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."
Compute effective permissions on DAG and prune tree
Problem A — Effective allow/disallow letters on a DAG You are given a directed acyclic graph (DAG) with n nodes labeled 0..n-1. Each node u contains t...
Debug a transformer training pipeline
Debug a Transformer training pipeline You are handed a PyTorch Transformer encoder–decoder training pipeline that misbehaves. The pipeline includes to...
Calculate Triangle Probability From Broken Stick
A stick of length 1 is broken into three pieces by choosing two cut points independently and uniformly at random along the stick, then sorting the two...
Present a Marketplace ML Project Deep Dive
In a Machine Learning Engineer interview for a pricing, marketplace, or growth team, present a recent representative ML project. Your deep dive should...
How do you handle an LLM agents interview?
You have an interview on your agenda titled “Agents Interview.” Explain how you would approach this interview if it is about designing and evaluating ...
How to test bike delivery?
You are a data scientist at a food-delivery marketplace. The company is considering launching a bicycle courier delivery option in selected cities. De...
Design a high-concurrency LLM inference service
You are designing an LLM inference platform that serves interactive user requests (chat/completions) on GPUs. Goals - Support high concurrency with pr...
Java Core Deep Dive: Concurrent Collections and Java 8 Features
Java Core Deep Dive: Concurrent Collections and Java 8 Features You are interviewing for a backend engineering role on a team that builds high-through...
Optimal Commute: Nearest Transit Distance in a City Grid
Optimal Commute: Nearest Transit Distance in a City Grid A downtown is modeled as an m x n grid city. Each cell holds one of three values: - 0 — an op...
Most Active Users in a Live Communication Stream
Most Active Users in a Live Communication Stream You are processing a continuous stream of pairings between users. Each event is an unordered pair (u,...
Solve Expression and Tree-List Problems
The coding portion included two algorithm problems: 1. Generate expressions with left-to-right evaluation Given a string num containing only di...
Solve Two Robbery Optimization Variants
You are asked to solve two related optimization problems. Part 1: Linear street You are given an array values, where values[i] is the amount of money ...
Implement a Referral Network
Implement a referral network in three parts. You are building an in-memory model of a directed referral graph. An edge A -> B means user A referred us...
Design an Online Game Leaderboard
Question Design the backend system for an online game's leaderboard. The system should support: 1. Recording and updating player scores from game sess...
Model other agents in simulation
Scenario You are building a driving simulation environment for training/evaluating an autonomous agent (planning or RL). Besides the ego vehicle, the ...
Present a Project and Reflect
Prepare a short presentation about a project you worked on closely. Your answer should cover: - the problem statement and why it mattered - the contex...
Determine identical files ignoring metadata
Question How would you determine whether two files contain identical bytes while ignoring all filesystem metadata? Propose and justify a hashing-based...
How do you lead under risk and uncertainty?
Answer the following engineering leadership questions (EM/Senior level). Use specific examples. 1. Tell me about a time you rejected a technically exc...
Design demand-side ads relational tables
You are designing the core relational data model for a demand-side advertising system. Create a normalized schema (tables + key columns + relationship...
Design a free-month experiment
An online subscription product is considering a promotion that gives eligible new users their first month free instead of charging immediately. Design...