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 To-Do List Service (CRUD, Auth, Rate Limiting, Caching & API Versioning)
Design a to-do list service. Users sign in, create multiple named lists, and within each list create, view, update, and delete tasks. The service is a...
Choose Work-Style Assessment Responses
You are taking a forced-choice work-style assessment as part of the application for an entry-level Software Engineer (SDE I) role. This is the online ...
Design a Payment Processing System with Exactly-Once Charging
Design a Payment Processing System with Exactly-Once Charging You are designing the core payment service for a marketplace platform. When a buyer chec...
Scale Duplicate File Detection
You have implemented a local duplicate-file finder: given a root directory, it walks the tree, hashes every file, and reports groups of files whose co...
Solve a Jigsaw Puzzle
You are given a collection of jigsaw puzzle pieces. Each piece has four edges — top, right, bottom, and left — and a helper function match(edgeA, edge...
Design a Ride-Sharing System (Uber-style Core Platform)
Design a Ride-Sharing System (Uber-style Core Platform) Design the core backend of a ride-sharing platform like Uber. Riders open the app, see nearby ...
Build a Payment Fraud Detection Model
You are interviewing for a Machine Learning Engineer role at a FinTech company that processes online card payments. The loop has two technical parts: ...
Debug MiniGPT and Backpropagate Matmul
This is a hands-on PyTorch screen with two independent tasks. You share a code editor with the interviewer and are expected to run the code, read trac...
Design the GPU Job Scheduler for a Text-to-Video Generation Service
Design the GPU Job Scheduler for a Text-to-Video Generation Service You are designing the backend that runs generation jobs for a large text-to-video ...
Design a Real-Time Chat System
Design a Real-Time Chat System Design the backend for a real-time one-to-one and group messaging application (think a 1:1 and small-group chat product...
Evaluate AI Workflow Product Metrics
You are the data scientist supporting an AI workflow-suggestion feature in an enterprise cloud product. The feature surfaces recommended workflow acti...
Rate Engineering Work Simulation Responses
You are completing an engineering Work Simulation assessment for an Amazon Software Engineer (SDE) role. The assessment presents realistic on-the-job ...
Object-Oriented Design: Hotel Room Booking System
Object-Oriented Design: Hotel Room Booking System Design the object model and core service for a hotel room booking system. The service must let a cli...
Minimum Path Length Through a Grid With One Allowed Cell Conversion
You are given an m x n grid grid where every cell holds either 1 (an open cell you may stand on) or 0 (a blocked cell). You start at the top-left cell...
Design a Slack-Like Messaging System
Design a Slack-like team messaging system — a real-time collaboration platform organized around workspaces and channels. The system should let users: ...
Design an advertiser metrics tracking platform
Design the core object-oriented model and service interfaces for an advertiser metrics tracking platform. The platform is used by advertisers to track...
Design a personalized news aggregator
Design a Google News-style personalized news aggregator. The system continuously collects articles from many third-party publishers by polling their A...
Implement Backprop for a Tiny Network
Implement and explain the forward and backward pass of a small two-layer neural network for classification — first from scratch with NumPy, then with ...
Design Asset Storage System
Design a high-level storage system for digital assets. The system must store and serve multiple asset types, including text documents, images, and vid...
Build a Compose Rating Card
Build a rating card in Android using Kotlin and Jetpack Compose. The card lets a user leave feedback consisting of a star rating and a written comment...