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 distributed job scheduler
Question Design a distributed job scheduler that can run background jobs at specific times or on recurring schedules (similar to cron but scalable and...
Design a Cloud File Storage Service
This question evaluates a candidate's ability to design scalable, secure distributed file storage systems, covering competencies in file and folder hi...
Design a backend for an online checkers game
This question evaluates system design and backend engineering competencies, including authoritative game-state modeling, turn-based concurrency contro...
Design a Figma-like collaborative editor
System Design: Collaborative design editor (Figma/Google Docs style) Design the backend (and key client interactions) for a real-time collaborative de...
Design favorites and social game recommendations
This question evaluates a candidate's ability to design scalable backend systems for social features, assessing competencies in data modeling, event-d...
Design a URL shortening service
This question evaluates systems design skills including scalable architecture, data modeling, low-latency routing, availability, and operational conce...
Design Spring Boot for high availability and background work
This question evaluates a candidate's competency in designing highly available, load-balanced Spring Boot applications and architecting resilient back...
Design an in-memory hotel booking system
Design a hotel booking system that supports reservations without using any database. You may only use in-memory data structures. Requirements Define A...
Design a desktop AI chat frontend
Design a Frontend Architecture for a Cross-Platform Desktop Conversational AI App Context You are designing the frontend architecture for a cross-plat...
Compare streaming frameworks and delivery semantics
Name popular streaming/data-processing frameworks (e.g., Kafka-based stacks, Flink, Spark Streaming, etc.). Explain at-most-once, at-least-once, and e...
Design a digital game shop backend
This question evaluates system design skills including transactional data modeling, API design, service decomposition, and reliability concerns for mo...
Design a malicious-URL checking service using an isMalicious API
This question evaluates system design competencies such as scalable API design, caching and cache invalidation strategies, rate limiting and backpress...
Design restaurant shift scheduling
This question evaluates skills in data modeling, backend system architecture, API design, scalability engineering, and consistency management for a mu...
Design a high-throughput distributed rate limiter
Question Design a high-throughput, distributed rate-limiting service that runs across multiple regions with low latency and burst tolerance. The servi...
Design real-time stock price viewer
System Design: Real‑Time Stock Prices Viewer (No History) You are designing a real‑time system that lets clients view current stock prices only. No hi...
Design a Real-Time Logging System
Design a logging/telemetry system for a large application platform. Requirements: - Many services send log or metric events to the system - Event subm...
Design a Global Marketing Email Platform
This question evaluates a candidate's ability to design a scalable, reliable distributed system for global marketing email delivery, encompassing time...
Design highly available blob storage service
Design a large-scale, highly available blob storage service similar to Amazon S3. The service should allow clients to store, retrieve, and delete arbi...
Design an A/B Testing Platform
This question evaluates a candidate's ability to design scalable, reliable experimentation and analytics platforms, testing competencies in distribute...
Design an ACL authorization checking service
This question evaluates system design and security architecture skills, focusing on centralized authorization/ACL models, API and data modeling, cachi...