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 bank system with transfers
Single-Process BankSystem: APIs, Data Model, Algorithms, and Edge Cases Context and Assumptions You are asked to design and implement a single-process...
Design locker allocation service
Design a Best-Fit Locker Assignment Component Context You are designing the locker-assignment component for a Locker OS used at physical locker banks ...
Explain database transactions and ACID
Database Transactions and ACID under Concurrency Prompt You are working with a relational database that supports transactions and multiple isolation l...
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:...
Implement a two-user communications handler
One-at-a-time Two-User Communications Handler Context Design and implement a communications handler that supports exactly one active conversation at a...
Design a basic bank system API
In-Memory Bank System: API, Data Model, Invariants, Semantics, and Edge Cases Goal Design and implement an in-memory bank system that supports account...
Design input validation and error handling
Design Task: API, Validation, and Error Handling for a Top-K Frequency Service Context Design a production-grade service that, given an array of eleme...
Build a Jenkins CI for graphics tests
Build a Jenkins CI for graphics tests Take‑Home: Design a Jenkins Pipeline for GPU Graphics Test Matrix Context You need to design a Jenkins-based CI/...
Design an online auction system
Design an online auction system System Design: Real-Time Online Auction Platform You are asked to design an online auction system that supports real-t...
Design a URL shortener
Design a URL shortening service. The system should support: - creating a short code for a long URL - redirecting users from the short code to the orig...
Design an IP blacklist API
Design an API and backend service for an IP firewall blacklist system. The service should allow security administrators or automated abuse-detection s...
Design user communication functions
Design user communication functions In-Memory Communication Manager Context Build a simple in-memory component that tracks which users can communicate...
Diagnose failures via SSH and large logs
Diagnose failures via SSH and large logs Troubleshooting Large Logs Over SSH and Designing Centralized Logging Context You are on-call for a productio...
Design real-time delivery tracking with async updates
Scenario Design a scalable, fault-tolerant backend system to track deliveries in real time. Context - Your company provides a tracking platform. - Thi...
Design scalable job scheduler and query dashboard
Design a scalable, fault-tolerant job scheduling system. The system should allow clients to schedule background jobs (for example, sending emails or r...
Design a Top-K search words service
Scenario Design a service that tracks user search queries and returns the Top-K most searched words/queries. Requirements Functional - API to record a...
Design e-commerce browse/search
Design e-commerce browse/search System Design: Category Browsing and Product Search for an E‑commerce Platform Context You are designing the category ...
Design game credit system with add/spend/refund APIs
System Design Prompt: Game Credit System with Add, Spend, and Refund APIs You are designing a backend service to manage virtual game credits for one o...
Design a course registration system
System Design: Course registration () Design an online course registration system for a university. Core user stories 1. Students can: - search/bro...
Design a live-stream comments system
System Design: Live-stream comments (YouTube Live-style) Design a system that supports real-time comments for live video streams. Core features - User...