From LimeSurvey Manual
Revision as of 13:50, 10 May 2019 by Han (Marked this version for translation)
This option allows the survey administrators to request their respondents to answer to certain survey questions. If the mandatory questions are not answered, the respondents will not be able to proceed further. If you have a question with multiple subquestions and you require only certain subquestions to be answered, use the minimum answer attribute located under the Logic tab.
- Off (default)