Doctype - Relation - Child Doctype

I am creating questionaire using Frappe.
Here i create questions and want to publish, Having that published url n number of user can answer that questions.

I have one parent doctype and having child doctype to add questions choice.
If the user gives answer means it stores in the doctype right? how to get answers for the question and store it seperately using doctype ? Is it possible

Can you explain it a little bit more?