hi,

see all of the work position you have mentioned is different slightly from one another and it depends on the organizations and the work load may differ as per organization wise. so it can not be predicted which of the course would bring a good salary, as a fresher you may expect 3.5-4 lpa job in any of the discipline. but the candidates who are well versed in programming and belongs to top institute like vit vellore, nits , JU may brags 6lpa + package at the starting of career.

so work on your skill and practice every day.