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 …

Easy-level backend interview questions covering HTTP, REST APIs, databases, and server fundamentals. Q1: What is REST and what are its principles? Answer: graph TB A[REST<br/>Representational State Transfer] --> B[Stateless<br/>No session state] A --> C[Client-Server<br/>Separation] A --> D[Cacheable<br/>Responses] A …

Hard-level backend interview questions covering distributed systems, advanced architecture, and complex system design. Q1: Design a distributed caching system (like Redis Cluster). Answer: graph TB A[Distributed Cache] --> B[Consistent Hashing<br/>Data distribution] A --> C[Replication<br/>High availability] A --> …

Medium-level backend interview questions covering microservices, advanced databases, message queues, and performance optimization. Q1: Explain microservices architecture and its trade-offs. Answer: graph TB A[Microservices] --> B[Independent<br/>Services] A --> C[Decentralized<br/>Data] A --> …