installing test application object server will make any affection on the original AOS ?

hello every one

I am new user in Microsoft dynamics ax 2012, I begin preparing for a test environment with retail part, I have linked 1 POS(point of sale) and 1 test server as well then i joined them to the live domain(which have all company users and active servers) after that I start installing AOS with all required prerequisite, my question is: if i create separate db on test server then configure all the AOS configuration upon this db

1-any affection will occur on the (original AOS) and all client PC’s ?

2-is it possible to install STORE DB on POS machine ?

any replay or help would be highly appreciated