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 Composable Event Recommendations
This question evaluates a candidate's ability to design composable, extensible recommendation logic and ranking for a ticket marketplace, emphasizing ...
Design a News Aggregator
Design a news aggregation system that collects articles from many external news sources and serves a unified feed to end users. A key constraint is th...
Explain ML and statistical modeling
This question evaluates mastery of machine learning and statistical modeling concepts including class-imbalance strategies, loss function behavior and...
Design cloud storage system
Design cloud storage system In-Memory Cloud Storage: Design and Implement You are asked to design and implement an in-memory cloud storage system that...
Improve and debug the shopping app
You are evaluating a live-shopping mobile app from a product-minded engineering perspective. Answer the following as one integrated exercise: 1. What ...
Design a multi-timer using single underlying timer
You are given a Timer class that has access to a single underlying system timer API that can only keep one active timer at a time. Underlying single-t...
Write SQL to rank top products per category
You are given two tables: products - product_id (int, primary key) - category (string) order_items - order_id (int) - product_id (int) - quantity (int...
Design a user behavior monitoring system
System Design: User Behavior Monitoring System You are asked to design a monitoring/analytics system that collects user behavior events from clients (...
Implement Task Management and Duplicate Detection
This question evaluates implementation and system-design skills across two problems: an in-memory task management service (CRUD operations, prioritize...
Compare Two Coin Proportions
You are given results from two independent coin-toss experiments: - Coin A was tossed 100 times and landed heads 40 times. - Coin B was tossed 1,000 t...
Design a one-to-one chat system
This question evaluates a candidate's ability to design scalable, real-time one-to-one messaging systems, testing competencies in transport choice for...
Design a fast host listing metrics page
Design the backend for a host (landlord) listings page. User flow: - Host opens a page showing many of their listings. - Host selects a date range. - ...
How to forecast bike dock demand
This question evaluates competency in time-series forecasting and demand prediction, including feature engineering, model selection and evaluation, ha...
Design a Relational-to-DynamoDB Migration System
Design a production migration system that moves an existing e-commerce service from a relational database to DynamoDB with minimal downtime. Your desi...
Search Monster Battle Strategies
This question evaluates algorithmic problem-solving around deterministic simulation and state-space exploration, focusing on handling transient state ...
Design concurrent range-aware file caching client
Design concurrent range-aware file caching client System Design: High-throughput Client-side Ranged-read File Cache You are asked to design and specif...
Design a crypto trading web frontend
Design the front-end architecture for a retail cryptocurrency trading web app (like a spot exchange). Assume the product needs these core screens and ...
Design a URL shortening platform
Design a Scalable URL Shortening Platform Context Build a Bitly-like URL shortener that maps long URLs to short codes and performs HTTP redirection re...
Design real-time stock price viewer
System Design: Real‑Time Stock Prices Viewer (No History) You are designing a real‑time system that lets clients view current stock prices only. No hi...
Compute Groupon unit economics and break-even
Restaurant Coupons and Unit Economics Context: A restaurant's variable cost (VC) is 40% of pre-discount spend and fixed cost (FC) is $100/day. Assume ...