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."
Explain seasons and compound interest
Answer the following basic reasoning questions: 1. Why is summer generally hotter than winter? 2. Suppose you invest $1,000 at a 100% annual interest ...
Design a Parking Lot
Problem In an AI-assisted coding round, design the core object model and APIs for a parking lot system. The system should support: - Multiple floors, ...
Design follow/follower classes
Object-Oriented Design: Follow / Follower Relationship Design a small set of classes for a social product where users can follow and unfollow each oth...
Design several large-scale systems
The interview note listed several system design prompts. For each one, discuss functional requirements, APIs, storage, scaling, consistency, fault tol...
Design an app-store app recommendation system
You are building an app recommendation system for a mobile app store. Goal Recommend apps to a user on surfaces such as: - Home feed / “Recommended fo...
Design a Real-Time Sensor Intelligence System
Design an end-to-end real-time sensor intelligence system for a product team. Start from ambiguous product requirements and cover the full lifecycle: ...
Design a Twitter-like microblogging service
Design a Twitter-like microblogging system. You can describe it verbally and with structured notes. Requirements: - Users can post short messages. - U...
Implement a Spreadsheet With Formulas
Design and implement a small spreadsheet engine. Part 1: Basic cells Implement a Spreadsheet class that supports: - set_cell(cell_id, value): set a ce...
Design a follower push-notification system
Design a notification system for a social product: - When a user publishes a new post, the system should send push notifications to that user’s follow...
Build an Ollama Eval Harness
Design and implement a lightweight evaluation harness for a language model served locally through Ollama. The harness should: - Read a dataset of eval...
Implement string formatting and request tracking tasks
You are given several small coding tasks. Implement each as described. Task A — Convert snake_case to camelCase Write a function that converts an iden...
Search Words in a Character Grid
You are given a 2D grid board of lowercase English letters with m rows and n columns. A word can be constructed from letters of sequentially adjacent ...
Drone Circular Route — Minimum Total Travel Cost
Drone Circular Route — Minimum Cost Tour A delivery drone must visit every hub in a network exactly once and then return to its starting hub, forming ...
In-Memory URL Shortener: Encode and Decode
Implement an in-memory URL shortener that can encode a long URL into a short URL and decode that short URL back to the original long URL. Design a cla...
Implement a Vending Machine
Design and implement the core logic for a vending machine using object-oriented principles. The machine stores products, accepts bills, tracks the cur...
Measure scheduled posts feature success
Facebook is considering launching a new feature that allows users to schedule a post to be published at a future time. The product hypothesis is that ...
Design Uber Eats Restaurant Recommendations
Design a restaurant recommendation system for the Uber Eats home page. A user opens the Uber Eats app and should see a ranked feed of restaurants avai...
Design a File Backup System
Design a scalable file backup system. You are given access to basic file-system primitives such as listing directories, reading file metadata, reading...
Find Optimal Property Combination
You are building a reservation-matching system for short-term rentals. Each property has: - id: a unique identifier - neighborhood: the neighborhood w...
Optimize least-k revenue queries for read/write load
Follow-up Scenario Now assume revenue is not provided as a flat list of events, but may be nested, for example: - Each customer has many orders, and e...