I received a coding assessment in the first round.

It was through CodeSignal.

There were 10 questions and 70 minutes. The questions were not as hard as I thought they would be, but the time was extremely short.

Here's a breakdown of the assessment:

• 6 hard quiz questions with 4-6 True/False options (not necessarily from everyday ML algorithms).
• 1 medium LeetCode problem (from their list of most repeated questions).
• 2 implementation questions (e.g., KNN and K-means).
• One easy neural network hand-calculation.

Overall, the assessment was thorough, but the time limit is unreasonably low. As someone with tons of coding and ML experience, I would say you had to be in the top 10% of Stanford graduates to come close to getting all the questions right in 70 minutes.