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 a Distributed Rate Limiter
Design a distributed rate limiting system for a large API platform. The platform has many API gateways and backend services running across multiple re...
Design a Real-Time Top-K Ranking System
Design an object-oriented real-time Top-K ranking system. The system receives score updates for many entities, such as users, drivers, restaurants, or...
Implement 1NN with NumPy
Implement a 1-nearest-neighbor classifier from scratch using NumPy. You are given: - X_train: a NumPy array of shape (n_train, d) containing training ...
Design Multi-Dimensional Request Rate Limiting
Design a rate limiter for a backend service. Part 1: Build a standard rate limiter that can limit incoming requests by a key such as user ID, IP addre...
Design ad frequency capping
Design a frequency capping system for an advertising platform. The system must ensure that a user does not see the same advertisement more than a conf...
Explain Core ML Interview Concepts
Answer the following machine learning fundamentals questions in a phone screen for an applied scientist role: 1. What are the main assumptions of line...
Design a Distributed Crossword Solver
Design a scalable service that solves crossword-style fill-in puzzles. A request contains a rectangular grid with blocked cells, empty cells, optional...
Implement a Simplified DNS Resolver
Implement a simplified DNS resolver in Python. You are given an in-memory DNS zone and must complete a small resolver step by step. The goal is not to...
Design Restaurant Search and Monitoring
Design the search component for a food delivery application. Users should be able to search for restaurants and menu items by text query, for example ...
Design a Distributed Crossword Solver
Design a distributed solver for crossword-like word puzzles. You are given a grid containing blocked cells and empty cells, plus a dictionary of valid...
Design an Online Coding Judge Platform
Design an online coding practice and judging platform. The platform should let users browse programming problems, write and submit code in multiple la...
Design a Book Price Aggregator
Design a book purchasing marketplace where your service acts as an intermediary between customers and hundreds of partner bookstores. A customer submi...
Validate AI-Generated Code Safely
Describe your experience using generative AI tools for software development. How do you ensure that AI-generated code is correct, maintainable, and sa...
Debug Validation Error Aggregation
You are given a Python validation library similar to Colander. A schema node can run multiple validators. Validators may raise validation errors, and ...
Build a Payment Fraud Detection Model
You are interviewing for a Machine Learning Engineer role at a FinTech company. Part 1: Explain the following ML fundamentals: - What is overfitting? ...
Design an Uber Eats Cart Service
Design the shopping cart service for a food delivery platform similar to Uber Eats. The service should allow customers to add, update, and remove menu...
Design a Text-to-Video Generation System
Design a Sora-like text-to-video generation platform. Users submit a text prompt, optional generation settings, and possibly optional conditioning med...
Design a prompt playground
Design a prompt playground for developers and prompt engineers. The product lets users write prompts, choose model settings, run prompts against AI mo...
Build a Durable Key-Value Cache
Design and implement an in-memory key-value cache that uses a write-ahead log for durability. The cache should support at least the following operatio...
Design Human Avoidance for Warehouse Robots
Design a software module that allows an autonomous warehouse robot to avoid humans while navigating. Your answer should cover: - Which sensors you wou...