Very long process but worth it if you get the job for me it was 4 rounds till i blow and you need to study well for each round the interviews are harder than what you get somewhere else

Very inefficient and unprofessional interview process. I applied online without a referral; my CV took one month to be reviewed, and I was invited to do a functional exam. After one week of my exams, they asked me to do an interview with HR within two days. It took them 6 months to reply that I am shortlisted, but there is no suitable position. After approximately one year, they invited me to an interview with hiring managers in the QA team. Although I updated the HR of my CV, during the interview with managers I was shocked that they were still having my old one. After one week, they invited me to a final interview with a higher manager. At first I asked her to change the time because my father is having a surgery; they said no. I took the chances, but the manager seemed to be so rude, arrogant, and not having the will to do the interview. She had a lot of negative energy and would like to doubt even my correct answers. After two months they sent me a regret letter.