I applied through college or university. The process took 1 day. I interviewed at Pindrop (Atlanta, GA) in Feb 2019
Interview
They had 3 sets of rounds: The first was on machine learning concepts, 2nd was on white board coding and third included discussion about my academic and research projects. The interview were conducted for half hour each.
Interview questions [1]
Question 1
Machine learning concepts: Unsupervised v/s supervised, overfitting, underfitting, performance metrics, choice of algorithm for any application