Comprehensive architecture, system design, and scalability interview questions covering distributed systems, design patterns, and large-scale system architecture. Architecture Design Interview questions covering software architecture patterns and design principles: Easy: Monolithic vs. Microservices, REST vs. GraphQL, …

Easy-level system design interview questions covering fundamental system design concepts and simple applications. Q1: Design a URL shortener (like bit.ly). Answer: Requirements Shorten long URLs to short codes Redirect short URLs to original Track click statistics High availability High-Level Design Database Schema URL …

Hard-level system design interview questions covering globally distributed, highly scalable systems. Q1: Design WhatsApp/Telegram (Global Messaging). Answer: Requirements 2B users globally Real-time messaging End-to-end encryption Group chats (256 members) Media sharing 99.99% uptime <100ms latency Global …

Medium-level system design interview questions covering complex distributed systems. Q1: Design Twitter/X. Answer: Requirements Post tweets (280 chars) Follow/unfollow users Timeline (home feed) Search tweets Trending topics 500M users, 100M DAU Architecture Tweet Flow Timeline Generation Fanout Strategies: Database …

Requirement diagrams visualize system requirements and their relationships. Perfect for documenting functional requirements, tracing requirements, and showing requirement dependencies. Use Case Use requirement diagrams when you need to: Document system requirements Show requirement relationships Trace requirements to …

Block diagrams show system components as blocks with connections. Perfect for visualizing system architecture, data flow, and component relationships. Use Case Use block diagrams when you need to: Show system architecture Visualize component relationships Document data flow Design system components Communicate system …

The C4 model provides a hierarchical way to visualize software architecture at different levels of abstraction: Context, Containers, Components, and Code. Perfect for documenting system architecture. Use Case Use architecture diagrams when you need to: Document system architecture Show system boundaries and …