A set of printed or written questions with a choice of answers, devised for the purposes of a survey or statistical study.
Students were asked to fill out a questionnaire(=answer it).
Researchers distributed a questionnaire to gather opinions on the new policy.
Completing the health questionnaire was a prerequisite for admission to the clinical trial.
The survey included a comprehensive questionnaire to assess public opinion.
Respondents diligently filled out the questionnaire, providing valuable data for the study.