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 Premium Product Recommendations
Design an ML/AI-powered recommendation system for Intuit that recommends premium products, upgrades, offers, or educational content to users, with the...
Prepare for a Frontier AI Recruiter Screen
You are interviewing for a senior or staff-level software engineering role at a frontier AI company (the original poster was screening at Anthropic). ...
Explain Transformer and MoE Fundamentals
You are interviewing for a Machine Learning Engineer role. The interviewer is probing your foundational understanding of modern deep-learning and larg...
Evaluate Biker Feature Success
DoorDash is considering launching Biker Mode, a feature for Dashers who deliver by bicycle. Biker Mode may help bicycle Dashers identify suitable shor...
Debug a GRPO training loop and explain ratios
You are given a simplified implementation of a GRPO (Group Relative Policy Optimization) training step for an RLHF-style policy model. The training is...
Build a Churn Prediction Model
You are asked to build a churn prediction model for a consumer product. The business wants to proactively identify users who are likely to churn so th...
Implement Cache and Count Components
You are asked to solve two independent coding problems in this session, each followed by a short discussion. This mirrors a 60-minute Amazon SDE codin...
Infection Spread Simulation with Death Threshold
You are given an m x n grid that simulates the spread of an infection over discrete days. Each cell holds one of four states: - 0 — uninfected (health...
Build a Candidate Search System
Build an end-to-end candidate search system for recruiting. Given a job posting, your system must return the best-matching candidates from a candidate...
Design Calendar Event Conflict Handling
Design the event settings and conflict-handling system for a large-scale calendar product similar to Google Calendar. Users can create, update, and de...
Implement a Banking System
Design and implement an in-memory banking system. All operations are processed in non-decreasing timestamp order. Account identifiers are strings. Mon...
Design Human Avoidance for Warehouse Robots
Design a software module that lets an autonomous warehouse robot avoid humans while it navigates. The robot drives indoors among shelves and people, p...
Design Scalable Expense Violation Processing
Design a Scalable Expense-Policy Violation Engine You are building the production version of a corporate-card policy system. Companies issue corporate...
Design and Interpret an A/B Test
You are a data scientist evaluating a product experiment for a grocery-delivery marketplace. The experiment has three arms: a control group and two tr...
Investigate a 7% Monthly Active Riders Drop and a 20% Wait-Time Increase
You are a data scientist on the rider growth team at a ride-hailing company. During a routine business review, two separate metric movements are flagg...
Design GPU inference request batching
Design a system that serves online model-inference requests on GPUs. Requests arrive one at a time from clients, but GPU throughput is far higher when...
Enumerate 4x4 Tic-Tac-Toe Games
You are given an empty $4 \times 4$ board. Two players, X and O, alternate turns with X moving first. A player wins as soon as they place three of the...
Backend Fundamentals Deep Dive: MySQL Internals, Redis, and the HTTP/HTTPS Request Lifecycle
This is a backend-fundamentals rapid-fire round covering MySQL internals, Redis internals, and the HTTP/HTTPS request lifecycle. Work through each par...
Design a Distributed Crossword Solver
Design a scalable, distributed service that solves crossword-style fill-in puzzles. A request contains a rectangular grid with blocked cells, empty ce...
Design a Conversation Log Ingestion Pipeline
Design a daily batch data pipeline that loads conversation logs into a warehouse for analytics. Every day, a single JSONL file lands in object storage...