Applied online. First had a short phone conversation with a recruiter. I learned that most of the data science team are in India office. The Bay area data acience team doesn't have a manager yet! Next I had a 1-hour technical phone interview. The interviewer was a data scientist. She was very incompetent. She didn't know that ppv/sensitivity are the same as precision/recall!! There was a coding question in Python. Given an array of integers, reorder the elements such that non-zero element are in the beginning maintaining their orders followed by zeros. I was not supposed to use any other array in the code. I wrote a code that would look over elements and put any nonzeo element in the next available index then incrementing the index. Once all elements are visited, the code would fill all the elements after the last index by zeros. The interviewer was surprised and said she expected me to use two indices, one for non-zero and one for zero elements. It was possible but obviously an overkill.