Question 1

What is system design?

Accepted Answer

System design is the process of defining the architecture, components, modules, interfaces, and data flow of a software system to satisfy specified requirements at scale. It covers high-level design decisions like choosing databases, caching layers, message queues, load balancers, and CDNs, plus how those components interact to handle real-world traffic, latency, and reliability requirements.

Question 2

How do I learn system design for interviews?

Accepted Answer

The fastest way to learn system design is by practicing real problems with feedback. SystemCity offers 122+ curated problems — from URL shorteners and chat apps to globally distributed databases — each with reference architectures, scale estimates, API design hints, and instant AI evaluation from GPT, Gemini, and Claude. Start with Easy problems, build intuition for components, then tackle Hard and Advanced scenarios.

Question 3

Is SystemCity free to use?

Accepted Answer

Yes. SystemCity has a free tier that includes access to many curated system design problems, the interactive design canvas with 70+ components, and limited AI evaluations. Premium unlocks unlimited evaluations, advanced problems, and unlimited saved architectures.

Question 4

What AI models evaluate my system design?

Accepted Answer

SystemCity evaluates your architectures using OpenAI GPT, Google Gemini, and Anthropic Claude. Each evaluation returns a numeric score plus specific strengths, weaknesses, and actionable suggestions tied to your design choices.

Question 5

What topics does SystemCity cover?

Accepted Answer

SystemCity covers core distributed systems concepts: load balancing, caching strategies, database sharding and replication, message queues, CDNs, rate limiting, consistent hashing, eventual consistency, CAP theorem, microservices, API design, real-time systems, search infrastructure, and more — all applied to concrete problems like designing Twitter, Uber, Netflix, Dropbox, WhatsApp, and Google Maps.

Question 6

Do I get a real architecture diagram canvas?

Accepted Answer

Yes. The SystemCity design canvas lets you drag and drop 70+ real system components — load balancers, databases, caches, queues, CDNs, edge servers, services — connect them with typed protocols, and get live architecture lint checks for issues like single points of failure, missing caches, and unbounded queues.

Master System Design

Master System Design