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 Checkers Game Simulator
Design and partially implement an object-oriented simulator for a two-player checkers-like board game. Requirements: - The game is played on an 8 x 8 ...
Find longest subsequence of x that is a substring of y
Given two strings x and y, compute the maximum length of a string s such that: - s is a subsequence of x (can delete zero or more characters from x wi...
Design a Trade Ledger Class
Design a class that records daily stock trading activity and returns all recorded trades in sorted order. Requirements: - Implement a method to regist...
Plan and lead a large recommendation project
You are given a recommendation design problem, but the interviewer focuses on leadership and execution rather than detailed modeling. Explain how you ...
Design a Column-Queryable KV Database
Design a distributed key-value database for sparse records, where each row has a primary key and a flexible set of named columns. The system must supp...
Evaluate marketplace interventions
You are a data scientist at a two-sided delivery marketplace. Answer the following product analytics and experimentation cases. For each case, define ...
Design Telehealth Consultation Queue
Design a web-based queuing application for a health-insurance company that offers free 24/7 telehealth access to its members through a website and mob...
Write SQL to analyze CA residency history
You have two SQL tables. Table 1: user_info (current snapshot) - id (user id) - shard (partition column) - name - country - state - created_date Table...
Design an in-memory cloud storage system
Design an in-memory cloud storage system In-Memory Cloud Storage: Files, Discovery, Users, and Compression Context: Design an in-memory storage librar...
Design a Conversational AI Assistant
Design a large-scale conversational AI product similar to ChatGPT. Users should be able to: - start a new conversation, - send prompts, - receive stre...
Design a local activity counter service
System Design: Near-Real-Time Activity Counting Service Context Build a service that ingests high-throughput client events and provides near-real-time...
Describe a challenging project and how you succeeded
Behavioral prompts Answer the following using a structured format (e.g., STAR: Situation, Task, Action, Result), focusing on your contributions, trade...
Find Valid IP Addresses in Files
You are given an absolute or relative path to a directory on the local file system. Write a program that recursively traverses every subdirectory unde...
Generate Data Labeling Schedules
A data labeling platform manages tasks, AI models, and human annotators. Each entity has a 1-indexed string ID. You are given four integers: totalTask...
Write SQL window functions for D7 retention
Assume you have the following tables (timestamps are in UTC). 1) game_sessions - user_id (STRING) - session_start_ts (TIMESTAMP) - country (STRING) Ea...
Describe leadership under changing priorities
Prepare structured answers for these behavioral questions: - Tell me about a time you went above and beyond expectations. - Tell me about a time you f...
Delete a Character From Cover
You are given a source string book and a cipher represented by a list of inclusive index intervals cover = [(l1, r1), ..., (lm, rm)]. The decoded ciph...
Design a distributed tree node counter
Design a distributed tree node counter Distributed Tree Node Count with Two Messages You are given an N-ary tree of machines (one process per node). E...
Describe a proud project and conflict
In a behavioral interview, be prepared to discuss your previous work experience, one project you are especially proud of, and a time you had a conflic...
Explain projects and handle AI-safety conflicts
Behavioral / Hiring Manager round 1. Walk through 1–2 key projects from your resume. - What was the goal and why did it matter? - What was your ...