DRW Data Scientist Interview Questions
Practice the exact questions companies are asking right now.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Solve three algorithmic tasks in Python
You are given 120 minutes to implement three independent algorithmic tasks in Python. Each task specifies the required input/output behavior, the cons...
Compute Markov steady state and expectations
Compute Markov steady state and expectations Probability and Game Theory: Three Sub-questions Context: The exact transition matrix P (for Q1) and the ...
Compute expected arc length on a circle
On the unit circle (radius \(1\), centered at the origin), pick three points independently and uniformly at random on the circumference. These three p...
Differentiate sample vs population standard deviation
Differentiate sample vs population standard deviation Population vs. Sample Standard Deviation in a Finite Rolling Window Context You are implementing...
Solve movie ratings, array, release scheduler
Question This is a three-part coding screen used for a Data Scientist role at DRW. You will work through three independent array/sequence problems, ea...
Solve Markov and distribution expectation problems
Solve Markov and distribution expectation problems Statistics, Linear Algebra, and Game Theory Fundamentals 1) Stationary Distribution of a Finite Mar...
Derive eigenvalues and sum for inverse matrix
Derive eigenvalues and sum for inverse matrix Eigenvalues of an Inverse and Their Sum Context Let A be an invertible n×n matrix (over the real or comp...
Analyze distribution of a 3-dice product
This question evaluates probability and statistical inference skills including computation of expectation, properties of discrete order statistics (po...
Compute rolling standard deviation in O(n)
Compute rolling standard deviation in O(n) Given an array of numbers and a window size k, compute the rolling standard deviation for every contiguous ...