Question

what wull happen if yiu create a file with the same name which already exists

Answer 1

The newly created file with same name will get a Number at the end of its name.
If it is the same folder.
E.g. if a file (setup.exe) already exist and if you create a new file with same name then it would be like (setup1.exe) or (setup(1).exe).

Answer 2

if you create a file with the same name.. u may not able to recognize it ,when you open it later