How and which placement exams will we take during BCT? Also, when will these be? From my knowledge, they include chemistry, foreign language, mathematics? What and how are the tests like? What would be the case for someone who has taken higher level math courses at community college?

Everyone takes an algebra test to determine if one is ready to take Calculus. For those who have taken Calculus, there is an option to test into a higher version of it by taking the Calc 1 and Calc 2 tests.

So the only placement exams we take are for math? The rest I assume would be validated by AP scores/college credits.

Don't assume...read the Instructions to Appointees. There are at least three placement exams mentioned in there.

Yeah you definitely take more than just math. And if you've taken Spanish or German in high school than there is an additional online test you're supposed to take before I-day.

Other than the ones you listed, I remember there being a computer science test as well and this was sometime during the first week or so of basic (maybe beginning of week 2, I don't actually remember for sure).