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."
Prioritizing QA Work Under Deadline Pressure
Prioritizing QA Work Under Deadline Pressure You are a QA / test engineer embedded in a product team. A release deadline is a few days away, and there...
Fix the Broken Search Filter in a Book Catalog API
Fix the Broken Search Filter in a Book Catalog API A small book-management web app lets users search a library catalog. The frontend sends the user's ...
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. The product offers m...
Design an ad frequency capping system
Design a real-time ad frequency capping system for an ads platform. When the ad server is deciding whether to show an ad to a user, it must enforce ca...
Simulate Infection Spread on a Grid
You are given an m x n grid representing cells in a population. Each day, all state changes happen simultaneously. Infection neighbors are the 8 surro...
Design a news aggregator system
Rippling Onsite — Two Parts This Software Engineer onsite has two parts: a system design and a short coding follow-up. Both are below. Treat them as o...
Explain Modern Python Features and Ecosystem
You are interviewing for a senior Python software engineering role. The interviewer is probing the breadth and depth of your Python knowledge: not jus...
Design a Donation Platform
Question Design an online donation platform that lets users discover and contribute to charity campaigns or nonprofit organizations. Payment execution...
Explain code complexity and design two games
You are given three independent interview prompts. 1) Code comprehension & complexity - Given two short code snippets (language-agnostic), explain in ...
Find the Index Range of a Target in a Sorted Array
Given a sorted (non-decreasing) array of integers nums and an integer target K, find the index range [first, last] where K appears in nums: - first is...
Minimum Canisters to Top Up an Exact Target
Minimum Canisters to Top Up an Exact Target During a layover, the ground crew must top up an auxiliary tank by exactly target units of coolant before ...
Generate a ride map image via POST API
You are given a local JSON file ride-simple.json containing a recorded bike ride as an ordered list of GPS points. Your job is to turn this ride into ...
Design GPU credit allocator
Design a GPU Credit Allocation System Design a GPU credit allocation system for a multi-tenant compute platform (for example, OpenAI's GPU infrastruct...
Review Code for Memory Risks
You are the reviewer on a pull request that adds a new utility to a production frontend codebase. The utility deduplicates an array using an object as...
Find a Valid Task Execution Order with Dependencies
You are building the task scheduler for a CI/build system. There are n build tasks labeled from 0 to n - 1. Some tasks cannot start until certain othe...
Debug a Concurrent Job Scheduler
You are handed a buggy Python job scheduler that runs many independent jobs concurrently. Each job has an ID, a callable to execute, a maximum retry c...
Design a user behavior tracking system
Problem Design a User Behavior Tracking System that collects and analyzes user events from mobile and web applications across multiple products. The s...
Add One to Digit Array
You are given an array of decimal digits representing a non-negative integer. The most significant digit is at index 0, and the array contains no lead...
Solve Rooms and Top-K Streams
You are asked to solve two independent coding problems. Problem 1: Minimum concurrent meeting rooms Given a list of meeting time intervals intervals, ...
Design a Thread-Safe Shared Counter
Design and implement a per-key call counter: a component that tracks how many times each distinct key has been seen. The API is a single method, for e...