Fairly easy.. I had to go through an online interview process. You could record your answers in this process. Mostly questions about your eligibility and background . There were two behavioral questions.
I applied online. I interviewed at Regeneron (Tarrytown, NY) in Jun 2017
Interview
The first round was an online interview in which you had to either record yourself or type your answer. Some of the questions gave you 30 seconds to read the question and think of an answer, while others you had unlimited time to think of an answer.