How to know what mode of JQuery mobile am I using?
Is having data-role="page"
is enough of multi-page mode indication?
If you have several div with data-role='page'
in your html file you are using a multi-page template, on the other hand if you have only one you are using a single page template.
If you got a multi-page template your link to page2 is simply refering to the second page id :
<a href="#page2">go</a>