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 a compliant multi-tenant analytics platform
Prompt Design a multi-tenant data analysis platform for government and enterprise customers. The interviewer emphasizes that the key challenge is not ...
Evaluate IP Access Rules
You are given a list of IPv4 access-control rules. Each rule consists of: - an action: allow or deny - a CIDR block such as 192.168.0.0/16 You are als...
Design a Real-Time AI Voice System
Design a real-time AI voice system, such as a phone or web-based voice agent that can listen to a user, understand the conversation, generate a respon...
Model Direct-Sold DSP Orders
Design a data model for tracking a direct-sold demand order in a demand-side advertising platform. Context: - The platform manages advertiser demand a...
Implement course scheduling and rate limiter analysis
You are given two independent coding problems. --- Problem 1: Course Scheduling You are planning to take a set of courses and are given prerequisite r...
Design a hotel reservation system
Design an online hotel reservation system. The system should allow customers to search for hotels, view available room types, create a reservation, an...
Implement discounted card purchases
Implement purchase logic for a gem-based card game. There are five gem colors: BLUE, WHITE, GREEN, RED, and YELLOW. Each Card has: - a color represent...
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...
Handle cache-update conflicts in distributed services
Design: Cache–Database Consistency with Concurrent Writers Context You operate a high-throughput service using a cache (e.g., Redis) in front of a rel...
How Would You Optimize a Program
You are given an existing program that produces correct results but is too slow in production. Describe a structured plan to optimize it. Your answer ...
Find Shortest Wiki Click Path
Implement a function that computes the minimum number of clicks needed to navigate from one wiki page to another. You are given two page URIs, start_u...
Optimize a dispatcher’s scheduling data structures
Algorithmic analysis / code review: Dispatcher for memory-constrained scheduling You are given a single-threaded in-memory dispatcher that reacts to t...
Answer Google Behavioral Questions
Question In a behavioral interview for a Data Scientist role at Google, how would you answer the following questions? A strong answer should be specif...
Design exchange–trading system message flow
Design the message contract and flow between a firm's trading system (OMS/EMS) and an external exchange. Assume: - The trading system sends orders and...
Investigate High Memory Usage
You are the on-call engineer for a delivery platform. System context - Couriers use a mobile app to accept and complete deliveries. - The mobile app c...
Compute the Final Robot Score
You are given an array scores, where scores[i] is the score of the i-th robot. Robots repeatedly compete using the following rules: 1. Select the two ...
Compute rainwater accumulation on a height grid
Mountain Rainfall Accumulation You are given an m x n 2D integer grid elevation, where elevation[r][c] is the terrain height at cell (r, c). Assume 1 ...
Design a Food Delivery Cart
Design the cart subsystem for a food delivery platform similar to Uber Eats. The cart should let users: - add, update, and remove items - choose item ...
Design a Book Purchase Broker
Scenario Design a system that accepts a user's request to buy a book by title, ISBN, or another identifier. The request includes a maximum target pric...
Design an Attendance Payroll Service
Design the backend service for an employee attendance system. The service should support: - Employees clocking in and clocking out. - Computing each e...