Self-mock 1: pick a Week-16 case and rework + DSA review

Interview questions to prep

1. Walk through your pointer hazards — what breaks if you lose track of the head or a prev pointer?
2. Can you do this in-place (O(1) extra space)? What's the trick?
3. How would you detect / handle a cycle, and prove your method's correctness?

Interview questions to prep

1. Walk me through your 7-step framework for any ML system design interview.
2. How do you avoid running out of time on the model section?

Interview questions to prep

1. What are the first five clarifying questions you ask in any ML system design interview?
2. How do you confirm the business metric vs the ML metric without burning 10 minutes on it?

Interview questions to prep

1. How do you map a business metric to an offline ML metric?
2. Walk through three real cases where offline gains didn't translate online.

Interview questions to prep

1. Walk me through designing TikTok's For You feed end-to-end.
2. How would you handle the cold-start problem for a new user?
3. What candidate-generation strategies would you use, and how do you combine them?

Interview questions to prep

1. Why do industrial recsys use a two-stage (recall + rank) architecture?
2. How do you avoid training/serving skew between recall and ranking?