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."
Answer Common Behavioral Questions
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Solve String Arrays and Row Deduplication
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Design a Metrics Storage Platform
Design a distributed backend for storing and querying application metrics. The system should collect time-series metrics from many services running ac...
Design several backend components
The interview note also referenced several low-level design and backend design questions. For each prompt, define the core APIs, data model, major cla...
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...
Implement Price-Time Order Matching
Implement a simplified limit-order matching engine for a stock exchange. You receive a stream of orders. Each order has: - order_id: unique identifier...
Solve two coding assessment tasks
The online assessment contained two coding problems: 1. Maximize store revenue You are given an integer array quantity of length n, where quantity[i...
Explain Option Greeks and Futures Pricing
You are interviewing for a quantitative trading or data-focused role. Answer the following market fundamentals questions clearly and quantitatively. 1...
Design a Ride-Hailing Platform
Design a large-scale ride-hailing platform similar to a taxi-booking app. The system should allow riders to request trips, match them with nearby driv...
Design a Ride Scheduler
Design an object-oriented scheduler for a single autonomous vehicle. The vehicle starts at a known location at time 0. Ride requests arrive in input o...
Design an RBAC Relational Schema
Design a relational database schema for role-based access control (RBAC). Your design should model the following concepts: - User: a person or service...
Design a batch inference API
Design an Asynchronous (POST-and-Poll) Inference Service API Design an asynchronous inference service for serving model predictions. A client submits ...

Debug ML pipeline and build text parser
You are in a hands-on, hour-long ML-engineering working session (Scale AI, Machine Learning Engineer loop). You are given a small ML project — data lo...
Design a Product or Video Recommendation System
Design a recommendation system for a large consumer platform. The platform may recommend either products in an e-commerce feed or videos in a media fe...
Design Testing Without A/B Experiments
Suppose a product team wants to evaluate a new feature that is intended to improve user engagement and long-term retention, but a clean randomized A/B...
Design a Weighted Log Distributor
Design a high-throughput log distributor. Agents running on application and infrastructure hosts send packets to the distributor. Each packet may cont...
Design Personalized Product Feeds
Design an ML system for personalized product feeds in an e-commerce application. For each user request, the system should return a ranked feed of prod...
Design an Extensible Python File Parser
In Python, design a pluggable file parsing framework that can process multiple file formats such as CSV, JSON, and XML. Requirements: - Expose a commo...
Answer core probability and statistics questions
Answer the following interview-style probability/statistics questions. Provide formulas and short explanations. 1) Bayes’ rule: State Bayes’ rule. Giv...
Implement crawler, dedup, and persistent LRU
Implement crawler, dedup, and persistent LRU LeetCode 1236. Web Crawler: Crawl web pages starting from a given URL within the same hostname. LeetCode ...