If you are doing this for an Interview then i advice you to take time and study this stuff very well or you will mess up
There are so many ways to do this
If the host you have bought provides you with FTP accounts then you need those any of this
1. Open windows explorer and type
ftp://yoursite.com ,
==>when it opens , it might prompt for username and password but if it don't then u are in the site anonymosly which you actually can do nothin
==> click file ---> connect ---- then input username name and password.
==> when conected open the public_html folder and place you files there
==> Go to
www.yoursite.com and you are set.
Remember to include an index.html , index.htm on the public_html folder
2. Get a FTP software like Ip_switch ( this is prefer) and connect then transfer your files