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."
Update a Neuron Grid
You are given an m x n integer matrix neurons. - A cell is a firing neuron if its value is 0. - A cell is a non-firing neuron if its value is greater ...
Design a Shared Todo App
Design an online application for sharing todo lists with other users. The interviewer asked for: - the core product requirements and user flows, - bac...
Implement Employee Validation and Snake
This interview covered two coding tasks: 1. Employee validation - Implement a function that validates a collection of employees against a set of bu...
Implement and derive backprop from scratch
Tiny Neural Network From First Principles: Binary Classification Implement and analyze a minimal neural network for binary classification with a singl...
Find Common Prefix Across Strings
Given an array of strings, return the longest string prefix that is shared by every string in the array. A prefix must start at index 0 of each string...
Explain LLM post-training methods and tradeoffs
You are asked about LLM post-training (after pretraining on large corpora). Explain a practical post-training pipeline for turning a base model into a...
Maximize coins with tokens moving by +3
You are given a 1D board represented by a string s of length n. Each character is one of: - '.' — an empty cell - 'C' — a cell containing exactly one ...
Design an object store with deduplication
System Design Prompt Design a simplified cloud object storage service (similar to an object store) that allows users to upload and download files. The...
Model data for an ads platform
Design a data model (logical schema) for an advertising platform. Include core entities such as: - Business/account (advertiser) - Campaign and budget...
Find minimal rate k and subset sum
Question LeetCode 875. Koko Eating Bananas — Given vault sizes [3, 6, 7, 11] and time h = 8 hours, find the minimum integer rate k (vault units per ho...
Minimize Travel Assignment Cost
You are given n people who each need to travel to exactly one of two cities: San Francisco or New York. The input is an array costs, where costs[i] = ...
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...
Should WhatsApp launch group calls?
WhatsApp currently supports only one-to-one calling and is considering launching group calling for personal users. The product goal is to increase eng...
Traverse an Org Chart by Level
You are given an organization's reporting structure as a flat list of employee-manager relationships. Exactly one employee is the root (the CEO) and h...
Implement Dependency-Aware Task Scheduler
Design and implement a task scheduler that supports adding tasks and consuming executable tasks in deadline order. Each task has: - taskId: a unique i...
Find Each Cell's Nearest Source
Given an m x n grid containing 1 for source cells and 0 for regular cells, compute for every cell the shortest 4-directional distance to any source ce...
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...
Handle customer engagement and manager-rating questions
In a behavioral round focused on customer engagement / leadership principles, you are asked questions like: - “Tell me about a time you worked directl...
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...
Design Transaction Data Quality Checks
You own data quality for the same credit-card transaction dataset. transactions | column | type | description | |---|---|---| | transaction_id | integ...