Can a survey be just one question?
The one-question survey is simply a survey with just a single question. It could be any form of question, from dichotomous (yes/no) to multiple choice and open-ended. One of the obvious limitations of one question surveys is that organizations tend to want to know many things about their customers.
What is one question at a time?
When you design a survey using the one question at a time strategy, you present respondents with a single question on the screen. As soon as the user answers the question, the survey shows the next question. This eliminates the need to scroll down to view the next question.