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."
Validate Sorted Order Under a Custom Alphabet
A distant colony uses the same 26 lowercase English letters as we do, but their alphabet is arranged in a different order. You are given that ordering...
Build a Candidate Search System
Build an end-to-end candidate search system for recruiting. Given a job posting, your system must return the best-matching candidates from a candidate...
Design Human Avoidance for Warehouse Robots
Design a software module that lets an autonomous warehouse robot avoid humans while it navigates. The robot drives indoors among shelves and people, p...
Analyze Subscription, Insurance, App, and Card Cases
You are in a Data Scientist "power day" interview for a product analytics role. The interviewer gives you four independent business cases. For each on...
Design a 2048 Game
Design the object model and core game logic for a 2048 game on an N x N grid. This is an object-oriented design problem: focus on the classes, their r...
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...
Compute Commuter Ride Probabilities
A commuter takes two trips on a given day: one morning commute to work and one evening commute home. On each trip they either use Lyft or they don't. ...
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...
Design an LLM-Based Conversational Assistant (Chatbot)
Design an LLM-Based Conversational Assistant (Chatbot) In a research-design round you are asked to design the model and system behind a general-purpos...
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...
Object-Oriented Design: Snake Game
Object-Oriented Design: Snake Game Design the object-oriented model and core logic for the classic Snake game. The snake lives on a 2D grid of fixed w...
High Availability and Failover for a Primary-Replica Database
High Availability and Failover for a Primary–Replica Database Your team owns the relational database platform that backs a high-traffic transactional ...
Build a Churn Prediction Model
You are asked to build a churn prediction model for a consumer product. The business wants to proactively identify users who are likely to churn so th...
Design an LLM API pipeline
You are asked to build a small application feature that calls a hosted large language model (LLM) API to solve a user task. The interviewer is not int...
Implement Masked Multi-Head Self-Attention
Implement the core self-attention module used inside a Transformer encoder, from scratch, in a deep-learning framework of your choice (PyTorch-style p...
Design Ad Frequency and Order Tracking
Design two components of an ads platform. This is a two-part system-design question: Part 1 is a real-time frequency-capping service used during ad de...
Design an extensible poker-hand evaluator
Design and implement an object-oriented solution for a simplified two-player poker-like game called Camel Cards. The interviewer is explicitly evaluat...
Design a Parallel Image Processor
Design an image-processing component that applies one or more filters to an image and produces a new image. An image is a 2D grid of pixels (with one ...
Design Video Intelligence for Investigations
Design a law-enforcement video intelligence system that helps investigators search, reason over, and locate evidence-relevant moments across very larg...