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 company-wide monitoring system
You are asked to design a monitoring system used company-wide. Goals - Collect and query telemetry for many services/hosts - Support alerting and dash...
Explain multithreading and locks
Multithreading, Locks, Concurrency Hazards, and a Bounded Queue Design Context: Technical screen for a software engineering role. You are asked to dem...
Explain shader compilers and graphics APIs
Shader Compilation Pipeline, API Comparison, and Minimal Compiler Design Context Assume you are targeting modern discrete GPUs and common programmable...
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...
Schedule and execute future payments
System Design: Scheduled Payments Execution Context You are building a balance-transfer service (e.g., an internal wallet). Users can schedule a payme...
Design a scalable calendar system
System Design: Multi-Tenant Calendar at Massive Scale You are designing a multi-tenant calendar platform used by hundreds of millions of users across ...
Implement FastAPI CRUD endpoints from skeletons
Implement Update and Delete Endpoints in a FastAPI CRUD Service Context You are given a FastAPI project that already has working Create and Read endpo...
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...
Design a keyboard and mouse input system
Question Design an input processing system that captures keyboard and mouse events and can reliably reconstruct what the user typed (answering "what d...
Design a basic task management system
Design a Simple Task Management Service Requirements Design a simple task management system that supports: 1. Add a new task with a unique ID and desc...
Design donation database and failure handling
System Design: Donations Platform with One-Time and Recurring Payments Context Design a backend for a donations platform that supports campaigns, one-...
Design speaking scenarios and auth/profile API
System Design Task: Speaking-Scenario Practice Feature + MVP Auth API Context: You are designing a new speaking-scenario practice capability for a lan...
Design line-preserving file chunker pipeline
System Design: Pack Text Lines into Exact 100 MB Output Files Design a data pipeline that reads many text files of varying sizes and emits output file...
Design a Multi-Channel Message Queue
Design a Message Queue with Multi-Channel Messages and Channel-Based Subscriptions Context You are asked to design a message-queue data structure wher...
Design real-time ad impression and spend tracking
Scenario You are building a backend that helps an ad server decide whether a candidate ad can be delivered (e.g., not over budget / within pacing). Th...
Design short URL service with click counting
Design a production-ready service that: 1. Creates a short URL for a given long URL (URL shortening). 2. Redirects when a user visits the short URL. 3...
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 metrics platform without alerting
Design a metrics platform (like a simplified Prometheus/Datadog metrics product) that supports collecting, storing, querying, and visualizing metrics....
Design pickup point planning for ride-hailing
You are given a ride-hailing scenario interview question: > A passenger requests a ride from somewhere in a city. The driver is currently at a known G...
Explain Your System Architecture
System Design Interview: End-to-End Architecture Deep Dive Task Explain the end-to-end architecture of a production system you built or can credibly d...