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1. What are the two major challenges in the problem of text analysis? (7 points)
2. What is a reverse index? (7 points)
3. Why is the corpus metrics dynamic. Provide an example and a scenario that explains the dynamism of the corpus metrics. (7 points)
4. How does tf idf enhance the relevance of a search result? (7 points)
5. List and discuss a few methods that are deployed in text analysis to reduce the dimensions. (7 point)

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