39 interview questions on Node.js - Fundamentals for developers (2026)

Easy

16 votes1009 runs0 comment

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

Back-end developer

performance

gzip

Anonymous authorat Nov 15, 2023

Easy

5 votes990 runs0 comment

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

Back-end developer

events

node.js

Axelat Sep 5, 2023

Easy

4 votes1450 runs0 comment

Install a NPM package via CLI

Back-end developer

cli

npm

Anonymous authorat Mar 28, 2022

Easy

4 votes1386 runs0 comment

In which request header is a token usually sent?

Back-end developer

headers

authorization

Anonymous authorat Mar 28, 2022

Easy

4 votes1353 runs0 comment

How to start a NodeJS server

Back-end developer

node

server

Anonymous authorat May 18, 2022

Easy

3 votes1361 runs0 comment

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

Back-end developer

databases

node.js

Anonymous authorat Mar 28, 2022

Easy

3 votes1355 runs0 comment

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

Back-end developer

classes

events

Anonymous authorat Mar 28, 2022

Easy

3 votes1350 runs0 comment

What is NPM?

Back-end developer

package manager

npm

Anonymous authorat Mar 28, 2022

Easy

3 votes1023 runs1 comment

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

Back-end developer

javascript

runtime

Anonymous authorat Jun 8, 2023

Medium

2 votes1451 runs0 comment

Start a REPL session on Node.js

Back-end developer

repl

node

Anonymous authorat Mar 28, 2022

Easy

1 vote1399 runs0 comment

What does npm mean?

Back-end developer

package manager

npm

Anonymous authorat Mar 28, 2022

Easy

1 vote1365 runs0 comment

When can a CORS error occur?

Back-end developer

cors

errors

Anonymous authorat Mar 28, 2022

Easy

1 vote1345 runs0 comment

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

Back-end developer

javascript

api

Anonymous authorat Mar 28, 2022

Easy

1 vote1047 runs0 comment

How to see the different commands of npm?

Back-end developer

npm

commands

Anonymous authorat Mar 28, 2022

Medium

1 vote810 runs0 comment

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?

Back-end developer

functions

arguments

Emeric Penel-Francisodat Mar 15, 2024

Medium

1 vote768 runs

1 comment

Display the operating system platform in NodeJS

Back-end developer

os

console

Anonymous authorat Mar 28, 2022

Easy

1 vote537 runs0 comment

Which of the following is not a valid HTTP method?

Back-end developer

http

methods

Anonymous authorat Mar 28, 2022

Easy

1 vote525 runs0 comment

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

Back-end developer

security

database

Anonymous authorat Mar 28, 2022

Medium

1 vote505 runs0 comment

What is the use of the underscore variable '_' in a REPL session?

Back-end developer

repl

node

Anonymous authorat Jan 24, 2023

Easy

1 vote203 runs

1 comment

What does the hash function of bcrypt do?

Back-end developer

bcrypt

encryption

Anonymous authorat Mar 28, 2022

39 interview questions on Node.js - Fundamentalsfor developers (2026)

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?

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

Install a NPM package via CLI

In which request header is a token usually sent?

How to start a NodeJS server

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

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

What is NPM?

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

Start a REPL session on Node.js

What does npm mean?

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?

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?

Display the operating system platform in NodeJS

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?

What is the use of the underscore variable '_' in a REPL session?

What does the hash function of bcrypt do?

39 interview questions on Node.js - Fundamentalsfor developers (2026)

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?

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

Install a NPM package via CLI

In which request header is a token usually sent?

How to start a NodeJS server

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

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

What is NPM?

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

Start a REPL session on Node.js

What does npm mean?

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?

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?

Display the operating system platform in NodeJS

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?

What is the use of the underscore variable '_' in a REPL session?

What does the **hash** function of bcrypt do?

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?

What does the hash function of bcrypt do?