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 Secure PDF Data Room
Design a virtual data room product that lets companies organize and securely share confidential PDF documents with other organizations. The product sh...
Design a To-Do List Service (CRUD, Auth, Rate Limiting, Caching & API Versioning)
Design a to-do list service. Users sign in, create multiple named lists, and within each list create, view, update, and delete tasks. The service is a...
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 inside an isolated sa...
Build Churn Prediction and Survival Models
Problem Statement You are a Data Scientist working on retention. Describe, end to end, how you would build models to predict and understand customer c...
Evaluate Noisy Data for LLM Post-Training
You are an ML engineer working on post-training a large language model. You are handed a large, noisy dataset assembled from multiple heterogeneous so...
Validate a Shopping Cart
You are building the cart validation logic for a food-delivery application. Implement a function validateCart(cart, catalog) that checks whether a cus...
Design a Local Leader Election System
Design and implement a local leader–follower distributed system. You have several nodes running on a single machine, each as a separate process (or se...
Implement 1NN Embeddings and Forward Pass
Implement a small machine-learning inference pipeline in three parts. You build a vectorized 1-nearest-neighbor (1NN) classifier, a dense neural-netwo...
Discuss Complex Systems and Failure Examples
Behavioral Interview: Complex Systems, Failure, and Deliberate Growth You are interviewing for a Software Engineer role on a Google Cloud team (securi...
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...
Diagnose Declining Email Click-Through Rate
An e-commerce marketplace sends marketing emails to its sellers to encourage actions such as listing more products, joining campaigns, or using promot...
Compute Matrix Prefix Products And Gradients
You are given $N$ square matrices $A[0], A[1], \dots, A[N-1]$, each of shape $D \times D$. Define the inclusive prefix (cumulative) products: $$Y[i] =...
Implement Review Content Moderation
You are given an existing backend service for online reviews (Node.js/Express-style, with a persistence layer where a User model exposes await user.sa...
Design a resilient bootstrap API
Design a Resilient Bootstrap API When a client app loads, it needs to fetch everything required to render the first screen in a single call. That data...
Design a Distributed File System
Design a distributed file system for a cloud service — a POSIX-like storage layer that internal applications and external customers use to store and r...
Design a High-Availability Load Balancer
Design a load balancer that routes HTTP and HTTPS traffic to a fleet of backend service instances spread across multiple availability zones (AZs). The...
Predicting the Next Elevator Call Location
Predicting the Next Elevator Call Location You are a data scientist for a building-operations company. To cut resident wait times, the operations team...
Design a Real-Time Chat System
Design a Real-Time Chat System Design the backend for a real-time one-to-one and group messaging application (think a 1:1 and small-group chat product...
Implement a Unique Pointer and Vector
You are interviewing for a new-grad C++ software engineering role. Implement simplified versions of two common C++ standard-library abstractions, Uniq...
Design a Charity Donation Website
Design a charity donation website that lets donors make one-time or recurring donations to charitable campaigns. The platform integrates with a third-...