DeltaX has a 3 round hiring process in which 1st was technical and aptitude with moderate difficulty 2nd was coding round having 5 questions in which 2 easy questions 2 moderate level questions and 1 hard question. And 3rd round was technical interview.

In first round there was an aptitude test. Technical interview in second round and HR interview in third round. In aptitude test most of the questions asked were on c language. I think this company selects very few candidates.