First round is the video interview and each question is timed and they will give you about 15 min to prepare and there are four questions. If prepared well, I think it will not be hard
I applied online. The process took 3 days. I interviewed at AlphaSights (Seattle, WA) in Oct 2017
Interview
First the emailed that they were interested in resume. Then it was a video interview, but you recorded yourself answering questions. Never spoke to real a person, not even through email. Kind of awkward.
I applied through college or university. The process took 1 week. I interviewed at AlphaSights (New York, NY)
Interview
I did the video assessment. It was really simple, only 4 or so questions (even though the idea of a video assessment is rather intimidating). The video assessment had pretty basic questions , which you could probably find on the internet somewhere.