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, …

Comprehensive backend interview questions covering APIs, databases, microservices, distributed systems, and performance optimization. Overview Backend development encompasses: API Design: REST, GraphQL, gRPC Databases: SQL, NoSQL, transactions, optimization Microservices: Architecture, communication, scaling …

Hard-level backend interview questions covering distributed systems, advanced architecture, and complex system design. Q1: Design a distributed caching system (like Redis Cluster). Answer: Consistent Hashing Implementation 1package main 2 3import ( 4 "fmt" 5 "hash/fnv" 6 "sort" 7 "sync" …

Paxos consensus algorithm interview questions covering the classic distributed consensus protocol. Q1: How does Paxos consensus work? Answer: Paxos is a consensus algorithm for distributed systems that ensures agreement among nodes even with failures. Sequence Diagram: Overall Flow Diagram: Individual Node Decision …

Comprehensive protocol design and distributed systems interview questions covering networking, communication protocols, and distributed consensus. Network Protocols Interview questions covering fundamental and advanced networking concepts: Easy: OSI model, TCP vs UDP, DNS, HTTP, REST APIs, WebSocket, authentication …

Hard-level software architecture interview questions covering advanced distributed systems, consensus, and complex patterns. Q1: Explain distributed consensus algorithms (Raft, Paxos). Answer: Problem: How do multiple nodes agree on a value in presence of failures? Raft Algorithm Roles: Leader: Handles all client …

Medium-level software architecture interview questions covering distributed systems, event-driven architecture, and advanced patterns. Q1: Explain Event-Driven Architecture and its benefits. Answer: Definition: Architecture where components communicate through events (state changes) rather than direct calls. Core …

Medium-level protocol and design interview questions covering advanced networking and distributed systems concepts. Q1: Explain HTTP/2 improvements over HTTP/1.1. Answer: HTTP/1.1 vs HTTP/2 Multiplexing Benefits: No head-of-line blocking Reduced latency Better bandwidth utilization Fewer connections Q2: Explain gRPC …

Hard-level scalability interview questions covering extreme scale, global distribution, and advanced optimization. Q1: Design a globally distributed database with strong consistency. Answer: Challenge: CAP theorem - can't have all three (Consistency, Availability, Partition tolerance). Two-Phase Commit (2PC): …

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 …