Software Engineer System Design Interview Questions
Practice 944 real System Design interview questions for Software Engineer roles. From companies including Meta, OpenAI, Amazon, Anthropic, Google.
"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 concurrent web crawler
Web Crawler System Design (Onsite) Problem Design and implement a concurrent web crawler that: - Starts from a given URL. - Uses a provided interface ...
Design a Google News-like aggregator
System Design: News Aggregation Platform (Google News–like) Context Design a multi-region news aggregation platform that ingests content from many pub...
Identify and handle race conditions
Concurrency in an In-Memory Key-Value Store and Hit Counter Context and Assumptions Assume you are implementing an in-memory key-value store and a hit...
Design an IAM system for services and users
System Design Prompt Design an Identity and Access Management (IAM) system for an organization/platform. The system must support: - Human users and se...
Design delivery cost calculation system
Design: Delivery Cost System (Object-Oriented) Goal Build a class-based system to track delivery work by drivers, compute costs, manage payments, and ...
Design market price change notifications
Design a system that notifies users when market prices change for the symbols they track. Context and requirements: - Users maintain a watchlist of sy...
Design a news feed aggregator
System Design Take‑Home: Large-Scale News Aggregator and Personalized Feed Context Design a production-ready news aggregation and personalized feed pl...
Design a delivery cost dashboard with payments
Object-Oriented Delivery Cost Dashboard Service Goal Design and implement an object-oriented service to track delivery costs across multiple drivers, ...
Design the manual review workflow
System Design: Human-in-the-Loop Review Subsystem Context You are designing a human-in-the-loop (HITL) review subsystem for a large-scale safety platf...
Design a file sync and sharing service
Scenario Design a cloud file storage, sync, and sharing service similar to a consumer/team drive product. Core requirements - Upload/download files fr...
Design street-view image ingestion and storage system
Prompt Design a system to ingest, store, and process street-level images for a "Street View"-like product. Scenario - A fleet of taxis is equipped wit...
Design lexicographic range query word store
Design a storage/data structure for a set of strings that supports lexicographic range queries. You are given a collection of words (strings), stored ...
Design a tamper-evident video chain-of-custody audit system
System Design: Tamper-Evident Audit Logging for Video Evidence Chain of Custody Design a scalable, tamper-evident audit logging system for video evide...
Design auth, session security, and top-N users
Web App Design: Authentication, Security, and Top-N Active Users Context: Build a browser-based web application where a user signs in and the page dis...
Design API for split-stay combinations
Design an HTTP API for Two‑Listing Split‑Stay Search Context You are building a search service for split stays: when a guest's date range cannot be co...
Design a 911 emergency calling service
System Design Prompt Design a 911 emergency calling service (or emergency call routing platform) that allows users to place emergency calls from mobil...
Design a chat messaging system
Design a chat system similar to WhatsApp/Messenger. Requirements: - 1:1 and group chats. - Send/receive messages in real time when online; store-and-f...
Design a YouTube/Netflix video platform
Design a video platform similar to YouTube/Netflix. Requirements: - Upload videos (for YouTube-like) and/or ingest catalog (for Netflix-like). - Trans...
Design an online auction system
Design an online auction system (eBay-style). Requirements: - Users create auctions with start/end time and starting price. - Users place bids; system...
Design game matchmaking and waiting queue
Design a scalable game matchmaking and waiting-queue system Context You are designing the matchmaking system for a large real-time multiplayer game. P...