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."
Count Islands After Land Additions
You are given an initially empty m x n grid filled with water. Land is added one cell at a time. Implement a function that receives: - m: number of ro...
Simulate a Rank-Based Tournament
You are given an array ranks, where ranks[i] is the rank of player i in the initial bracket order. A smaller rank value means a stronger player. The t...
Find Shortest Grid Path
You are given an m x n grid where 0 represents an open cell and 1 represents a blocked cell. You are also given a start cell (sr, sc) and a target cel...
Debug and extend a streaming chat app
Scenario You are given a small codebase for a web chat UI that calls an LLM API (similar to a ChatGPT-style interface). You can run it locally. During...
How would you improve card-type detection?
Scenario You have a service that needs to determine a credit/debit card network/type (e.g., Visa, Mastercard, AmEx, Discover, etc.) from the card numb...
Find linked user records by similarity
You are given a list of user records. Each record has the following fields: - id (integer, unique) - name (string) - email (string) - company (string)...
In-Memory File System: Create, Track Duplicates, and List
In-Memory File System: Create, Track Duplicates, and List Implement an in-memory file system that supports creating files and folders and listing the ...
Design large-scale near-duplicate video detection
Design a product-grade fuzzy (near-)duplicate detection system for a large short-video platform. You need to detect whether an uploaded video is a nea...
Explain ML and statistical modeling
Discuss the following machine learning and statistics topics: - In a supervised learning problem with severe class imbalance, what techniques would yo...
Answer Common Behavioral Questions
Prepare strong responses for these behavioral prompts: - Describe a difficult project you worked on. - Describe a conflict with a coworker and how you...
Implement Plus One
Given an integer represented as an array of digits digits, where the most significant digit comes first, return the array representing the integer plu...
Design access control and heartbeat systems
Design two backend systems. Part A: Door access control system Design a service that manages which people can open which doors. The system must suppor...
Design an Airbnb wallet with holds and payouts
Design and Implement an Airbnb-Style Wallet (Ledger, Holds, FX, Idempotency) Problem Design and implement an Airbnb-style wallet system. This is an OO...
Design a fast host listing metrics page
Design the backend for a host (landlord) listings page. User flow: - Host opens a page showing many of their listings. - Host selects a date range. - ...
Answer common recruiter behavioral questions
In an initial recruiter phone screen, you are asked several standard questions. Prepare structured, interview-ready responses for: 1) Why are you look...
Design a user behavior monitoring system
System Design: User Behavior Monitoring System You are asked to design a monitoring/analytics system that collects user behavior events from clients (...
Describe ownership and failure
Answer the following behavioral questions in a structured way, using specific examples from your past work or research: 1. Tell me about a time you we...
Design an Online Judge and Live Comments
The onsite included two system design prompts: 1. Design an online judge platform where users submit code for programming problems. The system must su...
Design a Cross-Border Money Transfer Service
Design a cross-border money transfer service similar to a consumer remittance product. Users in one country should be able to send money to recipients...
Evaluate credit-limit increase profitability
Business/Analytics Case: Credit Limit Increase Strategy You are a data scientist supporting a consumer credit business. Scenario The company is consid...