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."
Identify and handle race conditions
Concurrency in an In-Memory Key-Value Store and Hit Counter Context and Assumptions Assume you are implementing an in-memory key-value store and a hit...
Analyze and mitigate fake advertiser accounts
Your ads platform suspects there are fake advertiser accounts (fraudulent accounts created to scam users, evade policy, or manipulate spend). You are ...
Implement Recursive React JSON Viewer with Collapse
Implement Recursive React JSON Viewer with Collapse React JSON Tree Viewer (Read-Only, Recursive) Design and implement a React component that accepts ...
Implement Wordle-style word guessing solver
Implement Wordle-style word guessing solver Implement a program to solve a Wordle-style word guessing game. The game has a hidden target word of fixed...
How would you test a price increase?
You are a data scientist at a B2C AI video editing software company (subscription-based, with a free trial and paid tiers). Product leadership is cons...
Find the Unique Element in Pairs
You are given a sorted integer array nums. Every value appears exactly twice, except for one value that appears exactly once. Find and return the valu...
Analyze Product Launch and Creator Engagement
You are interviewing for a Data Scientist intern role at a short-video platform. Use a recent data or machine-learning project from your resume as the...
How to rank statements by likelihood
You are given a "likelihood" / "data interpretation" test. For each question: - You are shown a data representation (e.g., a large table, a scatter pl...
Solve palindrome and missing-number variants
You are asked to solve two coding problems and analyze the time and space complexity of each. 1. Palindrome check Given a string s, determine whe...
Implement a multi-button click detector
Implement a click detector for multiple physical buttons. You receive button state updates as a stream. Each update provides: - button_id (integer) - ...
Design a Slack-like messaging system
Design a Slack-like real-time team messaging system. Requirements: - Users can: - Create and join workspaces. - Create public and private channels...
Compute cart total with best promotion
Assume you are implementing a checkout price calculator for an online shopping cart. You are given: - A list of items in the cart. Each item has: - ...
Design a content moderation system
Design a content moderation system for a large-scale product where users can submit content (e.g., text posts, images, videos, comments, or messages)....
Design a replicated cloud storage service
Design the internals of a cloud storage service (object/blob storage). Focus on storage/infra concerns rather than end-user features. Cover the follow...
Handle conflict, priorities, and ownership scenarios
Behavioral interview prompts Answer the following behavioral questions. Use concrete examples from your experience. 1) Disagreement / conflict - Descr...
Scale Game of Life to huge matrices
You are given starter code for computing one step of a Game of Life–style cellular automaton on a binary grid, but the naive implementation loads the ...
Handle repeated churn in SQL
As part of analyzing the same promotion experiment, you need SQL that handles users who churn and later resubscribe. Assume the following tables: 1. e...
Evaluate UberEATS priority delivery and membership
You are a Data Scientist at UberEATS evaluating two monetization features. Assume the marketplace has customers, merchants, and couriers sharing limit...
Implement a Coin-Constrained Jump Strategy
You are implementing an autopilot strategy for a simple side-scrolling jump game. A character moves forward automatically. On each game tick, your str...
Design game matchmaking and waiting queue
Design a scalable game matchmaking and waiting-queue system You are designing the matchmaking system for a large real-time multiplayer game (think of ...