After publishing a Questionnaire Survey an admin opens up the Surevy in edit mode, selects the Questions tab and the question type is no longer able to be updated.
SuccessFactors Learning Management System (LMS) - All Supported Versions
Once a survey has been sent to a user and completed, the question type field cannot be changed. This is working as intended.
Create a new survey from the copy of the one you want to edit, and publish it as a new survey.
Core Learning, Questionnaire Survey, survey, question , KBA , LOD-SF-LMS-PQE , LMS Plateau Question Editor and Evaluation , LOD-SF-LMS-ADM , Admin Tools , Problem