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."
Explain C++ and GPU Tradeoffs
The interview included several short-answer questions, all discussed in C++: 1. Explain how to reason about the output of a C++ program that uses both...
Design Nearby and Notification Ranking
Two machine learning system design prompts were mentioned: 1. Nearby place recommendation for a mobile user Design a real-time recommendation syste...
Explain NLP/RL concepts used in LLM agents
This question evaluates proficiency in transformer-based NLP, embedding methods, LLM agent architecture and evaluation, retrieval techniques for RAG, ...
Design a trending-articles platform
Design a Near Real-Time Trending-Articles Platform Design the backend that surfaces trending articles in near real time for a large-scale consumer pro...
Design an inference routing and scheduling layer
System Design: Routing Layer for Heterogeneous Inference Backends (GPU/CPU) Context You are asked to design a routing layer that sits between a user-f...
Determine identical files ignoring metadata
Question How would you determine whether two files contain identical bytes while ignoring all filesystem metadata? Propose and justify a hashing-based...
Explain why you want to join Airbnb
"Why Airbnb?" — Culture / Values Round (Software Engineer) You are in the culture round of an Airbnb Software Engineer loop. The interviewer asks you ...
Answer why Jane Street
HR Screen Behavioral Question: Why Jane Street? You are interviewing for a Software Engineer role. In 60–90 seconds, explain: 1. Why Jane Street speci...
Design a user behavior monitoring system
System Design: User Behavior Monitoring System You are asked to design a monitoring/analytics system that collects user behavior events from clients (...
Design an ML search system with RAG
Design an ML search system with RAG System Design: ML-Powered Enterprise Search with RAG Design an ML-powered enterprise search system using Retrieval...
Compute A/B significance, CI, and power
You run an A/B test for 7 days. Control A: 520 conversions out of 10,000 sessions. Variant B: 630 conversions out of 11,500 sessions. Use a calculator...
Design and sample for credit default prediction
A bank wants a model to predict 90-day credit card default at account-month level for proactive outreach. Class prevalence in production is about 2% d...
Solve the 12-coin balance puzzle
The 12-Coin Counterfeit Puzzle (Three Weighings) You are given 12 visually identical coins. Exactly one of them is counterfeit. The counterfeit coin d...
Analyze vision model failures
For a computer vision product, discuss the following: 1. Explain the core machine learning fundamentals that matter most in vision work, including bia...
Describe an ML system you built
Describe a machine learning system that you previously designed, built, or owned. Cover the problem statement, business goal, data sources, feature en...
Explain dataset size, generalization, and U-Net skips
This question evaluates understanding of core machine learning and computer vision competencies — including dataset size trade-offs, generalization an...
Choose DynamoDB vs MySQL for a backend
This question evaluates a candidate's ability to reason about data modeling, access patterns, query complexity, consistency and transactional requirem...
Minimum Path Length Through a Grid With One Allowed Cell Conversion
You are given an m x n grid grid where every cell holds either 1 (an open cell you may stand on) or 0 (a blocked cell). You start at the top-left cell...
Implement a FIFO Queue Using Two Stacks
Implement a FIFO Queue Using Two Stacks Implement a first-in-first-out (FIFO) queue using only two last-in-first-out (LIFO) stacks. The implemented qu...
Design and implement a word-guessing game
Word-Guessing Game (Wordle-like) — Design and Implement Context Build a small, standalone command-line application that lets a user guess a secret wor...