Optiver Interview Questions

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83 questions
548 companies
3 roles
Last updated Nov 2026

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Quantitative Researcher Quantitative Trader Quantitative Developer

Continue the sequence 4, 2, 3, 6.5, 16, 44, ? Options: 137, 142, 129, 132, 133.
3 years ago
A family keeps having children until the number of daughters exceeds the number of sons by exactly one. What is the expected total number of children?
10 hours ago
You start with $1 and your friend with $2. Each round you bet $1 and you win with probability 2/3. What is the probability you take all your friend's money before losing yours?
10 hours ago
What is the expected number of rolls of a fair die to see every face at least once?
2 years ago
A bag holds 10 red, 10 yellow and 10 blue balls. You draw balls until only two colours remain in the bag. What is the expected number of balls remaining?
10 hours ago
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You roll a die repeatedly, keeping a running sum, until the sum exceeds 100. What is the probability that the last roll was a 2?
10 hours ago
Two particles start at opposite corners of an octagon. Each second each one moves one edge clockwise or anticlockwise on a coin flip. What is the expected number of coin flips until they meet?
10 hours ago
You start with $10 and bet $1 per round on a fair coin, stopping at $20 or $0. What is the probability you reach $20?
2 years ago
A machine outputs integers uniformly from 1 to 10. You and a friend each sum two draws. What is the probability your sums are equal?
10 hours ago
What are the top three qualities needed to succeed at Optiver? Which of those is your weakest, and why?
10 hours ago
A particle starts at the centre of a 10 x 10 grid and moves one step up, down, left or right at random each move. What is the expected number of moves until it leaves the grid?
2 years ago
Process a stream of trades and price updates and, on request, report the trade on an instrument with the largest loss per lot.
4 years ago
Implement a class that tracks elephants entering and leaving a room and returns your elephants that are at least as tall as the tallest competitor present.
5 years ago
Count the occurrences of a word along straight lines in a grid of characters.
10 months ago
Implement an order book with three functions: insert an order, delete an order, and return the total volume resting at a given price level.
10 months ago
Design a circular buffer.
+110 months ago
Design a trading system with event streaming.
10 months ago
What is the next number in the sequence 1, 9, 10, 19, 29?
10 hours ago
Why do you want to work at this firm, and why this role?
+610 hours ago
How does Optiver make money?
10 hours ago

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Optiver Interview Questions

Continue the sequence 4, 2, 3, 6.5, 16, 44, ? Options: 137, 142, 129, 132, 133.

A family keeps having children until the number of daughters exceeds the number of sons by exactly one. What is the expected total number of children?

You start with $1 and your friend with $2. Each round you bet $1 and you win with probability 2/3. What is the probability you take all your friend's money before losing yours?

What is the expected number of rolls of a fair die to see every face at least once?

A bag holds 10 red, 10 yellow and 10 blue balls. You draw balls until only two colours remain in the bag. What is the expected number of balls remaining?

You roll a die repeatedly, keeping a running sum, until the sum exceeds 100. What is the probability that the last roll was a 2?

Two particles start at opposite corners of an octagon. Each second each one moves one edge clockwise or anticlockwise on a coin flip. What is the expected number of coin flips until they meet?

You start with $10 and bet $1 per round on a fair coin, stopping at $20 or $0. What is the probability you reach $20?

A machine outputs integers uniformly from 1 to 10. You and a friend each sum two draws. What is the probability your sums are equal?

What are the top three qualities needed to succeed at Optiver? Which of those is your weakest, and why?

A particle starts at the centre of a 10 x 10 grid and moves one step up, down, left or right at random each move. What is the expected number of moves until it leaves the grid?

Process a stream of trades and price updates and, on request, report the trade on an instrument with the largest loss per lot.

Implement a class that tracks elephants entering and leaving a room and returns your elephants that are at least as tall as the tallest competitor present.

Count the occurrences of a word along straight lines in a grid of characters.

Implement an order book with three functions: insert an order, delete an order, and return the total volume resting at a given price level.

Design a circular buffer.

Design a trading system with event streaming.

What is the next number in the sequence 1, 9, 10, 19, 29?

Why do you want to work at this firm, and why this role?

How does Optiver make money?

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