How to use sub domain to appear just like the domain

Question

I have purchased a domain and i have options to create multiple sub domains Now I want to Create a sub domain and host my site there just like www.ABC.com/Subdomain now i want to make it just like www.Subdomain.com either to park the actual url to that one by any option can any one share the information about how to do that or is it possible i have shared hosting account