582+ practice questions from actual FDE loops, with answers that get offers.
Every question ordered easy → hard into a journey per topic. Written by engineers who sat the loops at the labs hiring right now. Browse the full set of Forward Deployed Engineer interview questions by topic and company.
Not sure that is where you should begin? Follow the map instead: the four stages of preparation, and where to join them given what you already know.
Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.
The content is the product.
A real, unlocked card from the RAG & Agents journey:Customer's RAG pipeline started hallucinating after a data refresh — debug it live
Resist the urge to touch the prompt. A data refresh changes retrieval, not generation — so measure retrieval before you theorize.
# golden set recall, before touching anything hits = retriever.search(q, k=20) print(recall_at_k(hits, gold)) # 0.31 — was 0.86
Recall cratered. The refresh re-ran ingestion but skipped re-embedding, so the index points at stale vectors.
Not a wall of answers. A system that learns how you learn.
Reading answers from an LLM is passive, and it forgets you the moment you close the tab. This is built on knowledge tracing, the same learning science behind the best intelligent tutoring systems. It quietly models how well you recall each topic and points you to exactly what to study next.
- ▸One tap after each answer (Got it / Shaky / Review) feeds a live mastery estimate per topic.
- ▸“Your next focus” sends you to your weakest area, not a random question.
- ▸Your mastery and journey persist, so every session builds on the last.
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All 582+ answers across 11 topics, ordered easy to hard, plus the full concept curriculum, for 6 months. One payment, no auto-renewal. Start free, no card needed.