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 Neighborhood Newsfeed System
Design a neighborhood-based social newsfeed system similar to Nextdoor. Users belong to a verified physical neighborhood and see a personalized home f...
Explain Backend Fundamentals and AI Tooling
You are interviewing for a backend engineering summer internship on a content-safety team (ByteDance / TikTok). This is the technical first round: the...
Debug a Concurrent Job Scheduler
You are handed a buggy Python job scheduler that runs many independent jobs concurrently. Each job has an ID, a callable to execute, a maximum retry c...
Solve Three Array and Matrix Path Problems
You are given three independent coding tasks. For each task, design an algorithm, implement it, and analyze its time and space complexity. 1. Find the...
Solve probability and game-theory puzzles
You are interviewing for a quant trading internship. Work through the following probability and game-theory puzzles. There is no need to answer instan...
Design a Crash-Resilient LRU Cache
You have an in-memory LRU cache with fixed capacity $N$ and the standard get(key) / put(key, value) operations, both $O(1)$ (a hash map plus a doubly ...
Compute Plant Infection Time
You are given an m x n grid representing a garden. Each cell is one of the following: - 0: empty ground - 1: a healthy plant - 2: an infected plant - ...
Build a GPU VM Fleet CLI
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Define Product Health and Experiment Design
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Find Shortest Unique Prefixes
Given a list of distinct non-empty words, return the shortest unique prefix for each word in the same order as the input. A prefix of a word is consid...
Design an Ad Assignment API
Design an HTTP API that exposes an ad-assignment function as a production service. The underlying function is given a user, a list of browser position...
Review Code for Memory Risks
You are the reviewer on a pull request that adds a new utility to a production frontend codebase. The utility deduplicates an array using an object as...
Design Collaborative Document Editing
Design a web-based collaborative document editing system similar to Google Docs. The system should allow multiple users to create, edit, and share ric...
Build a React Parking Lot Manager
Build a React single-page application that a parking-lot attendant can use to run a small lot from a single screen. The lot has a configurable number ...
Build a React naval board
Build a simplified, single-player Battleship-style game board in React. There is no opponent, no turn-taking, and no networking — you are implementing...
Design a news aggregator system
Rippling Onsite — Two Parts This Software Engineer onsite has two parts: a system design and a short coding follow-up. Both are below. Treat them as o...
Design RAG Retrieval for Data Assets
Design the retrieval component for an internal AI coding/analytics assistant. When a user asks a data-related question, the assistant must identify th...
Implement a Unique Lines Command
Implement a simplified version of the Unix uniq command. Given an input text file, output the file contents with consecutive duplicate lines collapsed...
Design a DAU/MAU metrics system
Question Design a system that computes and serves product engagement metrics — DAU (Daily Active Users) and MAU (Monthly Active Users) — for a large c...
Design a user behavior tracking system
Problem Design a User Behavior Tracking System that collects and analyzes user events from mobile and web applications across multiple products. The s...