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 an online chess game with undo and leaderboard
This question evaluates proficiency in real-time system design, state management, and concurrency control for multiplayer games, including consistency...
Design local sports team recommendation system
Design a recommendation system that suggests local sports teams to users. High-level requirements: - Recommend sports teams that are relevant to a use...
Design a listing connectivity ingestion service
Scenario You are designing a Connectivity Service that allows external service providers (partners) to create or update listings in your company’s pla...
Design ride-hailing and price alert systems
During a system design interview, you are asked two related but separate design questions. Treat each as an independent end-to-end design; you will be...
Design an ad click tracking system
This question evaluates a candidate's ability to architect a high-throughput, reliable ad event tracking system, including event modeling, streaming a...
Design a Go music player with playlists
Design and Implement an Object-Oriented Music Player in Go You are asked to design and implement a small, object-oriented music management and playbac...
Design an async donation payment platform
System Design: Online Donation Platform for a 3-Day Campaign Context You are designing a donation platform for a time-bounded, high-traffic, three-day...
Design a content processing service
System Design: High-Throughput Content Processing Service Context Design a content processing and moderation service for a large-scale media app. Cont...
Prioritize rooms for allocation
System Design: Room Allocation and Ranking Service Context and assumptions: - The client sends a meeting request with: (a) time window or fixed start/...
Design MapReduce for schedules
Design a scalable job to compute rolling 15-minute meeting concurrency and room utilization You are given a massive log of meeting events with fields:...
Design a ticketing purchase system
System Design: High-Concurrency Ticket Purchasing With Seat Maps You are asked to design an end-to-end ticketing system for large on-sale events (e.g....
Explain cloud computing fundamentals
Explain cloud computing fundamentals Design a Cloud-Native, Horizontally Scalable, Fault-Tolerant Web Application for Millions of Users Context You ar...
Implement held transfers with accept/cancel
Implement held transfers with accept/cancel Design and implement a two-phase ("pull-style") money-transfer system in which funds are first held on the...
Explain multithreading and locks
Explain multithreading and locks Multithreading, Locks, Concurrency Hazards, and a Bounded Queue Design Context: Technical screen for a software engin...
Design cloud & k8s architecture
Design cloud & k8s architecture Technical Screen: Kubernetes, Cloud Services, and Secure CI/CD Context You are designing and operating services on Kub...
Design user communication manager APIs
Design user communication manager APIs In-Memory Communication Manager (Bidirectional Sessions) Goal Design a lightweight, in-memory manager that trac...
Architect serving and storage for recommender
Architect serving and storage for recommender System Design: Recommendation Service (Serving + Data Infrastructure) Context Design a production-ready ...
Design MapReduce for schedule aggregation
Design MapReduce for schedule aggregation MapReduce Design: Common Availability From Busy Intervals Context You are given large-scale calendar data: e...
Ensure thread-safe updates to org hierarchy
Ensure thread-safe updates to org hierarchy Thread-safe Organization Hierarchy: API, Concurrency, and Consistency Context You are building an in-memor...
Explain using MapReduce
Explain using MapReduce Using the MapReduce Programming Model to Process Large Datasets You are asked to explain how the MapReduce programming model p...