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."
Design Slack-like chat system
Question Design the chat subsystem for an app like Slack/Discord. State your assumptions (scale, retention, consistency needs) and propose an end-to-e...
Design a car rental booking system
System Design: Car Rental Booking System Design an online car rental system (like Hertz or Avis) that lets users search for available rental cars, get...
Demonstrate effective AI-assisted coding workflow
In an interview where you are allowed to use an AI coding assistant, you are given a large scoped task (e.g., implementing a TCP chat server). The int...
Solve chat, grid paths, and car rentals
You are given three independent programming tasks. For each, describe and implement an efficient algorithm, and be prepared to analyze its time and sp...
Explain Overfitting and Transformer Attention
You are interviewing for a machine learning engineering role. Answer the following ML fundamentals questions clearly and compare different modeling se...
Design a Reliable Bank Payment System
Design a Reliable Bank Payment System Design a backend that accepts a customer's request to transfer money, tracks the payment through processing, and...
Design a geo-distributed rate limiter
Design a rate limiting system that works across multiple geographic regions (e.g., us-east, eu-west, ap-south). Requirements: - Enforce per-API-key li...
Solve two coding assessment tasks
The online assessment contained two coding problems: 1. Maximize store revenue You are given an integer array quantity of length n, where quantity[i...
Design a Twitter-like microblogging service
Design a Twitter-like microblogging system. You can describe it verbally and with structured notes. Requirements: - Users can post short messages. - U...
How do you give and receive feedback?
Behavioral questions about feedback: 1) Tell me about a time you had to give constructive feedback to a teammate or cross-functional partner (e.g., PM...
Implement an in-memory SQL-like table
Implement a simplified in-memory SQL-like database for a single table. You should support the following operations on a table with a fixed schema (a l...
Plan a Safe Repository-Wide Identifier Migration
Plan a Safe Repository-Wide Identifier Migration You have a very large repository whose internal variables and function names use snake case. A conver...
Solve Grid Path and Unique Substring
This question evaluates algorithmic problem solving skills in grid traversal and stateful string processing, specifically testing understanding of pat...
Longest Run of Ones After One Flip
This question tests a candidate's ability to solve a sliding window problem involving binary arrays, extending the basic "maximum consecutive ones" pa...
Compare arrays, linked lists, hash tables, trees
Answer the following computer-science fundamentals questions: 1) What are the time complexities (Big-O) of common sorting algorithms (e.g., bubble sor...
Compute the Minimum Number of Meeting Rooms
Compute the Minimum Number of Meeting Rooms Problem Implement minimumMeetingRooms(intervals) -> rooms. Each interval is a two-element integer array [s...
How validate a driving simulation is realistic?
This question evaluates skills in statistical validation of simulations, distributional comparison between real and simulated driving data, scenario-s...
Schedule Weekly Deployment Windows
Schedule Weekly Deployment Windows The source reports a weekly deployment-window scheduler. The absolute-time horizon, cyclic start == end rule, and c...
Busiest Rental Car
This question evaluates a candidate's ability to simulate a resource-allocation process using interval scheduling and greedy assignment rules. It test...
Build AI-Assisted Full-Stack Transactions App
Build a minimal full-stack app for monetary transactions This is the "AI coding" round: using an AI coding tool of your choice (e.g., Cursor), build a...