Questionnaire radio button

I want to connect questionnaire radio buttons to database fields. Which will be the type of the fields (boolean?) and what i ll see in the database fields when someone fills up the questionnaire? Many thanks!

@ibletsos use a text field for radio buttons. You will see the actual answers that users submit in the database (the radio button choices).
Here is a pretty good video that explains how to set this up. The dropdown field shown (position) is similar to the radio button. in the video he links it to a tags field, but then corrects the mistake and links to a text field.

hope this helps