You can use validation to force or request a respondent to answer a question. Validation can also be used for security and to make sure that the input is valid before respondents can proceed with the survey.
By default, validation for a question is switched off.
Yes, consider an example where you want to validate the employee code entered by an employee. To do so, first pass the employee code to the survey via custom variables. Now on the question, set the validation as Equals and select the custom variable.
This feature is available with the following licenses :