Assign 7 - Onlinemid

 1. What are the two major challenges in the problem of text analysis? 

2. What is a reverse index? 

3. Why is the corpus metrics dynamic. Provide an example and a scenario that explains the dynamism of the corpus metrics. 

4. How does tf idf enhance the relevance of a search result? 

5. List and discuss a few methods that are deployed in text analysis to reduce the dimensions.  APA, with Scholarly references.