39 interview questions on Node.js - Fundamentals for developers (2025)

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39 interview questions on Node.js - Fundamentalsfor developers (2025)

Test your technical skills before an interview of Node.js - Fundamentals with 39 corrected questions. Beginner, Intermediate or Expert level.

39 interview questions on Node.js - Fundamentalsfor developers (2025)

Test your technical skills before an interview of Node.js - Fundamentals with 39 corrected questions. Beginner, Intermediate or Expert level.

What is the best practice to apply in your code to improve the performance of your application?

How to start a NodeJS server

Install a NPM package via CLI

Which class is used to create custom events in Node.js?

Write a Node.js code that emits an event and logs it to the console.

Start a REPL session on Node.js

What does npm mean?

In which request header is a token usually sent?

What types of databases can a node.js application access?

What is NPM?

Node.js is a Javascript execution "runtime" based on V8 engine

When creating an HTTP server with Node, we use the **createServer()** function. We can pass a function to **createServer()** that will react to incoming requests. What arguments does this function receive?

Which of the following is not a valid HTTP method?

Is it generally acceptable to store unencrypted passwords in a database if that database requires an access password?

When can a CORS error occur?

What is the name of the JavaScript API that allows you to manipulate the content of a page?

How to see the different commands of npm?

What does the `npm init` command do?

Display the operating system platform in NodeJS

How to check the version of Node.js installed?

When creating an HTTP server with Node, we use the createServer() function. We can pass a function to createServer() that will react to incoming requests. What arguments does this function receive?