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."
Collect Pins from Reachable Boards
Collect Pins from Reachable Boards The interview report names a board-and-pin coding problem whose intended approach was breadth-first search but does...
Compute the Product of an Array Except Self
The interview report preserved the input-output example but not every original restriction. The following is a self-contained version of the reported ...
Design a task management system with TTL
Task Management System (in-memory) Design and implement an in-memory task management system that supports tasks, users, task assignment with TTL (time...
Remove Duplicate Letters Lexicographically
Remove Duplicate Letters Lexicographically Given a lowercase string, remove repeated occurrences so that every distinct letter appears exactly once. T...
Select MOST/LEAST appropriate actions (SJT)
Situational Judgment Test (SJT): Choose the MOST and LEAST appropriate action This question reproduces the format of a pre-interview Situational Judgm...
Implement 1NN Embeddings and Forward Pass
This question evaluates proficiency in vectorized linear algebra and neural-network forward-pass implementation within the Machine Learning domain, co...
Parse and Summarize HTTP Access Logs
Parse and Summarize HTTP Access Logs Given a list of raw access-log strings, parse valid records and report the number of total requests, client error...
Design APIs for a Voting System
Design APIs for a Voting System Design the APIs and core data model for a voting system. Begin by clarifying the type of vote: identified or anonymous...
Design an Async Job Scheduler
Design an asynchronous job scheduler service. The service must support two job types: 1. Immediate jobs: submitted jobs that should run as soon as pos...
Count a Distributed Tree with Nonblocking Messages
Count a Distributed Tree with Nonblocking Messages A tree's nodes run as independent processes on different machines. A node knows only its own ID, it...
Simulate room assignments for scheduled meetings
This question evaluates scheduling and event-simulation skills, including time-ordered processing, resource allocation with tie-breaking, and efficien...
Implement and Debug Backprop in NumPy
Two-Layer Neural Network: Backpropagation and Gradient Check (NumPy) You are implementing a fully connected two-layer neural network for multi-class c...
Design a robot movement command system
Robot Movement (Pair Programming) You are given an empty starter repository (only a README). Implement a small, testable robot movement module that ca...
Optiver Beat The Odds: Five Rapid-Fire Probability Brainteasers (Dice, Cards, Coins, Pigeonhole)
You are taking a timed online quantitative assessment (in the style of Optiver's "Beat The Odds" test). It consists of rapid-fire probability question...
Design ledger and bikemap integration
System Design: Strongly Consistent Ledger + External Service Integration Design two loosely related components for a production-grade environment, and...
Build a Versioned In-Memory Database
Build a Versioned In-Memory Database The source reports a four-stage in-memory database exercise but does not provide its exact method signatures. The...
Build a Progressive Cloud Storage System
Build a Progressive Cloud Storage System The source reports four storage stages but not the exact API. The command encoding, quota accounting, compres...
Design Room-Level Hotel Reservations Without Double Booking
Design Room-Level Hotel Reservations Without Double Booking Design a hotel reservation service that models individual room numbers rather than abstrac...
Design an AI playground editor
This question evaluates full-stack system design competencies including real-time response streaming, rich-text editor data modeling, backend APIs, pe...
Design a Parking Lot
This question evaluates object-oriented modeling, API design, resource allocation, and concurrency control by asking for classes, relationships, key m...