what is 256 squared and what is it cubed
Quant Developer Interview Questions
2,954 quant developer interview questions shared by candidates
Expectation and optimal strategies in coin game.
You are given three envelopes, one of which contains $100 and the others contain nothing. You randomly pick one envelope but don’t open it. The interviewer then opens one of the other two envelopes and shows that it’s empty. Now you have a choice: stick with your original envelope or switch to the other unopened envelope. What should you do to maximize your chances of winning, and why?
It was something like two players flip coins until one gets three heads. They take turns. Given that I go first and get heads, what is the probability that I win.
Card games associated with expectation. Options introduced to hedge against risks.
What is the probability of getting an even number of heads when throwing a coin 9 times?
A blind auction for the outcome of a rolls, from 1-100. How should you bid? How should you bid if you have to bid first? What would be your strategy?
Some unique probaility and statisctics question
You flip a fair coin until you get heads. What is the expected number of flips?
You play a 100-round game: each round you can either roll a fair 20-sided die (uniform 1 to 20) or “lock in” the current face and collect that same reward for all remaining rounds. You must roll in the first round. What is your optimal stopping / locking strategy and expected value?
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