Question

What will happen if you create a file with the same name which already exists?

Answer 1

If you were to create a same file that has the same name to it then your computer would recognize the file with the same name and will ask you whether you would like to replace the existing file or if you would like to make duplicate copy of the existing file.

You could choose to rename the file just to clear out any confusion that can take place in the near future.