Cognizant Full Stack Software Engineer interview questions

Interviewer came 20 min late for interview and completed the interview in 15 min and rejected me without a reason . How can someone judge in 15 min . At least give 30-45 min to express ourself and showcase our skills . Pathetic and unprofessional way to conduct interviews in CTS

Coding test followed by an interview. In the coding test, it is of Multiple choice questions, debugging, coding. The coding has 6questions, I guess. The interview is of behavioural questions and a problem to solve.