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."
Shift Non-Zero Elements Left In Place
Shift Non-Zero Elements Left In Place You are given an integer array nums. Rearrange the array in place so that every element equal to 0 is moved to t...
Design delayed job scheduler (LLD)
Design a Delayed Job Scheduler (Low-Level Design) Design a service that schedules a job to execute X seconds in the future with second-level accuracy....
Compare arrays, linked lists, hash tables, trees
Answer the following computer-science fundamentals questions: 1) What are the time complexities (Big-O) of common sorting algorithms (e.g., bubble sor...
Merge overlapping weekly time intervals
You are given a list of time intervals representing meetings. Each interval is a pair of strings in the format: - "<Day> <H>:<MM>" (24-hour time) - <D...
Answer Amazon Behavioral Questions
Question You are in the behavioral portion of an Amazon final-round interview (Software Development Engineer internship). Prepare strong, structured r...
When should products use AI?
A product-oriented interview asks you to discuss AI adoption in software products. Explain how you would decide whether a feature should use AI or a t...
Implement a Single-Node Priority Pub/Sub
Implement a simplified in-memory publish-subscribe system that runs on a single machine. The system should support users subscribing to topics with a ...
Design a banking ledger for deposits/withdrawals
Banking/OO Design: Account Ledger Design a minimal in-memory or persistent component for a bank account system that supports: - deposit(account_id, am...
Decompress encoded string with nested repeats
Given an encoded string, decompress it into its expanded form. Encoding rules: - Parentheses (...) denote a group. - A repetition count is written in ...
Find minimum reversals to orient edges away from root
You are given a connected graph with n nodes labeled 0..n-1 and n-1 directed edges. If you ignore edge directions, the edges form a tree. Each directe...
Answer suffix maximum-frequency queries
You are given: - An integer array nums of length n. - An integer array queries of length m, where each queries[k] is an index i (0-based) into nums. F...
Describe your best team and your role
Question This is a two-part behavioral question. Answer both parts with concrete, specific examples (use STAR where relevant), and connect what you va...
Design a recursive distributed file crawler
Design a distributed service that crawls a large file system starting from a root path. A client should be able to call an API to start a crawl job, a...
Design a digital game shop backend
Design the backend for a simple digital game shop where users can buy virtual items (e.g., games, in‑game currency, skins) using credits in their acco...
Solve Four Online Assessment Problems
Complete the following four independent coding tasks. For each task, write a function that returns the requested result. 1. Find the best value index ...
Design experiments and diagnose metric changes
You are a Product/Data Scientist at a food-delivery marketplace (customers, dashers/couriers, merchants). Answer the following product analytics & exp...
Implement Dependency-Aware To-Do List
Implement an in-memory to-do list in Python for managing tasks and task dependencies. You are given three core types to design: - TaskStatus: an enum ...
Implement an Arithmetic Expression Evaluator
Implement an arithmetic expression evaluator. Part 1: Given a string expression containing non-negative integers, spaces, and the operators '+', '-', ...
Design a scalable notification system
Problem Design a notification system for a company at Airbnb-like scale that can send notifications to different user types (e.g., customers/guests, h...
Design evaluation when A/B test is impossible
Scenario You want to evaluate whether a product or model change (e.g., a new ranking strategy, pricing rule, or UI change) improves business outcomes....