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 Cloud File Storage
This question evaluates system design competency, specifically understanding storage architectures, the separation of metadata versus blob/object stor...
Analyze an AI Product Pilot and Recommend Whether to Expand It
An AI product has been tested with a limited group of pilot users. The product team asks whether it should expand access. Describe how you would analy...
Find the Longest Common Digit Prefix Across Two Arrays
Given two arrays of positive integers, convert each integer to its decimal string representation and find the maximum length of a common prefix betwee...
Design a PDF-to-Markdown Inference API
Problem Statement Design an inference service that converts PDF files into Markdown. Assume the following building blocks already exist and you do not...
Design an SSH-Based Cloud Development Environment
Design an SSH-Based Cloud Development Environment Design a cloud development environment that is accessed by SSH rather than through a browser. Users ...
Explain Top-k and Top-p Decoding
This question evaluates understanding of autoregressive decoding strategies in probabilistic language models, assessing competency in reasoning about ...
Compute the Median After Each Stream Insertion
Compute the median after every insertion into an integer stream without repeatedly sorting the full prefix. Practice maintaining balanced data structu...
Design a chargeback ingestion and export system
This question evaluates system design skills around reliable ingestion and scheduled export of financial transaction records, specifically testing com...
Connect Your Hardest Project to Your Interest in a Role
Connect Your Hardest Project to Your Interest in a Role Give a concise self-introduction that explains why this company and role interest you. Then us...
Describe a Mentoring Experience and Its Outcome
Describe a Mentoring Experience and Its Outcome Tell me about a time you mentored another engineer. How did you understand what they needed, what did ...
Design an Online Coding Judge Platform
This question evaluates a candidate's competencies in large-scale system design, secure multi-tenant execution and sandboxing, capacity planning, queu...
Design a Local Leader Election System
This question evaluates distributed systems skills—specifically leader election, failure detection, state propagation, and the ability to design and i...
Explain Your Risk Analytics Work to a Recruiter
You are speaking with a recruiter about a risk-related data role. Give a concise introduction to your background, then explain what you do in your cur...
Explain Performance, OKRs, Failure, and Project Learning
Explain Performance, OKRs, Failure, and Project Learning Use one or two truthful projects to answer a leadership deep dive about how your performance ...
Design and Analyze Airbnb Locker Experiment
Airbnb is considering launching a luggage locker feature that lets guests store their bags before their scheduled check-in time, so they don't have to...
Design Scalable Expense Violation Processing
This question evaluates a candidate's competency in large-scale system design, distributed stateful processing, rule-engine architecture, efficient ru...
Design Employee-to-Employee Distance
Design an employee-to-employee distance system for a large company. The system takes two employees as input and returns a meaningful "distance" (or, e...
Reconcile Records Across Sources
In an AI-assisted ("AI coding") interview round, you are asked to reconcile person records across multiple data sources. Each source contains records ...
Connect Probability, Experiment Sizing, and Bootstrap Inference
Connect Probability, Experiment Sizing, and Bootstrap Inference A product team wants a precise statistical readout for a billboard-style intervention....
Design a Time-Series Database
Design a Time-Series Database Design a database for ingesting and querying timestamped measurements. A data point belongs to a logical series identifi...