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."
Debug round-robin, DashMap, and simple cache
You are given a service that routes requests to a list of nodes, each marked as either available or unavailable. The pickNode() function is intended t...
Assess cooldown and plan interview strategy
Assess cooldown and plan interview strategy Interpreting a One-Year Interview Cooldown and Maximizing Signal in a Three-Part Onsite Context You are pr...
Design an online auction system
Design an online auction system System Design: Real-Time Online Auction Platform You are asked to design an online auction system that supports real-t...
Handle Ambiguity in the Workplace
Handle Ambiguity in the Workplace Behavioral: Managing Ambiguity and Changing Requirements Context For a Machine Learning Engineer technical screen, b...
Explain shader compilers and graphics APIs
Explain shader compilers and graphics APIs Shader Compilation Pipeline, API Comparison, and Minimal Compiler Design Context Assume you are targeting m...
Explain your project system design
Explain your project system design System Design Walkthrough: Project You Owned Context: In an onsite system design interview for a Software Engineer ...
Describe going beyond your scope
Describe going beyond your scope Behavioral & Leadership Prompt: Stepping Beyond Scope You are a Software Engineer interviewing onsite. Provide a conc...
Analyze expectations, correlations, and investment strategies
This multipart Machine Learning question evaluates probabilistic expectation and stopping-time reasoning, combinatorial expectations in random permuta...
Serialize Expression Tree Minimizing Parentheses
This question evaluates proficiency with binary expression trees, operator precedence and associativity, and the ability to serialize an abstract synt...
Traverse an Org Chart by Level
You are given an organization's reporting structure as a flat list of employee-manager relationships. Exactly one employee is the root (the CEO) and h...
Design a YouTube/Netflix video platform
Design a video platform similar to YouTube/Netflix. Requirements: - Upload videos (for YouTube-like) and/or ingest catalog (for Netflix-like). - Trans...
Design a chat messaging system
Design a chat system similar to WhatsApp/Messenger. Requirements: - 1:1 and group chats. - Send/receive messages in real time when online; store-and-f...
Design a real-time game leaderboard
Design a real-time leaderboard for an online game. Requirements: - Players submit score updates frequently. - Query top N players globally and per reg...
Explain why IG Story usage exceeds Facebook
Explain why IG Story usage exceeds Facebook Product analytics case: Instagram vs Facebook Stories You work on Stories across two apps: Instagram (IG) ...
Solve sliding window and tree BFS
Solve sliding window and tree BFS Solve a typical medium-level sliding-window problem (e.g., longest substring without repeating characters). LeetCode...
Perform matrix Candy Crush elimination
Question Implement a function that, given an m × n integer matrix representing colored blocks (same integers = same color), performs one round of "Can...
Discuss large language models
Discuss large language models LLMs: Advances, Product Integration, Production Challenges, and Risk Mitigation Context You are interviewing for a Softw...
Implement persistent key-value store
Question Design and implement an in-memory key-value store supporting set(key, value), get(key), shutdown() that flushes all data as bytes to a medium...
Design user communication functions
Design user communication functions In-Memory Communication Manager Context Build a simple in-memory component that tracks which users can communicate...
Debug and optimize React performance issues
Debug and optimize React performance issues React Debugging and Performance Assessment Background You're reviewing a React single-page application dur...