Software Engineer System Design Interview Questions
Practice 904 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 real-time chat system
System Design: Real-Time Chat (1:1 and Groups) Context Design a mobile-first, globally available real-time chat system that supports both 1:1 and grou...
Propose and Validate a Mobile App Improvement
Assume you are working on a consumer mobile app. Propose one product improvement that could improve user engagement, retention, or conversion. Your an...
Design an Event Booking System
Design a high-level event booking system for concerts, movies, or sports events. The system should allow organizers to create events and publish seat ...
Design a pickup-area driver queue
Design an internal service for a ride-hailing company that maintains a driver queue for each pickup area, such as an airport pickup zone or staging lo...
Design a URL Shortening Service
Design a production-ready URL shortening service. The system should: - Accept a long URL and return a short, unique alias. - Redirect a short URL to t...
Design concurrency-safe shared payment account API
Prevent Double-Spending When Two Users Pay Simultaneously from the Same Account Context You are designing a payments service where multiple clients ma...
Model booking auxiliary comments with admin updates
Design an object-oriented model (and high-level system design) for a booking system feature that stores auxiliary comments on a reservation. Core requ...
Diagnose why a scaled system became slow
You are on-call for a production service that recently scaled up (more instances, more users/traffic). After the scale-up, users report the system is ...
Design a video streaming platform like Netflix/YouTube
System Design Design a large-scale video streaming platform similar to Netflix/YouTube. Core user stories 1. Upload (creator) / ingest (studio) videos...
Design a multi-tenant course purchase and delivery system
Design a multi-tenant online course purchasing and delivery system with the following requirements. Domain model / requirements - There are multiple C...
Implement held transfers with accept/cancel
Question Design and implement a two-phase ("pull-style") money-transfer system in which funds are first held on the source account and then either cap...
Implement account CRUD and transfer
Design and Implement Money Movement APIs Context You are building a small money-movement service for a single currency. The system must support creati...
Design web crawler for 1000 devices
Distributed Web Crawler: Design for 1,000 Devices Context Design a production-ready web crawler that starts from a single seed URL and scales crawling...
Design analytical tracking database
Design an Analytical Database for User Actions Context You are building an analytics data store to track user behavior and commerce events so that pro...
Design a search autocomplete system
Design a Search Autocomplete System Design a planet-scale search autocomplete (type-ahead) service. As a user types into a search box, the service ret...
Explain and diagram your past system architecture
System Design Walkthrough: Architecture You Have Built/Owned Provide a whiteboard-style walkthrough of a production system you have personally built o...
Explain using MapReduce
Using the MapReduce Programming Model to Process Large Datasets You are asked to explain how the MapReduce programming model processes large-scale bat...
Design cloud storage system
In-Memory Cloud Storage: Design and Implement You are asked to design and implement an in-memory cloud storage system that maintains a mapping from fi...
Compare RDBMS and NoSQL trade-offs
RDBMS vs. NoSQL: Compare and Recommend Context You are designing a production backend service and must choose between a relational database (RDBMS) an...
Design a Netflix-like video platform
Scenario Design a Netflix-like platform that supports: - Search for videos (by title, tags, people, etc.) - Stream videos to web/mobile/TV clients - U...