies and Cross Footing:

1. Cross-Footing is a c(i.e. best practices say we should do Cross-Footing instead of Domain Studies)
2. Domain Studies involves analyzing the values in a data system, before during, and/or after ETL has been performed
3. Cross-Footing is done before performing ETL (not during or after ETL)
4. Domain Studies is a technique that analyzes the ETL processes, evaluating the execution time and amount of CPU used during ETL

B-02 ANSWER: ____________________