"To answer the questionnaire" means to provide responses or provide information in a written or verbal format to the set of questions presented in the questionnaire or survey. Full definition
Parents answered a questionnaire about their child's mobile media use and then filled out a checklist designed to identify heightened risk of speech problems. (sciencenews.org)
Using the Internet to compare rates saves the hassle of calling companies individually and repeatedly answering questionnaires in order to get rates. (articles.onlineautoinsurance.com)
After answering our questionnaire, we will be able to work with you to suggest a great selection of clothes that are uniquely tailored to you. (theidleman.com)