30 min interview for a coding problem is cutting it close on time. 
How it was for me for an 11:00 am to 11:30 am interview 11:04 Finally interviewer called 11:06 Finally set up the coding challenge 11:24 End of Interview Total time for interview: 18 min. 
Things could have done better: * Send the coding challenge link ahead of time so no time is wasted. (Time flies when you are coding and thinking out a solution) * Have the interviewer call on time, so no time is wasted * I got stuck but the interviewer gave me a hint, which was an ok hint. I think I just brain farted worrying about time. Everything felt very rushed as if he didn’t want to interview me. Overall it was the shortest interview that I have ever had, but I did learn a lot through this interview.