For the Tableau Associate exam I would just recommend going through their exam guide (http://mkt.tableau.com/files/DesktopQA_ExamGuide.pdf). Tableau 9.0 contains Level of Detail calculations, which was new to that version, so you'll find that the exam should work with the old version. Tableau has changed a number of things since version 9, but you'll find the fundamentals to be the same and that's what the Associates exam is all about.
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