Data Scientist Software Engineering Fundamentals Interview Questions
Practice 17 real Software Engineering Fundamentals interview questions for Data Scientist roles. From companies including Bnp, Jane Street, Imc, J.P. Morgan, Morgan Stanley.
"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."
Explain Option Greeks and Futures Pricing
You are interviewing for a quantitative trading or data-focused role. Answer the following market fundamentals questions clearly and quantitatively. 1...
Debug a Python Aggregation Loop with Dictionaries and Lists
Prompt The reported technical-screen format was Python code review: inspect an existing snippet and identify logic errors involving dictionaries, list...
Calculate Playback Counts per Stream
You are given two database tables: streamer | column | type | description | |---|---|---| | streamer_id | integer | Primary key of the streamer | | st...
Compute the Probability for Two Uniform Variables
Let \(X\) and \(Y\) be independent random variables, each uniformly distributed on \([0,1]\). Define: - \(L = \max(X,Y)\) - \(S = \min(X,Y)\) What is ...
Alternating Die-Roll Game: Optimal Accept/Reject Strategy
Two players, A and B, play the following game with a fair 21-sided die whose faces are labeled with the integers $-10, -9, \ldots, 9, 10$ (one integer...
Compute expected max/min of n die rolls
You roll a fair six-sided die n times independently. 1) Compute the expected value of the maximum roll. 2) Compute the expected value of the minimum r...
Compute expected value of simple gambling games
You are asked two probability/EV questions. 1) Dice game expected value / fair entry fee A game works as follows: - You pay an entry fee of \(c\) doll...
Explain and compute option delta
In options trading, what is an option’s delta? 1) Give the definition of delta and explain its intuition/sign for calls vs puts. 2) Under the Black–Sc...
Estimate Greeks and hedging PnL
Consider a vanilla European option under the Black-Scholes framework. 1. Without using a calculator, explain how you would mentally estimate the optio...
Find valid range of q for outcome probabilities
You have a 3-outcome experiment with mutually exclusive outcomes: - Outcome 1 occurs with probability \(q\) - Outcome 2 occurs with probability \(q^2\...
How do you split coins to match heads?
There are N coins on a table. You are told that exactly H of them are heads-up (you do not know which ones). You must split the coins into two piles s...
Which Dice Game Wins More Often: One Six in 4 Rolls, or Double Sixes in 24 Rolls?
You are offered two dice games and asked to decide which one gives you a better chance of winning. - Game 1: Roll one fair six-sided die 4 times. You ...
Five Pumpkins Weighed in Every Pair: Find the Total Weight
You have 5 pumpkins. You weigh them two at a time, in every possible pairing, and the scale readings for the ten pairs are: $$21,\ 22,\ 23,\ 24,\ 25,\...
Find expected tosses to see a coin pattern
A fair coin is tossed repeatedly until a target length-3 pattern appears as a consecutive substring (e.g., HHH, HTH, HTT, etc.). 1) Describe a general...
Explain C++ virtual dispatch and object lifetime
Answer the following C++ fundamentals questions. 1) Virtual function dispatch: predict output Consider this C++ program: `cpp #include <iostream> usin...
Explain forward contracts and options
In a finance-focused technical interview, you are asked to explain two basic derivative instruments: 1. What is a forward contract? 2. What is an opti...
Prove a Tight Lower Bound on a Latin Square's Lower-Triangle Sum
Consider an $n \times n$ grid ($n \ge 1$) filled with integers so that every row contains each of the numbers $1, 2, \ldots, n$ exactly once, and ever...