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Optiver Interview Question Bank

Optiver is a market-making trading firm whose interview process is built to find fast, calibrated decision-makers under pressure. The funnel is dominated by a heavy online assessment — a probability/sequence/reaction battery for quant roles and OOP simulation coding for engineers — and the quant loop centers on a live EV betting game where speed and bet-sizing matter more than ending profit.

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Last updated 2026/7/20

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Beat the Odds — Probability Test

The signature Optiver quant assessment: 30 multiple-choice probability questions, ~90 seconds each, no going back. You pick the answer closest to the true value, so speed and estimation matter more than exact computation. Wrong answers are penalized.

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OJ Problems

practice in the online judge

27 total

Days Between (Unbounded Date Range)Overheat Prevention Controller Single-Symbol Order Book Price Levels Construct Binary Tree from Parent-Child Pairs and Return S-Expression Number of Days Between Two Dates Thread-safe Stock Buy/Sell API Preventing Oversell Merge Overlapping Intervals Minimum Eating Speed to Finish Bananas Giving Tree of Errors: Validate Parent-Child Pairs and Output Lexicographically Smallest S-Expression Days Between Dates (Days Between 3.0 V2)Transport Scheduling System Design a Circular Queue Optimize Cargo Transport Algorithm Order Book Matching Simulation Proportional Allocation Backtest Trading Sequence Counting Design News Push System Order Book Transactions Investment Strategy Backtest Different Ways to Perform Stock Transactions Count the Occurrences of 'OPTIVER' in a Grid Market Updates Stream Decoding Real-time Ticket Purchasing System Record Log Customer Checkout Duration Designing Scalable Website for 100,000 Concurrent Users with Live Comments Add Subscripts to Duplicate Packages and Output YAML Dependencies

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