Node.js Interview Questions

Event loop, streams, clustering, middleware, REST API design, and error handling.

30 questions in this section

Node.js Event Loop & Architecture (Intermediate)
Streams & Buffers (Advanced)
REST API Design & Middleware (Intermediate)
Node.js Basics & Runtime (Beginner)
Module System (CJS vs ESM) (Beginner)
File System Operations (Beginner)
Path & OS Modules (Beginner)
HTTP Module & Server Creation (Beginner)
Express.js Fundamentals (Beginner)
Routing & Route Parameters (Beginner)
Middleware Deep Dive (Intermediate)
Request Validation (Zod/Joi) (Intermediate)
JWT Authentication (Intermediate)
Password Hashing (bcrypt) (Intermediate)
CORS & Security Headers (Intermediate)
Error Handling Patterns (Intermediate)
Database Integration (Prisma/SQL) (Intermediate)
Connection Pooling & N+1 Problem (Intermediate)
Redis Caching (Intermediate)
File Uploads (Multer & S3) (Intermediate)
Environment Variables & Config (Beginner)
Logging (Winston/Pino) (Intermediate)
Testing (Jest & Supertest) (Intermediate)
Rate Limiting & Throttling (Intermediate)
WebSocket & Real-Time (Advanced)
Cluster Module & PM2 (Advanced)
Child Processes & Worker Threads (Advanced)
Graceful Shutdown (Advanced)
Microservices Communication (Advanced)
Performance Profiling (Advanced)

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