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."
Debug and Extend Cursor Queries
You are in an AI-assisted coding interview. You may consult AI-generated suggestions, but you are expected to validate them, explain your reasoning ou...
Design an in-memory banking system
Implement an in-memory banking system (e.g., in Java) that supports the following operations on user accounts. Assume user IDs are unique strings and ...
Design a RAG question-answering system
Scenario Design a Retrieval-Augmented Generation (RAG) system that answers user questions using an internal document corpus (e.g., product docs, polic...
Design Search And Web Crawling Systems
You are asked to design two distinct large-scale systems in a single system-design interview loop: a Facebook-like search product and a distributed we...
Infection Spread on a Grid (Cellular Automaton)
Infection Spread on a Grid (Cellular Automaton) You are simulating how an infection spreads across a 2D grid of cells over a sequence of discrete time...
Write SQL for top categories and highly active users
You are given three tables: 1) impression Event-level table of user impressions. - impression_id BIGINT (PK) - user_id BIGINT (FK → user.user_id) - pi...
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...
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...
Consolidate On-Call Rotation Segments
You are given an array of on-call rotation intervals. Each interval has the form: `text {name: string, start: int, end: int} ` Each interval is half-o...
Defend a Research Direction and Experiment Design
You are interviewing for a research-focused Machine Learning Engineer role at a frontier AI lab. The onsite includes a collaboration / research-discus...
Design Real-Time Driver Pay Aggregation
Design a production system that ingests a high-volume stream of delivery-order events and continuously computes each driver's (Dasher's) daily pay. Th...
Analyze matrix multiplication complexity
In an ML coding interview, you're handed a PyTorch file and asked a series of complexity questions about the operations in it. One of them: Given two ...
Explain How You Build Team Trust
In a leadership or behavioral interview for a Software Engineer role, the interviewer opens by saying they do not want to discuss technical details. I...
Design a deck of cards with shuffle/draw
Object-Oriented Design + Randomness: A Deck of Cards Design an in-memory model of a standard 52-card playing deck. Your design will be exercised by cl...
Explain XGBoost's Overfitting Resistance
A single, unpruned decision tree can recursively partition the training set until its leaves describe individual training points, which makes it a hig...
Explain Spark Execution and Optimization
You are interviewing for a Data Engineer role. In a 30-minute discussion on production data engineering, the interviewer probes how well you understan...
Design a Perishable-Goods Inventory and Location Tracking System
Design a Perishable-Goods Inventory and Location Tracking System Design a backend service that tracks perishable items across a retail network and rep...
Implement stream queries and bounded-difference subarrays
Solve both coding tasks. Task 1: Track the first non-repeated number in a stream Design a data structure that supports a stream of integers. Implement...
Build a Reliable Streaming Chat UI
You are building a React-based chat interface where assistant responses stream into the UI token by token in real time (the same UX as a typical LLM c...
Design Real-Time Trending Likes
Design a real-time analytics service for a large social platform. The service receives like and unlike events for posts. It must support the following...