Ace Your Jane Street Interview
Practice orderbook trading and probability with randomized questions, step-by-step solutions, and encouragement every step of the way.
Quick Practice
Got 2 minutes? Practice one random question instead of scrolling social media. Mobile-friendly and perfect for learning on the go! ⚡
Orderbook Test
Master market making, spreads, liquidity, order matching, and arbitrage. Build your intuition for how markets actually work.
- Bid-ask spreads & market impact
- Market making P&L scenarios
- Order execution & VWAP
- Cross-exchange arbitrage
Probability Test
Sharpen your probabilistic thinking with expected value, game theory, and classic probability puzzles.
- Expected value & Kelly Criterion
- Conditional probability & Bayes
- Combinatorics & counting
- Classic puzzles & paradoxes
Wednesday Quiz
Static exam covering 6 fundamental order book concepts with detailed multi-part questions. Perfect for comprehensive assessment!
- 20 questions covering 6 concepts
- Liquidity exhaustion & FIFO
- Spreads & price improvement
- Queue priority mechanics
Wednesday Probability
Static exam covering 5 fundamental probability concepts with detailed explanations. Perfect for mastering core probability skills!
- 5 questions covering key concepts
- Hypergeometric & geometric distributions
- Conditional probability & inclusion-exclusion
- Compound events & counting
Final Exam
Comprehensive exam combining order books, probability, and business logic. Put all your skills to the test!
- 12 questions (numerical & text input)
- Module A: Order book (4 questions)
- Module B: Probability & logic (4 questions)
- Module C: Business logic & data (4 questions)
Learn, Don't Just Practice
Step-by-Step Solutions
Every question includes detailed breakdowns showing exactly how to solve it.
Common Mistakes
Learn what NOT to do - we highlight typical errors to avoid.
Pro Tips
Real trading insights to help you think like a Jane Street trader.
New: Jane Street Interview Prep Tutorial
Based on Jane Street's official "Probability & Markets" guide
Master probability, expected value, conditional probability, market making, and adverse selection with our comprehensive interactive tutorial. Learn the concepts that Jane Street traders use every day!
Remember: every expert was once a beginner. Aiyo, don't worry — Papa is here to guide you every step! 🌟