Tata Consultancy Services Sr. Software Engineer interview questions

Multiple Rounds of interview, Process wasn't clear. Improper communication. They don't respect your time. It happened literally 3 times. I joined the virtual interview using the link they sent me. There wont be anyone, I waited there for more than 20 mins to know that no one bothered to join nor inform me. And later i get the email saying your interview is rescheduled. This is ridiculous of them and audacity and never respect the candidates. They have a standard set of questions to test your ability to write software and each time the questions won't differ much.