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."
Organize a Product Initiative Across Stakeholders
Organize a Product Initiative Across Stakeholders Prompt Tell me about a time you brought structure to a product or project initiative that involved s...
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...
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...
Minimize Direction Violations in a Directed Road Network
Minimize Direction Violations in a Directed Road Network There are n nodes numbered from 0 through n - 1. Every input edge [u, v] has an original dire...
Design a Dynamically Batched Inference API
Design a Dynamically Batched Inference API Design a high-concurrency HTTP API for language-model inference. Clients submit individual requests, but GP...
Debug Tokenization and Detokenization
Debug Tokenization and Detokenization The source reports a debugging exercise with buggy tokenization and detokenization functions but does not includ...
Self-Attention: Implementation, Complexity, and Efficient Variants
Self-Attention: Implementation, Complexity, and Efficient Variants This round probes how deeply you understand the attention mechanism — not just the ...
Analyze Returning Borrowers Across Two Days of Logs
Analyze Returning Borrowers Across Two Days of Logs You receive two collections of loan-activity records, one for each of two consecutive days. Each r...
Aggregate Recent Message Events And Active Chats
Prepare for a stateful event aggregation coding prompt over chat events and active chats in a rolling five-minute window. The question is useful for d...
Build a Wordle-Style Game in React
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Design a Geolocation Search Service
Design a geolocation search service that returns relevant places or entities near a user. <details> <summary>Hint 1</summary> Start by stating assumpt...
Query Top Played Tracks Globally And By Country
Given a play_events table with columns user_id, track_id, timestamp, and country, write SQL to return the top N most played tracks globally and the to...
Measure Bird Species Segregation
You are a data scientist analyzing bird observations from a forest. The ecology team wants to know whether different bird species are spatially segreg...
Sort Every Concentric Matrix Border Clockwise
Sort Every Concentric Matrix Border Clockwise Given a nonempty rectangular integer matrix, process each concentric layer independently. For a layer, l...
Use a Fitted Line to Predict a Future Data Point
Use a Fitted Line to Predict a Future Data Point You receive observed points (x_i, y_i) and need to predict y for a future input x_future. Assume a pr...
Count Machines and Recover a Distributed Tree Topology
Count Machines and Recover a Distributed Tree Topology A cluster's machines form a rooted tree. Design a protocol that returns the number of machines ...
Diagnose a One-Day Drop in Successful Deliveries
Prompt On one specific day, the number of successful deliveries in a large metropolitan market drops sharply. The alert is about the count, not the su...
Design an Amazon Locker Service
Design a Single-Station Package Locker Design the classes and core workflows for one self-service package-locker station. A delivery driver deposits a...
Design a Collaborative Playlist Editor
Design a Collaborative Playlist Editor Design the data model and APIs for a playlist application. Authorized collaborators can add a song, remove a pl...
Design a Task Scheduler for Opaque Long-Running GPU Jobs ("Design Sora")
This system design question evaluates a candidate's ability to architect a distributed job scheduler and orchestrator for expensive, long-running, GPU...