The features of a gdb questionnaire are mentioned below.
1. The questionnaire should not be too long.
2. The number of questions should be as minimum as possible.
3. The series of questions should move from general to specific.
4. The questions should be precise and clear.
5. The questions should not be ambiguous, to enable the respondents to answer quickly, correctly and clearly.
6. If possible ask ‘yes’ or ‘no’ questions.
7. The question should not be a leading question, which gives a clue about how the respondent should answer.
8. The question should not indicate alternatives to the answer