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."
LLM Fundamentals: Tokenization Design and KL-Regularized SFT
This question evaluates depth of knowledge in large language model fundamentals, specifically subword tokenization design and KL-regularized supervise...
Design a Product Photography Upload Service
Design a Product Photography Upload Service Design a service for a commerce platform's product-photography workflow. A merchant ships an item to a stu...
Implement Layered Endpoint and Global Rate Limits
Design an in-process rolling-window rate limiter that enforces both per-endpoint and backend-wide limits atomically. Examine boundary semantics, concu...
Present Recent Analytics Work for a Recruiter
Describe your most recent work to a recruiter, then identify one additional experience you would want the recruiter to share with the hiring team. Mak...
Design a Secure PDF Data Room
This question evaluates a candidate's mastery of system design and secure authorization models for multi-tenant file-sharing platforms, focusing on or...
Turning Interview Code into a Reusable Library or API
You have just finished implementing a small game engine during a coding interview: a board data structure for a two-player piece-dropping game, a func...
Design A Low-Latency Holiday Lookup Service
Prepare for a system design prompt about making a holiday lookup API much lower latency when data comes from a downstream service. The question focuse...
Design a Real-Time Chat System
This system design question tests a candidate's ability to architect a scalable real-time messaging platform, focusing on transport protocol selection...
Java, Spring & Kafka Fundamentals Deep-Dive
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Design a Text-to-Video Generation Platform (Sora-style)
This ML system design question evaluates a candidate's ability to architect the infrastructure around a large generative video model, including asynch...
Design an In-Flight Entertainment Experience for a Small Screen
Design an In-Flight Entertainment Experience for a Small Screen A budget airline wants an in-flight entertainment system that helps differentiate its ...
Maximum L1 Distance Between Equal-Length Subarrays
Problem Implement max_l1_subarray_distance(a, b) for two nonempty integer arrays. Choose one nonempty contiguous subarray from a and one nonempty cont...
Design a Scalable Job Scheduler
Design an internal job scheduling platform for a large company. The platform lets internal services and engineers submit jobs that run at a specified ...
Compute Statistics from a Frequency Array
Compute Statistics from a Frequency Array You receive an array freq of length 256. freq[v] is the number of times integer value v occurs in an implici...
Implement a Single-Screen Tic-Tac-Toe Game with State Management
Implement a single-screen Tic-Tac-Toe game. Maintain game state, support player moves, detect wins and draws, prevent invalid moves, and keep the impl...
Optimize Nearest-Center Assignment Without Materializing NxKxD Distances
Given points X with shape N x D and cluster centers C with shape K x D, return an assignment for each point to its nearest center by L2 distance. The ...
Design Comment Prediction Ranking System
This question evaluates proficiency in end-to-end machine learning system design for predicting user engagement, specifically the probability of a use...
Design an Agent Harness and Evaluation System
Design an Agent Harness and Evaluation System Design a harness and evaluation platform for a tool-using AI agent. The agent receives a user task, may ...
Find the Longest Subarray with at Most Two Distinct Values
Find the Longest Subarray with at Most Two Distinct Values Given an array of integers, return the length of the longest contiguous subarray containing...
Design a Store Recommendation System and Explain ML Trade-offs
Design a store recommendation system and discuss ML domain trade-offs, including a decision-tree-style refund model. `hint Hint 1 Start by stating ass...