Openai Interview Questions
Practice 200 real interview questions from Openai. Covers Coding & Algorithms, System Design, ML System Design, Machine Learning. For roles including Software Engineer, Machine Learning Engineer, Data Scientist, Product Manager.

"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 Hosted Notebook Platform
Design a hosted notebook platform for interactive code execution, similar to a cloud-based notebook service. The system must support 500,000 concurren...
Implement Backprop for a Tiny Network
Implement and explain the forward and backward pass of a small neural network using both NumPy and PyTorch tensors. Start with a batched input X of sh...
Filter Bad Human Annotations
You are given a training dataset labeled by human annotators, but some annotations are low quality, inconsistent, rushed, adversarial, or simply wrong...
Design a Distributed Crossword Solver
Design an online service that solves crossword-like word puzzles. A user submits a puzzle description that includes the grid layout, blocked cells, an...
Design a sandboxed cloud IDE
System design: Sandboxed cloud IDE (Colab-like) Design a multi-tenant, browser-based cloud IDE/notebook that lets users run code in an isolated sandbo...
Design a Multi-Tenant Online IDE
Design a browser-based online IDE for multiple enterprise tenants. Each tenant is an organization with its own users, projects, source files, secrets,...
Design Mobile Model Usage Quotas
Design the mobile and backend API flow for controlling access limits to different AI model versions in a ChatGPT-like mobile app. Requirements: - The ...
Build a Compose Rating Card
Implement an Android rating card using Kotlin and Jetpack Compose. Requirements: - The card lets the user provide a star rating and a written comment....
Design Duplicate File Detection
Design a system to find duplicate files. Start with a single-machine version: given a large directory tree, identify groups of files that have identic...
Implement an Extensible Chatbot App
Implement a ChatApp class that processes user messages and bot responses. The system should support multiple bot types. The design must be extensible:...
Debug a Broken Transformer
You are given a Transformer model implementation that does not train correctly. Describe how you would debug it systematically from data input to opti...
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 annotators, ...
Convert IPv4 Ranges to CIDR Blocks
Implement a function that summarizes a consecutive IPv4 address range using the smallest possible list of CIDR blocks. You are given: - start_ip: a va...
Design a Cloud DevBox Platform
Design a cloud DevBox platform: a service that provides developers with disposable or persistent remote development machines accessible through a brow...
Design an AI playground editor
Design a full-stack AI playground web application similar to a chat product, but with one document-like component that interleaves user prompts and mo...
Write SQL for repeat churn
Write a SQL query to measure the performance of a free-month promotion experiment. Assume experiment_users already contains only users who were eligib...
Design a Real-Time Chess Service
Design an online chess service that supports real-time two-player games. The system should allow users to create or join a chess game, make legal move...
Minimize deaths in spreading plant infection
You are given an m x n grid representing a garden: - 0: empty cell - 1: healthy plant - 2: infected plant The garden evolves day by day in the followi...
Debug Transformer and Add KV Cache
You are given a small decoder-only transformer implementation for autoregressive language modeling. Part 1: Debugging The training code contains four ...
Design an Extensible Simulation Engine
Design and implement an object-oriented simulation framework for a two-player, turn-based game similar to tic-tac-toe. The system should initialize ga...