Top 50 Node JS Interview Questions and Answer BackEnd Interview NodeJS Interview

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Node.js - Top 50 Interview Questions and Answers for Beginners
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Are you preparing for a Node.js interview? This video covers Node js interview questions and answers for freshers and experienced candidates. Learn about basics of Node.js, event-driven architecture, asynchronous programming, modules, callbacks, promises, async/await, middleware, REST APIs, Express.js, error handling, streams, and more. We'll cover everything from basic to advanced and scenario-based questions to help you clear Node.js interview.
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Express JS Interview Questions | Top 50 Interview Questions with Answers

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Role of backend in web applications
HTTP requests and methods (GET, POST, PUT, DELETE)
How servers handle client requests
Difference between relational (SQL) and non-relational (NoSQL) databases
Environment variables and their importance
API concepts and usage in backend development
Primary keys and indexing
Database schema design (e.g., blogs, e-commerce)
SQL vs NoSQL trade-offs
Database normalization and denormalization
Caching strategies (Redis, Memcached)
Database replication, sharding, and scaling
Eventual consistency vs strong consistency
Multi-tenant database schema design
Database recovery and disaster management
RESTful API design principles
API authentication (JWT, OAuth) vs authorization
API versioning strategies
Securing APIs against SQL Injection, CSRF, XSS
Handling long-running tasks in APIs
Pagination techniques for large datasets
Idempotency in API requests (e.g., Payment APIs)
Rate limiting using Token Bucket Algorithm
Monolithic vs microservices architecture
Horizontal vs vertical scaling strategies
High-availability systems (HA architecture)
Load balancing (round-robin, least connections)
Circuit breaker patterns for fault tolerance
Handling high-traffic spikes in backend services
Optimizing slow SQL queries
Connection pooling in high-traffic applications
WebSockets and real-time messaging (e.g., chat apps, stock updates)
Designing a content delivery system (CDN, edge computing)
Push notifications (SMS, email, Firebase Cloud Messaging)
Asynchronous job processing (RabbitMQ, Kafka, Celery)
Distributed transactions and their challenges
This video tackles 30 backend interview ques
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MERN Stack Interview Questions | Node Js Interview Questions | MERN Interview Questions | Node | Mongodb | React | Express JS
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Top 30 Express.JS Interview Questions And Answers | Best Node.JS Interview Questions
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This Express.JS Interview Questions and Answers video includes all the frequently asked Interview questions that give you an idea to crack your Express.JS interview smartly. These Interview questions are curated by experts and will help you to brush up your knowledge in Express.JS. This video session is designed for both beginners and professionals who want to prepare for an Express.JS Interview.
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