Software Engineer System Design Interview Questions
Practice 1,082 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 Scalable Likes System
This question evaluates system design and distributed-systems skills, specifically scalability, consistency, API and data schema design, indexing stra...
Design Real-Time Trending Likes
This question evaluates skills in designing scalable, low-latency real-time analytics systems, covering stream processing, time-windowed aggregations,...
Design a car rental booking system
System Design: Car Rental Booking System Design an online car rental system (like Hertz or Avis) that lets users search for available rental cars, get...
Design a compliant multi-tenant analytics platform
This question evaluates system design and security competencies, including multi-tenant architecture, complex authorization and attribute-based access...
Design expense rules engine and return type
Design a Rules Engine for Corporate Card Expenses Context We offer a corporate credit card that employees use for business expenses. Managers set poli...
Design a satellite propagation simulator
Design a satellite propagation simulator Object-Oriented SatelliteNetwork: Message Propagation Simulator Design and implement an object-oriented Satel...
Design Sensor Data Processing With AI-Assisted Implementation
Design a system that ingests sensor data, processes it, stores it, and supports queries over the processed results. In the coding round, the candidate...
Design a Twitter-like service
Design a simplified Twitter-like system that supports: - Users can post short messages (tweets). - Users can follow/unfollow other users. - Home timel...
Build AI-Assisted Full-Stack Transactions App
Build a minimal full-stack app for monetary transactions This is the "AI coding" round: using an AI coding tool of your choice (e.g., Cursor), build a...
Design Emergency Notification System
Design a disaster or emergency notification system for an organization such as a city government, university, or large company. The system should allo...
Design a Visa-like payment processing system
This question evaluates a candidate's ability to design a secure, low-latency card payment processing network, testing knowledge of distributed system...
Design a booking system
This question evaluates system design skills including distributed systems, data modeling, concurrency control, consistency models, API design, scalab...
Design a Payment Fraud Detection Service
Design a real-time fraud detection service for a payment platform. When a user submits a payment attempt, the platform calls your service before autho...
Design a Hotel Booking System
This question evaluates system design and backend architecture competencies, including data modeling, transactional integrity, concurrency control, sc...
Design cart and pricing engine classes
Design the core classes and interfaces for a cart & pricing engine for a food delivery marketplace (e.g., Uber Eats). This is an object-oriented / low...
Scale a Distributed Randomized Multiset
After designing the randomized multiset on a single machine, explain how you would scale it across multiple servers. The distributed system should sup...
Design a rare-book lending and returns system
Design a rare-book lending and returns system System Design: Rare Books Circulation Across Multiple Branches Context Design a system to manage borrowi...
Handle traffic spikes and estimate server capacity
Scenario You are designing and operating a backend service that receives API requests from clients. Recently, the service becomes slow or times out wh...
Design a distributed job scheduler service
Design a distributed job scheduling system — a cloud-hosted, microservice-based service that lets clients register tasks to run on a schedule and runs...
Design an online ticket marketplace
Design a Ticketmaster-like system for discovering events and buying tickets. Your design should cover: - Functional requirements (e.g., browse/search ...