Hey Mahendra.

If you wish to take Rajasthan Judicial Service exam or Judiciary examinations for any state, then you can appear for the same in your final year of Law degree or after you have completed your law degree. Many students prepare for Judiciary exams during their law degree and attempt the paper in the final year/later. So you need to complete a regular law degree only which is recognised by Bar Council of India. Any distance or other such private law degrees are not recognised by the BCI now a days to mantain the standard of Legal Education.

Best of luck