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 coffee ordering system
System Design: Coffee Ordering System Design a system for a coffee shop (and later a chain of stores) that lets customers order drinks for pickup or i...
Design a PDF-to-Markdown Inference API
Problem Statement Design an inference service that converts PDF files into Markdown. Assume the following building blocks already exist and you do not...
Design a Collaborative Todo List
Design a collaborative todo-list service — think shared lists where teammates add, edit, assign, reorder, and complete items, and see each other's cha...
Design Model Weight Distribution
Design a system that distributes large machine learning model weight files to a fleet of GPU inference workers. A new model version is published as on...
Design a Hierarchical File System
Design a hierarchical file system service from scratch, without relying on an existing blob store or distributed object storage (you must store the ra...
Solve Rooms and Top-K Streams
You are asked to solve two independent coding problems. Problem 1: Minimum concurrent meeting rooms Given a list of meeting time intervals intervals, ...
Improve classifier with noisy multi-annotator labels
Problem You are given a text dataset for a binary classification task (label in $\{0,1\\}$). Each example has been labeled by multiple human annotator...
Define Churn and Design Onboarding Experiment
You are the product data scientist for a consumer app. The team is evaluating a redesigned onboarding flow, and some variants of the new flow may incl...
Fix Thread-Safe Trigger Synchronization
Implement a thread-safe one-shot trigger (a one-time event signal) in Python, then critique a buggy fragment a candidate proposed for it. The trigger ...
Compute Theme Similarity
Implement a small set of Python functions to detect likely pirated Shopify themes by comparing their extracted feature sets using the Jaccard similari...
Design an Uber Eats Cart Service
Design the shopping cart service for a food-delivery platform similar to Uber Eats. The service lets a customer add, update, and remove menu items fro...
Design a Cloud DevBox Platform
Design a cloud DevBox platform: a service that gives developers disposable or persistent remote development machines, accessible through a browser, SS...
Design a Slack-Like Messaging Platform
Problem Statement Design a Slack-like team messaging platform that serves millions of daily active users with low-latency delivery across multiple reg...
Design a Distributed Logging System
Design a Distributed Logging System You are asked to design a distributed logging system for a large microservices platform (think of a ride-hailing c...
Solve Five OA Coding Tasks
This is an online-assessment screen consisting of five independent coding tasks. Each task is self-contained — there is no shared state between them —...
Design a Distributed Rate Limiter
Design a distributed rate limiting service for a public API platform. The service sits on the request path of every API gateway and application server...
Write February Resource Usage Query
You are given two database tables that record per-application resource usage: - cpu_metrics(application_id, dt, usage_percentage) - memory_metrics(app...
Design Employee-to-Employee Distance
Design an employee-to-employee distance system for a large company. The system takes two employees as input and returns a meaningful "distance" (or, e...
Interpret and Regularize Regression Models
You are a data scientist building and interpreting regression models on a product dataset at a marketplace company. The outcome variable is a continuo...
Simulate Infection Spread on a Grid
You are given an m x n grid representing cells in a population. Each day, all state changes happen simultaneously. Infection neighbors are the 8 surro...