Create a class where you can populate the question details and when you sets the question answer and there count you just need to set the answer property as selectedAnswerid value.
and in last you just need to loop all the question from property class and have to save the answer value depending on the employeeid and the QuestionId with selected AnwerId.
There is lots of change in your Querstion Population Code which you are storing now as DataTable as property in viewstate.
You need to modify it by creating one class wioth the properties as Questionid,QuestionDescription and answerselected property.
You just need to set the AnswerId when you select answer and continue for next question.
and in last youneed to save it according to your viewstate values.
