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."
Derive and implement calibration via temperature scaling
Derive and implement calibration via temperature scaling Temperature Scaling for Softmax Calibration Context You have a trained multi-class classifier...
Explain why our company and startups
Explain why our company and startups Motivation and Startup Fit — Behavioral (Machine Learning Engineer) Context You are interviewing for a Machine Le...
Maximize profit with transaction fee
Maximize profit with transaction fee Given an array of daily stock prices and a fixed transaction fee charged on each sell, compute the maximum profit...
Implement in-memory KV store with serialization
Implement an in-memory key-value store in Python that supports setting and retrieving values and can serialize and deserialize the entire store. Defin...
Implement a GPU credit manager
Implement a GPU credit manager for a compute cluster. Each user has a nonnegative credit balance that can be increased (grantCredits(user, amount)), c...
Maintain streaming median and loosemedian
Maintain streaming median and loosemedian Design a data structure for an online stream of positive integers supporting insert (x). After each insertio...
Implement distinct islands and sliding maxima
Implement distinct islands and sliding maxima 1) Given a binary grid where 1 represents land and 0 represents water, count how many distinct island sh...
Explain handling conflicts and learning from mistakes
Explain handling conflicts and learning from mistakes Behavioral Prompt: Disagreement and Mistake Reflection Context: You are interviewing for a Softw...
Design camera access-control service
Design camera access-control service Design an Access-Control Service (Users, Cameras, Nested Groups) Context You are building a multi-tenant access-c...
Build a baseline linear regression pipeline
Build a baseline linear regression pipeline Task: Baseline Linear Regression Pipeline (Python) Context You are given a tabular dataset in a pandas Dat...
Versioned Key-Value Store with Nested Transactions (Begin, Commit, Rollback)
Implement an in-memory versioned key-value database that supports transactional writes with three transaction-control operations: begin (start a trans...
Answer HR motivation and project experience questions
Answer HR motivation and project experience questions You are interviewing for a technical role (e.g., software engineer, data scientist, or research ...
Design a cloud storage service
Design a cloud storage service System Design: Cloud Document Storage and Sharing Service Context Design the backend for a large-scale cloud document s...
Share examples of impact and simplicity
Share examples of impact and simplicity Behavioral prompt: Exceeding customer expectations and simplifying complex problems Context You are in a softw...
Design a mini banking system
Design a mini banking system In-Memory Banking System — Design and Implementation You are to design and implement an in-memory banking system that sup...
Design user top-10 songs service
Design user top-10 songs service Design a Service to Compute Each User's Top 10 Songs Context You are designing a backend service for a large-scale mu...
Build a Quadtree and Analyze a Graph
Solve the following two coding problems. 1. Build a quadtree from an image You are given an N x N matrix of integers representing an image, where N is...
[Analytical Reasoning] Comparing Two Newsfeed Ad Insertion Methods
Compare two ad-insertion methods for a 100-post newsfeed. Both methods have the same average ad load. - Method A: each post is independently replaced ...
Discuss learning and feedback experiences
Discuss learning and feedback experiences This behavioral set covers self-directed learning and how you respond to feedback. Be ready to walk through ...
Optimize Trapping Rain Water
Question LeetCode 42. Trapping Rain Water – implement a brute-force solution, analyze its complexity, then optimize to an O(n) solution with O(n) spac...