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 trip booking REST API and schema
Design a RESTful API for a guest to book a trip. Include: - Core endpoints (search availability, create booking, view/cancel booking, payment/confirma...
Design a hybrid-cloud GPU allocation service
System Design: Hybrid-Cloud GPU Resource Allocation & Job Management Design a service that allocates and manages GPU resources for ML training jobs in...
Design Composable Event Recommendations
Build a flexible event recommendation engine for a ticket marketplace. You are given these domain objects and services: - Event(id, name, city, date) ...
Improve Trust in a RAG System
You own an enterprise retrieval-augmented generation system used for high-stakes document question answering, such as mortgage underwriting, legal rev...
Design Product Notification and Autocomplete Experiments
You are interviewing for a Product Data Scientist role at Discord. Answer both product experimentation case studies below. Case 1: Subscription notifi...
Compute nearest bathroom distance for each desk
You are given an m x n grid of characters containing only: - 'B' = bathroom - 'D' = desk - '_' = empty cell From any cell you may move one step up/dow...
Design an Accurate Click Aggregator
Design an ad click aggregation system. The system receives click events from multiple sources, including web, mobile apps, and TV devices. It must ing...
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...
Explain how to understand a large codebase fast
You are given an unfamiliar, large codebase with many classes and modules. You may use an IDE (jump-to-definition, find usages, call hierarchy) and AI...
Design an async job system and cache layer
Design two systems. You can assume a large-scale production environment; focus on clear APIs, data models, scaling, reliability, and trade-offs. Part ...
Should Uber double member discounts?
Uber is considering increasing the member discount on rides from 5 percent to 10 percent. This can affect rider demand, driver supply, marketplace bal...
Design Emergency Notification System
Design a disaster or emergency notification system for an organization such as a city government, university, or large company. The system should allo...
Build cold-start restaurant ratings
Uber Eats wants a cold-start rating system for newly onboarded restaurants before they accumulate enough real reviews. You are asked to design the mod...
Debug Kubernetes crashes and review Python ingestion script
Part A — Kubernetes: Pod/Container Crash Debugging You are on call and a service deployed to Kubernetes starts failing. The Pod shows CrashLoopBackOff...
Design a job scheduler with SLA and logs
Scenario Design a distributed job scheduler that runs scheduled (time-based) jobs only (e.g., cron/interval). Each job execution has an SLA: if the ru...
Design a group chat system
System Design: Group Chat Design a scalable group chat system (like a basic Slack/WhatsApp group chat). Core features - Users can create groups, join/...
Solve these algorithmic problems
You are given the following independent coding tasks. For each task, design an algorithm and implement a function that returns the requested output. -...
Compute servers needed for daily recurring jobs
You operate a cluster of identical servers that run recurring daily jobs. For a single day, you are given a list of job execution intervals. Each inte...
Design a ChatGPT-like conversational assistant
Design a ChatGPT-like conversational assistant product. Assume you need to support: - Multi-turn chat with conversation history - Streaming responses ...
Implement Notification Rate Limiter
Implement should_send_notifications(user_id, timestamp) -> bool. You are given two mappings: - each user_id belongs to exactly one team_id - each team...