Your First Interview
Shouldn’t Be
Your First Interview
A flight simulator for technical interviews. It won’t stroke your ego: expect follow-ups, curveballs, and a report on what actually needs work. Sweat here so the real thing feels easy.
Watch a session run.
Interview types
Work through a problem out loud, then turn your thinking into code. Catch the edge cases and explain how well your solution scales.
Answer grounded questions on fundamentals, neural nets and generative models — or take an ML system design case and show how it survives production.
Get an open-ended system problem and defend your design as the interviewer pokes holes in it.
The customer gives you a half-formed problem. Your job is to work out what they actually need, then get to something you could ship.
Why it feels like the real thing.
Your first answer is only the start. We’ll ask why you chose it, then change the input and see what you do next.
Just as you settle in, the problem shifts. The data starts streaming, a region goes down, or the scale jumps tenfold.
Doing well? We’ll raise the bar. Stuck? We’ll give you room to think—like a good interviewer reading the room.
Feedback that tells you the truth.
busiest-hour
Problem-solving carried it. Edge cases trailed behind.
Two clarifying questions, then a clean plan before any code.
Ties and empty input surfaced only after a nudge.
Another medium problem, same topic
Graph fundamentals held up. Edge-case discipline is the gap versus what they expect.
Proof you’re getting better
Every session can earn a badge. Solve without hints for Solo Solver, derive your solution from first principles for Reasoner and more.
Edge cases and boundary conditions.
Score 4+ on edge cases in 3 of your last 6 interviews.
Read against the rubric they publish.
Preparing for Google? Meta? Citadel? We rescore the same interview using the criteria that company publishes.
Built from each company’s publicly published interview guidance. preproom is not affiliated with, endorsed by, or partnered with any of them, and a practice report is not a hiring prediction.
- Meta
- Microsoft
- Palantir
- Bloomberg
- Jane Street
- Hudson River Trading
- Citadel
- Two Sigma
- Databricks
- Amazon
Land your 6 figure job, for the price of takeout!
Cancel whenever. First interview free.
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Practice on Preproom.
The unpleasant reps happen in here. The real room will feel easy.
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