Machine Learning Engineer + Data Scientist + Software Engineer 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."
Count Substrings with No Repeated Characters
Count Substrings with No Repeated Characters Given a lowercase English string s, return the number of nonempty contiguous substrings whose characters ...
Explain PM collaboration and AI code quality
This question evaluates collaboration and leadership competencies in partnering with Product Managers and in managing code quality risks introduced by...
Review an inference API design for scale
System Design Review: A Machine-Learning Inference API at Scale Background You are reviewing a teammate's design document for a production machine-lea...
Design a desktop AI chat frontend
Design a Frontend Architecture for a Cross-Platform Desktop Conversational AI App Context You are designing the frontend architecture for a cross-plat...
Group movies via graph traversal
You are given n movies labeled 0..n-1 and a list of undirected pairs (a, b) meaning movies a and b are similar. Group all movies into categories where...
Explain conflict, ownership, and AI use
Question Prepare structured answers for an Amazon-style behavioral interview (intern / early-career software engineer) that probes leadership-principl...
Explain ML and statistical modeling
This question evaluates mastery of machine learning and statistical modeling concepts including class-imbalance strategies, loss function behavior and...
Design Features for Residual Volatility
This question evaluates competency in feature engineering for financial time-series, volatility forecasting after removing systematic market effects, ...
Compute probability match lasts 5 games
Two players play independent games of table tennis. - Player A wins each game with probability \(p\) (constant across games). - They play a best-of-5 ...
Design a Stock Trading Platform
This question evaluates a candidate's ability to design a robust, scalable brokerage platform covering distributed systems architecture, transactional...
Solve Four Online Assessment Coding Tasks
This set of four problems evaluates a candidate's proficiency in core algorithmic competencies including string parsing and bracket validation, bitwis...
Design a Layover Activity Recommendation App
You are designing a mobile app for travelers who have free time during an airport layover. The app should recommend useful activities the traveler can...
Shortest Bridge to Connect Two Islands
You are given an n x n grid where each cell is either water (0) or land (1). Land cells that are adjacent horizontally or vertically belong to the sam...
Count the Ways to Decode a Numeric Cipher
A substitution cipher maps each uppercase English letter to a number: 'A' → 1, 'B' → 2, …, 'Z' → 26. To encode a word, every letter is replaced by its...
Describe past project experience clearly
You are interviewing for a Data Scientist Intern role in an asynchronous video interview format. Prepare concise, structured responses to the followin...
Predict future time-series values
Predict future time-series values End-to-End Time-Series Forecasting (PyTorch) Context You are given one or more regularly sampled numeric time series...
Estimate Revenues and Costs for New Amusement Park Launch
Estimate Revenues and Costs for New Amusement Park Launch Amusement Park Case: Revenue, Costs, Profit, and Go/No-Go Context You are advising an amusem...
Explain SHAP in an ML System
Describe how you would build an end-to-end machine learning system for a business use case such as churn prediction, ad conversion prediction, or cont...
Design an online auction system
Design an online auction system (eBay-style). Requirements: - Users create auctions with start/end time and starting price. - Users place bids; system...
Propose and Validate a Mobile App Improvement
Assume you are working on a consumer mobile app. Propose one product improvement that could improve user engagement, retention, or conversion. Your an...