150 Most Frequently Asked Questions On Quant Interviews Official

is positive definite, what does that imply about its eigenvalues and its determinants?

Derive the relationship between a European call and put. The Greeks: What does Delta represent? What about Gamma?

: You toss a fair coin repeatedly. What is the expected number of tosses to get two consecutive heads ( HHcap H cap H )? What about a head followed by a tail ( HTcap H cap T

: A deck of 52 cards is flipped over one by one. Before each card is revealed, you guess its color (red or black). Assuming you employ the optimal strategy and keep track of revealed cards, what is your expected number of correct guesses? N-th Passenger Dilemma : passengers board an airplane with 150 Most Frequently Asked Questions On Quant Interviews

What is the curse of dimensionality, and how does it degrade distance-based algorithms like KNN?

: How does automatic garbage collection work in languages like Python or Java? Why do high-frequency trading (HFT) platforms avoid it?

: Martingales, Brownian motion, Itô's Lemma, and continuous-time asset pricing models. is positive definite, what does that imply about

To help you prepare systematically, we have compiled and categorized the 150 most frequently asked questions in quant interviews. This guide breaks them down into core disciplines: Probability & Statistics, Linear Algebra & Calculus, Brainteasers & Logic, Finance & Options Theory, and Coding & Algorithms. Part 1: Probability & Statistics (Questions 1–40)

What is the rank of a matrix, and how does it relate to the dimension of its null space? are square matrices, does ABcap A cap B always have the same eigenvalues as BAcap B cap A ? Prove it.

floors. Each person chooses their destination floor independently and uniformly at random. What is the expected number of stops the elevator will make? 2. Linear Algebra and Calculus (25 Questions) What about Gamma

What is the reflection principle for Brownian motion, and how is it used to price barrier options?

: Define a p-value. Explain Type I error (false positive) and Type II error (false negative) within the context of backtesting a trading strategy.

How do you make an option position delta-neutral?