Node.js Interview - Beginner Level
Perfect for developers with 0-2 years of Node.js experience. Master the fundamentals of Node.js, basic async programming, and simple server development.
15-20 minutes
0-2 years of Node.js experience
Who is this for?
Developers new to Node.js
JavaScript developers learning backend
Students learning server-side development
Anyone preparing for junior Node.js roles
What you'll practice
Explaining what Node.js is and when to use it
Understanding blocking vs non-blocking I/O
Working with callbacks and basic promises
Using npm and managing packages
Building simple HTTP servers with Express.js
Reading and writing files
Topics covered
Node.js Fundamentals
What is Node.js and why use it
Event loop basics
Blocking vs non-blocking I/O
require() vs import
Asynchronous Programming
Callbacks
Basic Promises
Error handling in async code
NPM & Modules
package.json basics
Installing packages
Creating modules
Simple APIs
HTTP server basics
Express.js fundamentals
Basic routing
Handling requests and responses
Example questions
Q:
What is Node.js and why would you use it over other backend technologies?
Q:
Can you explain the difference between blocking and non-blocking code?
Q:
What is a callback and how do you use it in Node.js?
Q:
What is the purpose of package.json?
Q:
How do you create a simple HTTP server in Node.js?
Q:
What is the difference between require() and import?
Preparation tips
Understand what makes Node.js different from browser JavaScript
Practice writing simple async code with callbacks
Build a basic Express.js server
Learn npm basics - install, update, remove packages
Read about the event loop at a high level
Practice explaining concepts in your own words
Continue your journey
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