You may allow the respondents to edit their surveys by enabling the survey Response Editing option from collector settings or turn it off to prohibit them from changing their responses.

These are the design & character limits of the survey to keep in mind in creating your surveys.

If you're supposed to take an online survey but you don't have the survey link or URL, contact the survey creator who asked you to take the survey to send you the survey link or the URL.

When you clicked on a survey link and saw that responses had already been selected or submitted, then the Response Editing option has been enabled in the survey and the Multiple Responses has been disabled in Answer Editing.

The anonymity of the responses will depend on the preference of the survey-makers. They can choose whether to collect responses anonymously or to track respondents.