Express.js Interview Questions
Check out 30 of the most common Express.js interview questions and take an AI-powered practice interview
What is Express.js and its architecture?
How do you create a basic server in Express.js?
What is middleware in Express.js?
How do you handle HTTP requests in Express.js?
What is routing in Express.js?
How do you handle request/response in Express.js?
What are controllers in Express.js?
How do you work with templates/views in Express.js?
What is RESTful API design in Express.js?
How do you handle static files in Express.js?
What are environment variables in Express.js?
How do you structure a Express.js application?
How do you implement authentication in Express.js?
What is database integration in Express.js?
How do you handle file uploads in Express.js?
What is caching strategy in Express.js?
How do you implement websockets in Express.js?
What is error handling middleware in Express.js?
How do you implement pagination in Express.js?
What is session management in Express.js?
How do you handle CORS in Express.js?
What is input validation in Express.js?
How do you implement rate limiting in Express.js?
What is logging and monitoring in Express.js?
How do you handle background jobs in Express.js?
How do you implement microservices with Express.js?
What are scaling strategies for Express.js?
How do you implement event-driven architecture in Express.js?
What is distributed tracing in Express.js?
How do you handle distributed transactions in Express.js?
Frequently Asked Questions
What is Express.js used for?
Express.js is widely used for creating server-side applications, APIs, and microservices. It's valued for its performance, reliability, and extensive ecosystem.
How long does it take to learn Express.js?
Learning Express.js basics typically takes 1-3 months of dedicated study. Achieving proficiency requires 6-12 months of practice and real-world projects. Mastery comes with years of experience and continuous learning.
What are the job prospects for Express.js developers?
Express.js developers are in high demand across industries. With strong Express.js skills, you can pursue roles in backend development, API development, DevOps, with competitive salaries ranging from ₹6-20 LPA.
What prerequisites are needed for learning Express.js?
Programming basics and understanding of web architecture are helpful prerequisites for learning Express.js.
Which companies use Express.js?
Major companies using Express.js include Google, Amazon, Microsoft, Meta, Netflix, and many more. Express.js is adopted across startups to enterprise organizations.
Introduction
Ready to ace your Express.js backend developer interview? Express.js powers server-side applications for countless companies worldwide.
Express.js is crucial for building scalable APIs, microservices, and server applications. This guide covers everything from basic concepts to advanced architectural patterns.
We'll explore commonly asked Express.js interview questions about request handling, database integration, authentication, performance optimization, and deployment strategies.
Master these questions to demonstrate your ability to build robust, secure, and efficient backend systems.
