Hi @sudarat-mda I am assuming you have selected ‘request response’ instead of ‘forced response’  in few of the questions that is why you are getting the pop up, “There are x unanswered questions on this page. Would you like to continue?”

If you select force response in all the questions, the respondent will be forced to answer all the questions and will be shown something like this, refer below image (instead of the pop up).

@omkarkewat, you are right. I reviewed all the questions and found there are one with the request response. Thank you!