Coding challenges, brainteasers, and trading MCQs sourced from real interviews at Citadel, Jane Street, Two Sigma, and other top firms.
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A sample of the 1,000+ question library, grouped by the three quant career tracks. Every question links to a practice page with a code runner or answer checker. Use the filters above to browse the full bank by topic, firm, and difficulty.
C++ and Python coding challenges: low latency, concurrency, data structures, and systems.
Probability, statistics, machine learning, and time-series problems in Python.
Probability MCQs, brainteasers, market making, and options questions.