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 Perishable-Goods Inventory and Location Tracking System
Design a Perishable-Goods Inventory and Location Tracking System Design a backend service that tracks perishable items across a retail network and rep...
Improve classifier with noisy multi-annotator labels
Problem You are given a text dataset for a binary classification task (label in $\{0,1\\}$). Each example has been labeled by multiple human annotator...
Solve probability and game-theory puzzles
You are interviewing for a quant trading internship. Work through the following probability and game-theory puzzles. There is no need to answer instan...
Fix Thread-Safe Trigger Synchronization
Implement a thread-safe one-shot trigger (a one-time event signal) in Python, then critique a buggy fragment a candidate proposed for it. The trigger ...
Design an LLM-Based Coding Assistant
Design an LLM-Based Coding Assistant You are asked, in a research-design round, to design the model and end-to-end system behind a large-language-mode...
Define Churn and Design Onboarding Experiment
You are the product data scientist for a consumer app. The team is evaluating a redesigned onboarding flow, and some variants of the new flow may incl...
Design a Scalable Job Scheduler
Design an internal job scheduling platform for a large company. The platform lets internal services and engineers submit jobs that run at a specified ...
Design a Hierarchical File System
Design a hierarchical file system service from scratch, without relying on an existing blob store or distributed object storage (you must store the ra...
Design an Uber Eats Cart Service
Design the shopping cart service for a food-delivery platform similar to Uber Eats. The service lets a customer add, update, and remove menu items fro...
Deterministic Task Execution Order
Deterministic Task Execution Order A build system runs n tasks labeled 0, 1, ..., n - 1. Some tasks depend on others: a dependency [a, b] means task a...
Design a Cloud DevBox Platform
Design a cloud DevBox platform: a service that gives developers disposable or persistent remote development machines, accessible through a browser, SS...
Answer Culture and Project Questions
Prepare answers for Anthropic's hiring-manager (HM) and culture interviews for a Software Engineer role. These are the two non-technical rounds in a f...
Design Android MVVM API Architecture
Design the client-side architecture for a single Android screen that loads data from a remote HTTP API and renders it in a Jetpack Compose UI, using a...
Compute Theme Similarity
Implement a small set of Python functions to detect likely pirated Shopify themes by comparing their extracted feature sets using the Jaccard similari...
Design a Neighborhood Newsfeed System
Design a neighborhood-based social newsfeed system similar to Nextdoor. Users belong to a verified physical neighborhood and see a personalized home f...
Minimal Unique Word Abbreviations
Minimal Unique Word Abbreviations You are given an array words of n distinct strings. Produce a minimal abbreviation for every word according to the r...
Convert a Roman Numeral to an Integer
Convert a Roman Numeral to an Integer Roman numerals are written with seven symbols, each with a fixed integer value: | Symbol | Value | |--------|---...
Design a Distributed Crossword Solver
Design a scalable, distributed service that solves crossword-style fill-in puzzles. A request contains a rectangular grid with blocked cells, empty ce...
Detect and Break a Cycle in a Singly Linked List
You are given the head of a singly linked list. The list may or may not contain a cycle: somewhere in the list, one node's next pointer may point back...
Implement a Searchable Logger Pipeline
Design and implement an in-memory logging system. The system should support: 1. Adding handlers - A handler transforms a log message before it is s...