Deloitte Senior Java Consultant interview questions

It took 3-4 weeks to schedule the interview. But interview was taken very unprofessionally. Interviewer joined meeting 30 min late and finished interview in just 5-7 min. He asked me only 2-3 questions and even after giving correct answers he took only 5 min. Very unprofessional behaviour, I didn’t expect from Deloitte. Just thinking how unprofessional people in this organisation.