Hi,
I have a question regarding registering for a course in the 2nd semester.
If i take the prerequisite right now in the 1st semester, would i be able to register for the course that i want in 2nd semester right now? or is it that i have to finish the preq course this semester and then i am able to apply for that course in 2nd semester?

Yep, as long as you pass the pre-req course, you'll be approved to register for it.

well so the system just assumes that you will pass that prereq I will take in first sem? so i can register for that course in 2nd sem (which requires that prreq) that i want?