The questionnaire is a series of questions that used to collect the facts or opinions from the respondents. The form of the questionnaire can be various, such as face to face, by telephone or on the Internet. The questionnaire has many advantages comparing with other methods of research. It can be cheap, efficient and quick to obtain pretty amounts of information. Thus, it reduces the time of collecting the data and accelerates the process of research. For your reference, we offer some free questionnaire samples on our website, for example, Patient Questionnaire for Doctors, Non-resident Questionnaire, Student Questionnaire.