Cognizant Software Developer interview questions

asked around 50 questions from electronics and C programming. I answered almost every question, but i have less percentage in bTech. Iam rejected. During the interview process , he interviewer is not supportive. No common questions are asked . I am thinking I was rejected for having less accademics.

first day : they had an aptitude exam which has a set pattern, for preparation of this , do solve the online mock papers to get an idea , and the paper is lengthy so keep tracking ur speed. second day : we had a technical interview and once u are selected in the technical interview u are sent to hr interview.