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Variant has two purposes. First to determine which version of the question the student will see. Hence it is used to set up the state of the quetsion when the question is started. Then the internal state of the question is saved in the first step. Once that has been done, the variant number is purely informative, and just used to break down the statistics. In some cases (the one I have in mind is qtype_opaque) then there is a complex randomisation process, which may lead to several inital variant numbers acutally giving the same version of the question. In this case it is nice if the question can update the stored variant number, to make the statistics more meaningful.
QUICK INSTALL ============= For the impatient, here is a basic outline of the installation process, which normally takes me only a few minutes: 1) Move the Moodle files into your web directory. 2) Create a single database for Moodle to store all its tables in (or choose an existing database). 3) Visit your Moodle site with a browser, you should be taken to the install.php script, which will lead you through creating a config.php file and then setting up Moodle, creating an admin account etc. 4) Set up a cron task to call the file admin/cron.php every five minutes or so. For more information, see the INSTALL DOCUMENTATION: http://docs.moodle.org/en/Installing_Moodle Good luck and have fun! Martin Dougiamas, Lead Developer