Backend Development Interview Questions
Server-side programming, APIs, databases, authentication, security, microservices, and server architecture
5 interview questions in this category to help you prepare for your next interview.
What is Node.js and how does it handle concurrency with its event-driven architecture?
Understanding Node.js runtime, event loop, non-blocking I/O, and how it achieves high concurrency with single-threaded architecture.
Explain authentication vs authorization. How would you implement JWT-based authentication?
Understanding the difference between authentication and authorization, and implementing secure JWT-based authentication systems.
Explain database indexing and how it improves query performance.
Understanding database indexes, types of indexes, how they work, and their impact on query optimization and performance.
What is the difference between SQL and NoSQL databases? When would you use each?
Understanding relational vs non-relational databases, their strengths, weaknesses, and appropriate use cases.
Explain RESTful API design principles and best practices.
Understanding REST architecture, HTTP methods, status codes, resource naming, and API design best practices.