Navigate to Setup and enter in “Site” into the Quick Find/ Search Box. Under the Sites and Domains secti,on you will see Sites and click on it.
On this page, there will be an open text box where you are able to enter in and create you Force.com domain. It is recommended that it is the same as your original one for continuity sake. After entering in the desired input you will click the Check Availability button and if it is available it will be generated. Once you have created this you are unable to change it so keep that in mind.
Now that you have generated a Force.com domain you are able to create a Public Site. To create a new Public Site you will click on New. This will bring you to a screen where you will fill out the information relating to the site you are creating. You will need to create a Site Label, set the page to Active, set the Active Site Home Page to PublicAssessmentPage, and set the ClickJack Protection Level to Allow Framing by any Page. After you have all that sorted out you will click Save.
Normally after you click save you get to be done but there is still one additional step to confirm that your public assessment URL will be properly working once you start associating assessments to it. We must still add to Visual Force pages to this site.
To add the visual force pages to the site you will scroll down until you see the Site Visualforce Pages section where you will click New. From here you will select ExAM.AMAndAnswerCreationPage and ExAM.AMPublicAssessmentHome and move them over to the right box and click Save.
Now that the site has been properly configured you will need to copy the Site URL and navigate to the ExAM Configuration tab.
Scroll down until you see Public Assessment URL Configuration. You will click on Edit Configuration and Paste the site URL here (make sure you add the “s” to http) and then click Save.
You have now successfully created and configured your Public Assessment URL.