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 streaming mention analytics with search and alerts
Scenario You ingest a real-time external stream of social-media posts and news articles. Each item contains raw text and metadata (timestamp, source, ...
Design a RAG system with evaluation
Scenario Design a Retrieval-Augmented Generation (RAG) system that answers user questions over a private corpus (internal docs, PDFs, knowledge-base a...
Implement Game Metadata Lookups
You are given a list of game metadata records. Build an in-memory representation that can store each game's name, release date, platforms, genre, publ...
Evaluate NLP Classification Models
You are interviewing for a Data Scientist internship at Amazon. The interviewer asks you to walk through how you think about an NLP classification pro...
Implement Layer History and Grid Counting
The coding portion of this loop covered two independent tasks. Implement each cleanly, handle the edge cases, and analyze the time and space complexit...
Implement 2048 Game Logic
Implement the core movement logic for the 2048 game. You are given an n x n integer board where 0 represents an empty cell and every nonzero value rep...
Design a one-to-one chat system
Design a one-to-one (1:1) chat system for a web application — the kind of direct-messaging feature where two users can send each other text messages i...
Evaluate Promotions for Uber Eats Users
Uber Eats wants to send promotions or coupons to its users (for example, "$5 off your next order" or "20% off, minimum basket $15"). You are the data ...
Implement an In-Memory File System
Implement an in-memory file system directory management tool. Your tool should support the following operations: 1. Create a file in a directory. 2. C...
Implement Courier Delivery Cost Tracking
Design and implement a small in-memory cost-tracking service for food-delivery couriers. Each courier has a unique driverId and an hourlyRate. A deliv...
Design an RBAC Relational Schema
Design a relational database schema for role-based access control (RBAC). Your design should model the following concepts: - User: a person or service...
Count Candies from Unlockable Boxes
You are given an object-oriented representation of boxes in a house. Initially, exactly one box is physically accessible. Each Box has: - A unique id....
Design real-time kitchen order fulfillment system
Backend Engineering Challenge: Real-time order fulfillment Design and implement (conceptually) a single-process, real-time backend system for fulfilli...
Explain Transformer Attention Fundamentals
In a machine learning fundamentals interview, explain the core mechanics of Transformer models and modern large language model (LLM) training. The int...
Minimize Circular Redistribution Cost
You are given n warehouses arranged in a circle. products[i] is the number of products initially stored at warehouse i. You may choose exactly one glo...
Design an AI Gateway
Design an AI gateway service that sits between product teams and multiple third-party model providers. The gateway should expose a unified API for cap...
Describe Deadline, Mistake, Problem-Solving, and AI Experiences
You are interviewing for a Software Engineer (Intern) role at Amazon, in an on-site loop of two back-to-back 60-minute rounds. Each round mixes a beha...
Fix the Password Reset Workflow
You are given a small code repository that implements a password reset flow. The repository ships broken: several bugs prevent the application from wo...
Calculate Bowling Game Score
Implement a function that calculates the total score of a complete ten-pin bowling game. Input: a list of integers rolls, where each integer is the nu...
Design a pub-sub replay system
Assume you have a distributed publish-subscribe messaging system with topics, publishers that write messages, and subscribers that consume them. Desig...