Tell me more about FAISS: how is the index structured, how is it deployed, and how does the end-to-end system work?
Machine Learning / AI
Tell me about the vacancy.
Why does the function return 0 when there is only one class in the sample?
Tell me, how does a reranker work — did you go into details or use it as a ready-made engineering brick?
How interesting would it be to delve into recommendation systems?
How is a two-level and double-headed recommender system organized and why is it needed?
Please tell us why you are currently looking for a job.
How did you choose the model for embeddings? Were there document filtering and reranking stages?
How do we deal with the fact that the old display policy may not be optimal, even when using propensity — propensity here won't help much?
Can you explain how off-policy evaluation works (for example, IPS or Double Robust) that you mentioned?
Explain briefly how the Double Robust approach differs from IPS — what is added and what makes it more robust and resilient?
Can you tell more? (about RAG system protection against hallucinations)
Can you explain in simple terms the difference between Recall and MRR?
Regarding the target minus one — how would this work theoretically in boosting? Suppose we have positive and negative, if we set the target for positive to 10 instead of one — will it change anything?
I don't understand why we can't do everything online — what are the real limitations here? Why is pre-calculation needed?
It seemed to us that in the middle of the interview you used an assistant when answering the theoretical question about LangGraph. Is that true or not?
Explain why a two-tower network helps solve the first level ceiling problem — how exactly does it do that?
What is collaborative filtering?
(After clarification from the interviewer) How to now formulate the task and approach, considering that item recommendations already exist, and you need to arrange blocks on the main page without content duplication?
Let's compare DAU, RPS, and QPS: if we have 10 million DAU and each user logs in 4 times a day, what will be the RPS and QPS?