Zocdoc Full Stack Software Engineer interview questions

1 round Skype screen interview, 4 round onsite interview (1 hr /each). Applied online, good experience for phone screen interview, not push. HR mentioned that onsite interview takes 4 hours and began at 10, but what he or she did not mentioned is that there is no lunch time for you between the first two rounds and last two rounds, which means that you have to interview for 4 hours without having a lunch. Most of the company will allow the interviewer to have lunch and continue the interview process after that, but it seems really different in zocdoc hiring process. And it did not notify the candidate about that.