Apple (Siri org)
- One coding tree traversal similar to serialize/deserialize tree.
- Dot product for sparse vectors
- One ML use case discussion: use case similar to detect spam vs non spam problem for iOS iMessage
- Some teams ask a lot of DL questions: what is local optimal, how to avoid local optimal etc.
- Similar to this question Design add and search word data structure.
- Similar to this question Shortest path in grid.
- Implement iterator similar to this question.
- Implement kmeans.
Stitchfix
- It's mostly discussion about one specific ML use case. Since Stitchfix core business is clothes recommendation, you should expect recommendation use case. It's important to focus how to build model on end to end, focus on evaluation, A/B testing etc. One way to practice to follow this structure.
- You can read more about Stitchfix interview here.
Airbnb
- Take home challenge: one of the use case that they explained in details in their engineer blog.
- You can read more about their onsite.
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