are they really going to be able to test each of us on all 6 units? if yes, do the percentages for the makeup of the test for each unit (like unit one making up 10-15% of the exam ) still apply or is it all random?
Everything that you’ve learned about is connected in some way, which they use to test different concepts. This happens in the normal format as well, because they want to see the students make connections across units. So while they may not test, for example, unit 1 explicitly, you may have to draw upon the background knowledge in order to answer one of the parts. I would disregard the makeup of the test for this year, however.