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."
Implement Multi-Player Tic-Tac-Toe
Implement Multi-Player Tic-Tac-Toe Implement a game class for an N by N board and K players. Each player has a distinct one-character printable mark. ...
Design an Entitlement-Aware Agentic Portfolio Workflow
Design an Entitlement-Aware Agentic Portfolio Workflow Design an agentic workflow that accepts a portfolio-related request, obtains only the data the ...
Build a Three-Service Refund Workflow over HTTP
Build a Three-Service Refund Workflow over HTTP For this exercise, build three independently running local services: - Order Service owns order data a...
Describe a Strongly Held View That Proved Wrong
Describe a Strongly Held View That Proved Wrong Tell me about a technical or product decision you argued for strongly and later learned was wrong. Exp...
Design a Geolocation Search Service
Design a geolocation search service that returns relevant places or entities near a user. `hint Hint 1 Start by stating assumptions, then work from re...
Sort Every Concentric Matrix Border Clockwise
Sort Every Concentric Matrix Border Clockwise Given a nonempty rectangular integer matrix, process each concentric layer independently. For a layer, l...
Calculate Ordered Job Makespan Across Parallel Workers
Calculate Ordered Job Makespan Across Parallel Workers A single stage has jobs with different durations and a fixed number of identical workers. Jobs ...
Count Connected Clusters of Two-Dimensional Points
Count Connected Clusters of Two-Dimensional Points Problem Implement count_clusters(points, radius). points is a list of two-dimensional integer coord...
Evaluate Courier-Selected Delivery Distance Limits
Evaluate Courier-Selected Delivery Distance Limits A delivery marketplace is considering allowing each courier to set a maximum distance for delivery ...
Convert Leveled Rich-Text Tokens into Nested Lists
Convert Leveled Rich-Text Tokens into Nested Lists Problem Implement read_rich_text(tokens). Each token is a pair (level, text) in document order, whe...
Index a CSV Movie Catalog for Fast Year-Range Queries
Index a CSV Movie Catalog for Fast Year-Range Queries Design a class that loads a CSV movie catalog once and then answers frequent year-range filters ...
Explain Your AI Safety Values
Explain Your AI Safety Values Prepare thoughtful responses to an AI-focused values interview. The goal is not to repeat an employer's language. Show h...
Design an Embeddable Pay by Bank Widget
Design an Embeddable Pay by Bank Widget Design a Pay by Bank widget that online businesses can embed in checkout or bill-payment pages. The widget's i...
Reason About Rate Limiting Under Memory and Throughput Pressure
Reason About Rate Limiting Under Memory and Throughput Pressure Design an in-memory rate limiter and then extend the design for two production concern...
Match Limit Orders with Price-Time Priority
Implement an in-memory limit-order matcher that processes orders in arrival order and returns both the executed trades and the final resting order boo...
Implement a Rolling-Window Rate Limiter
Implement a Rolling-Window Rate Limiter Implement an in-memory rate limiter that accepts at most limit requests in any rolling interval of window_seco...
Design a Durable Concurrent Event Writer
Design a Durable Concurrent Event Writer Design a thread-safe DataWriter used by one application process on one server: `text DataWriter(file_path) pu...
Debug Tokenization and Detokenization
Debug Tokenization and Detokenization The source reports a debugging exercise with buggy tokenization and detokenization functions but does not includ...
Find the Bugs in an AI-Generated URL Shortener
This question evaluates a candidate's ability to review AI-generated code for correctness, consistency, and robustness rather than write code from scr...
Count Grid Paths Without Three Consecutive Moves
Count Paths Without Three Consecutive Moves A frog starts at (0, 0) and must reach (right_steps, up_steps). Every move is exactly one unit right (R) o...