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."
Simulate Infection Spread on a Grid
You are given an m x n grid representing cells in a population. Each day, all state changes happen simultaneously. Infection neighbors are the 8 surro...
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 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 Social Follow Recommendations
Implement an in-memory social network graph with three operations: - follow(followerId, followeeId): record that one user follows another user. Duplic...
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...
Implement Store Autocomplete
You are given a list of store names, for example: `text ["McDonald's", "KFC", "Burger king", "Bites", "Biscuit shop"] ` Implement an autoComplete(s) m...
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...
Compute Turnstile Crossing Times
You are given n people waiting to use a single-door turnstile. Each person has: - time[i]: the time when person i arrives at the turnstile. - directio...
Build a Transaction CSV Cleaning Pipeline
You receive a raw CSV file containing customer transaction data with the columns date, amount, customer_id, payment_method, and notes. Known data-qual...
Simulate In-Place Cellular State Updates
You are given an m x n grid of cells, where each cell is either 0 for inactive or 1 for active. All cells update simultaneously according to these rul...
Write SQL Data Transformation Queries
Use SQL to solve the following data transformation tasks. Assume standard SQL features are available, including window functions and recursive common ...
Design Mobile Model Usage Quotas
Design the mobile and backend API flow for controlling access limits to different AI model versions in a ChatGPT-like mobile app. Requirements: - The ...
Build a Compose Rating Card
Implement an Android rating card using Kotlin and Jetpack Compose. Requirements: - The card lets the user provide a star rating and a written comment....
Design a Slack-Like Messaging Platform
Design a Slack-like messaging platform that supports direct messages, group chats, and file sharing. Your design should cover: - One-to-one direct mes...
Implement Interval Overrides and Top-K Strings
Solve both coding problems below. Problem A: Apply Override Intervals You are given a set of time intervals representing normal usage periods. Each us...
Determine Whether a Word Exists in a Graph
You are given a graph as a list of node objects. Each node contains a character and a list of neighboring nodes that can be visited next. Design and i...
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...
Compute Roller Coaster Scores
You are given a list of roller coaster descriptions. Each description is a string in the format: <CoasterType> <MaxSpeed> <BumpsPerSecond> <LiftType> ...
Schedule Non-Overlapping Meetings Efficiently
Implement a meeting scheduler that stores meetings as half-open intervals [start, end), where start and end are integer timestamps and start < end. Th...
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 ...