Easy-level backend interview questions covering HTTP, REST APIs, databases, and server fundamentals. Q1: What is REST and what are its principles? Answer: REST Principles 1. Stateless: Each request contains all information needed 2. Client-Server: Separation of concerns 3. Cacheable: Responses can be cached 4. Uniform …

Entity Relationship Diagrams (ERD) visualize database schemas, showing entities, their attributes, and relationships. Perfect for database design and documentation. Use Case Use ER diagrams when you need to: Design database schemas Document database structure Show relationships between entities Visualize data models …