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 GPU credit allocator
Design a GPU Credit Allocation System Design a GPU credit allocation system for a multi-tenant compute platform (for example, OpenAI's GPU infrastruct...
Moderator System with Ranking, Communities, and Demotion
This question tests practical data structure design and object-oriented system modeling, requiring the implementation of a hierarchical moderator mana...
Time-Based Key-Value Store
This question evaluates the ability to design a data structure that supports versioned storage and efficient point-in-time lookups. It tests binary se...
Design a Drop-off Spot Selector
This question evaluates expertise in ML-driven system design for safety-critical autonomous vehicle decisions, covering real-time decision-making, geo...
Design a deck of cards with shuffle/draw
Object-Oriented Design + Randomness: A Deck of Cards Design an in-memory model of a standard 52-card playing deck. Your design will be exercised by cl...
Predict Bike Dock Demand
This question evaluates a data scientist's competency in time-series demand forecasting, covering temporal target definition, temporal feature enginee...
Build a time-series forecasting model
Build a time-series forecasting model Forecast the Next H Steps for Time Series Context You are given one or more time series with timestamps and nume...
Java Core Deep Dive: Concurrent Collections and Java 8 Features
This question evaluates a candidate's depth of knowledge of the Java standard library, covering thread-safety mechanics in concurrent collections and ...
Design a Single-Domain Chatbot
Design a chatbot system for a single enterprise customer and a single business domain. For example, the chatbot may answer support questions for one p...
Implement string formatting and request tracking tasks
This multi-part question evaluates string manipulation, numeric formatting, character-mapping validation under 180° rotation, and event-tracking/order...
Design stock price time-series store and query
This question evaluates system design skills for time-series data storage and querying, covering scalability, partitioning, indexing, event-time handl...
Design an RSS News Feed Service
Design an RSS news feed service. The service lets users subscribe to RSS sources, ingests articles from those sources on a schedule, stores article me...
How predict vehicles’ turn direction at intersection?
This question evaluates a data scientist's competency in time-series intent prediction at intersections, including label definition under ambiguity, t...
Analyze Correlations and Generate Gaussians
You are interviewing for a quantitative data science role. Answer the following probability and simulation questions: 1. Let \(X\), \(Y\), and \(Z\) b...
How would you evaluate a carousel launch?
This question evaluates a data scientist's skills in experimental design, product-metric specification, causal inference, and diagnostic analysis for ...
Implement permutations and image retrieval
The coding portion included several short exercises for a vision-focused ML role: 1. Given an array of distinct integers, return all possible permutat...
Design a restaurant waitlist system
You are implementing the waitlist system for a restaurant. Parties arrive over time, can cancel, and get seated when a table becomes available. Rules ...
Design A WhatsApp-Style Messaging System
Design a messaging system similar to WhatsApp. Users should send one-to-one and group messages, receive messages in near real time, and recover messag...
Test Whether a Routing Experiment Reduced Pickup Time
An A/B test in San Francisco during July 2024 evaluates a new routing algorithm intended to reduce time to pickup. You have: `text df_users(user_id, v...
Analyze matrix multiplication complexity
In an ML coding interview, you're handed a PyTorch file and asked a series of complexity questions about the operations in it. One of them: Given two ...