BlackRock Quantitative Analyst interview questions

After submitting an online cover letter, I received an offer to participate in an interview over the phone. I had two phone calls with different people and each took half an hour. This was fairly relaxed, with one or two technical questions.

Applied to an industrial replacement position for quantitative investing division. Was asked to complete a video interview and it was actually very easy. 5 minutes of preparation time given and 1.5 minutes to answer.