J'ai passé un entretien chez Dean Ventures (Princeton, NJ) en nov. 2013
Entretien
Basic quantitative questions and logic games. I was asked to calculate the expected number of turns it would take for a random walk around a square to return to its original position after one turn. It was largely informal but stressed logical thinking under pressure. Interview lasted about forty five minutes.
Questions d'entretien [1]
Question 1
The most difficult question was detailed previously. There is a random walker (moves one way with one half probability and the other way with one half probability) on the four corners of a square who can only travel to adjacent corners. One turn passes. What is the expected number of turns it takes to return back to the original corner?