Yes, but students should avoid choosing subjects without considering their academic strengths and potential university pathways.
If you are undecided, start by identifying subjects that interest you and that are useful across several possible degrees.
For example, Calculus may be relevant to Engineering, Mathematics, Economics and some Computer Science pathways. Biology and Chemistry may be useful for students considering Life Sciences, Biotechnology or Medicine.
You do not need to finalise your career before exploring APs. However, taking several examinations without a clear academic purpose may add workload without improving your applications.