633+ 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.
Updated · 633 questions added or revised in the last 30 days
Prefer to browse? Follow the map instead: the four stages of preparation, and where to join them given what you already know.
How ready are you for an FDE interview?
17 scenarios from real loops. Find the gap costing you most, and get a plan wired to real questions and lessons.
Which role are you actually going for?
Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.
ACCURACY YOU CAN AUDITEvery code sample, SQL query and worked number here is executed and checked before it ships, then re-audited. Find an error we can verify and we add a day of full access to your account.How we check, and what counts →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.
Reading answers is studying. Being tested is knowing.
408 multiple-choice scenarios across all 11 topics, easy to staff-level. Every answer explains itself and links into the worked material, and the questions rotate so a retake is a fresh test.
A RAG answer is wrong. Which single question splits the failure into its two bug classes?
If the passage never came back, no prompt work will help: fix retrieval. One log lookup separates the two bug classes…
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.
The part a chatbot cannot hand you.
Ask a model what happens when you call an LLM API and you get four paragraphs you have read before. Beside it is what we give you instead: every stage in order, the mechanism printed under each name, and the numbers annotated where you would otherwise have to take our word for it. 160 answers, concepts and lessons now carry one.
- ▸Drawn for the page it sits in, so it teaches that page rather than the topic in general.
- ▸Every figure on them is either executed while writing or marked illustrative. Nothing is decorative.
- ▸Light and dark, readable on a phone, and described in full for a screen reader.
The only structured curriculum we know of for the FDE job itself.
Certifications teach cloud architecture. AI courses teach models. Neither teaches the embedded, customer-facing half of this job, so we wrote it: 3 courses, 98 lessons, from your first discovery call to deployments behind an air gap.
- ▸Hands-on labs with runnable harnesses, and worked engagement documents: the scope doc, the pilot proposal, the security packet.
- ▸Each course ends in a capstone whose artifacts you can bring into an interview.
- ▸15 lessons are free, one click away, so you can judge the depth first.
Reading an answer and producing one are different skills. The loop tests the second.
Each work sample is a small broken thing from a real deployment, handed to you the way a customer hands it over: three symptoms in one ticket, no list of causes. You get the fixtures, a hostile server or a seeded database, and a grader you run locally. Nothing to install, no API key, no account on anything, and every dataset is synthetic and written for the exercise.
The tests going green is the smaller half. Each pack ends with the questions an interviewer asks next, and a reference solution that explains what was being scored rather than only showing the answer. This is the closest thing on the site to the job itself.
The State of Forward Deployed Engineering 2026
Why 95% of enterprise AI pilots produce nothing measurable, the role the market invented to fix it, and what the 2026 stack, economics and hiring loops actually look like. Sourced, and explicit about which numbers are contested.
Read it free with an account →
The first book on the FDE interview
Not the role in general. The loop: the decomposition round, the practical builds, the applied LLM work, and the customer rounds that decide more offers than anyone admits. Free for premium members on release.
What is inside the book →One payment unlocks all of it
All 633+ answers across 11 topics, the full concept curriculum, and all 3 courses, for 6 months. One payment, no auto-renewal. Start free, no card needed.
NEW · Premium now also includes The Forward Deployed Engineer Interview Book, free on release in November 2026.
launch price · regularly ₹4,000 / $50