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 real-time chat system with hot groups
This question evaluates system design and real-time distributed systems skills, including designing scalable chat architectures that support 1:1 and g...
Design a Real-Time Auction Platform
Design a real-time online auction platform. Users can browse an auction, submit bids, and see the current highest bid and bid history update live. Tra...
Discuss productionizing event-timeout detector
Discuss productionizing event-timeout detector System Design: Production-Ready Event-Timeout Detector You are designing a production service that dete...
Design an in-memory database
Design an in-memory database System Design: In-Memory Database Engine (Single-Node Core, Scale-Out Aware) Context Design the core of an in-memory, sin...
Design Robust Large-Input Processing
The string-reduction algorithm above is now part of a backend service. Each job reads a text object from S3-compatible storage, applies the transforma...
Design a multi-level parking system
Design a multi-level parking system System Design: Multi‑Level Parking System Context Design the backend for a multi‑level parking facility. The syste...
Design real-time driver heatmap system
System Design: Real-Time Driver Heatmap and Top-K Hottest Cells Context You are building a real-time driver heatmap for a ride-hailing platform that v...
Design a Concurrent Car Reservation Service
Design a Concurrent Car Reservation Service Prompt Design a car reservation service. A customer searches for an available car for a location and time ...
Design a 911 emergency calling service
System Design Prompt Design a 911 emergency calling service (or emergency call routing platform) that allows users to place emergency calls from mobil...
Describe a Python design-and-coding approach in Colab
Python Coding-and-Design Exercise in Google Colab You are given an open-ended coding-and-design exercise to complete in Python, and the interviewer re...
Implement a minimal local HTTP server
Build a Minimal Local HTTP/1.1 Server (No Frameworks) Context You are asked to implement a minimal HTTP/1.1 server from scratch using only the standar...
Design production-ready dedup service
System Design: Production-Ready File Deduplication Service Context Design a multi-tenant cloud service that stores files and achieves space savings vi...
Design real-time game matchmaking service
Design a Real-Time Game Matchmaking Service Context You are designing the matchmaking subsystem for an online multiplayer game that supports multiple ...
Design distributed log storage service
Design a Distributed Append-Only Log Storage System You are asked to design the storage layer of a distributed, partitioned, replicated append-only lo...
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 multi-tab browser history and trade-offs
Design: Multi-Tab Browser History Context: Extend a single-tab browser-history component into a multi-tab manager that supports opening/closing tabs, ...
Design a concurrent web crawler
Web Crawler System Design (Onsite) Problem Design and implement a concurrent web crawler that: - Starts from a given URL. - Uses a provided interface ...
Design a scalable, reliable system
System Design: Global Photo/Video File Storage and Sharing ("CloudDrive") Context Design a scalable, highly reliable consumer service where users uplo...
Design trip booking REST API and schema
Design a RESTful API for a guest to book a trip. Include: - Core endpoints (search availability, create booking, view/cancel booking, payment/confirma...
Design a scalable coffee ordering notification system
This question evaluates a candidate's ability to design scalable, real-time distributed systems with emphasis on order lifecycle management, reliable ...