The questionnaire is a list of questions given to respondents directly or indirectly. Questionnaires are an important aspect of research which consists of a series of questions to collect information from respondents.
Researchers usually use research questionnaires to collect data from respondents relatively quickly. Research questionnaires are the most effective tool for measuring behavior, attitudes, preferences, opinions and intentions of research responses.
Respondents only need to choose or answer a list of questions in the research questionnaire. Therefore, the research questionnaire can already be considered as a written interview which is determined based on the respondents' answers.