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."
Deduplicate an Array in Linear Time
Given an array of primitive values such as numbers or strings, implement a function that returns a new array with duplicates removed while preserving ...
Solve Multiple Coding Interview Problems
The interview included the following independent coding tasks. Solve each task, explain edge cases, and analyze time and space complexity. 1. Minimum ...
Why Airbnb and what matters most
Answer this values-oriented behavioral prompt set: - Why do you want to work at Airbnb? - What do you think is one of the biggest problems in the worl...
Design photo and listing quality models
Discuss how you would solve the following two machine learning product problems for a travel marketplace. 1. Improve booking performance by selecting ...
Design batch and streaming ETL architecture
Design batch and streaming ETL architecture System Design: End-to-End Data Platform for Product Analytics (Batch + Near-Real-Time) Context Design a sc...
Design a scalable payment system
Design a scalable payment system Design a scalable payment system. The system must support both peer-to-peer money movement between users and merchant...
Design and implement a tiny language runtime
Design and implement a tiny language runtime Minimal Imperative Language — Design and Implementation Task Context You are asked to design and implemen...
Design comment ranking
Design a large-scale ranking system for ordering comments under a post on a community platform similar to Reddit. When a user opens a post, the system...
Design an async API with idempotency
System Design: Asynchronous API Call With Idempotency Design an HTTP API that triggers a long-running operation (seconds to minutes) against downstrea...
Solve two grid problems (islands + min-cost path)
You are given two separate coding questions. Problem A: Count distinct islands (translation-equivalent) Given an m x n binary grid grid (0 = water, 1 ...
Handle security vs velocity conflicts across teams
Describe a time when you had to balance security requirements with business/product delivery speed, especially involving cross-team collaboration. Inc...
Decrypt a twice-encrypted message using known pairs
Three people pass notes A → B → C → A. Notes are encrypted using a character-substitution cipher (a one-to-one mapping per character). You are given t...
Engineer and Impute ZIP Features
Question You are building a predictive model for a product team. For some users you have address fields such as street, city, state, and ZIP code. Man...
Describe motivation, ownership, and conflict
Expect behavioral and culture-fit questions such as: - Why do you want this role or company? - Tell me about a time you showed ownership without being...
Implement bus route simulation features
Bus Route Simulation – Boarding, Capacity, and Priority Passes You are given a partially implemented codebase for simulating bus routes in a city. Bus...
Design article voting and flip-tracking system
Design an object-oriented "Article System" that supports voting and query operations. You need to design the data model and core APIs (including metho...
Use confusion matrix to choose model metric
Scenario You built a binary classifier (e.g., fraud detection, churn risk, medical screening, spam). You are given a confusion matrix on a validation ...
Design an image-to-multilanguage translator
Scenario Design a service that lets users upload an image containing text (e.g., a menu, screenshot, street sign), and returns the same image with the...
Design NL-to-Formula assistant for Airtable
Question Design an ML-powered assistant for a no-code table product like Airtable that converts a user's natural-language request into a formula expre...
Design an On-Demand Delivery Platform
Design an on-demand local delivery marketplace for restaurants or grocery stores. The platform should support customers browsing merchants, building s...