A questionnaire is a research instrument used to collect information from individuals on a wide range of topics. Questionnaires typically consist of a series of questions that are designed to elicit specific information or opinions from respondents.

Questionnaires can be used for a variety of purposes, including research studies, market research, and customer satisfaction surveys. They can be administered in a variety of ways, including through online surveys, paper-based surveys, and in-person interviews.

When designing a questionnaire, it is important to consider a number of factors, including the research question or objective, the target population, and the type of data that is being collected. Questions should be clear and concise, and response options should be well-defined and easy to understand.

There are several advantages to using questionnaires as a research instrument. They are a cost-effective and efficient way to collect data from a large number of participants. They also allow researchers to collect a wide range of data on a variety of topics, and they can be used to gather both quantitative and qualitative data.

However, there are also limitations to using questionnaires. Respondents may not always provide accurate or truthful responses, and there may be biases in the way that questions are phrased or presented. Additionally, questionnaires may not capture the complexity of individual experiences, as they tend to rely on pre-defined response options rather than open-ended responses.