two or more domain names pointed on the same host server

[alec11]

Friends, I have a doubt, suppose I bought a domain name and pointed the domain to my host say ns1.hostsitename.com; ns2.hostsitename.com;
Then again I bought a new domain, and pointed to the same host say ns1.hostsitename.com; ns2.sitename.com
I wonder what will be the outcome if I type the both domains on my browser? Hope someone help with it.

First, check your hosting provider status. Did they allow yo to host more than 1 site in 1 hosting package?
Usually, you can only change the main site for that hosting by contacting cust suport, not manually.