Phone Interview-
The interviewer had a standard set of questions and was only looking for your ability to reply as soon as possible. No need to panic. They are in hurry, so you may feel as if they are not listening to you, but they are! Do not expect cross questions.
The interview process is extremely streamlined and they always keep you at ease right after your confirmation for on-site interview! Recruiters stay in touch with you through mails for scheduling interview, booking tickets, and suggesting websites/books to prepare. You can take a chance to postpone the interview. You would never feel stressed. Just concentrate on Data Structures! The best interview experience you can get.
1:1-
3-5 interviews including a lunch. If you reach the fourth interview, chances are that you would be selected.
Interviewers focus on your ability to question, discuss and analyze the problem. You won't be able to code the question completely in the given time frame, so do not panic. Just discuss the solution at your best! Ask the interviewers for feedback at the end of interviews. Implement the suggestions in next interview.