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RAG vs fine-tuning

A team wants the model to answer questions about their internal docs, which change weekly. Should they use retrieval (RAG) or fine-tune? Explain the trade-offs.

20 minutes, for junior, mid-level, senior engineers

How the interview runs

  1. 1.Explain. Start with the core idea. How would you explain it to a teammate?
  2. 2.Go deeper. Go one level deeper. What actually happens, and where does it break?
  3. 3.Trade-offs. What would you do in practice, and what are the trade-offs?

What you're graded on

  • Right tool for the job30 pts
  • Mechanism explained30 pts
  • Depth and failure modes20 pts
  • Practical trade-offs20 pts

Practice this one for real

Answer it phase by phase, then get the rubric score, what you missed and the model answer outline.

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