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93 interview questions on NodeJSfor developers (2024)

Test your technical skills before an interview of NodeJS with 93 corrected questions. Beginner, Intermediate or Expert level.

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93 questions
Expert
7 votes735 runs0 comment

How to define a global variable with Node.js?

Back-end developer
variables
node.js
Jean-marie Cléryat May 11, 2022
Medium
3 votes739 runs0 comment

Parse a query string into an object in NodeJS

Back-end developer
javascript
node.js
Jean-marie Cléryat May 11, 2022
Hard
2 votes810 runs0 comment

How to get the result of 3 asynchronous functions in NodeJS

Back-end developer
promises
async
javascript
Jean-marie Cléryat May 11, 2022
Medium
2 votes738 runs0 comment

Which of these 4 solutions for serving a very large file will be the most optimized in terms of _server resources_ and _loading speed for the client_?

Back-end developer
nodejs
file
server
Jean-marie Cléryat May 11, 2022
Hard
2 votes711 runs0 comment

Write a NodeJS server that returns a different message depending on the route.

Back-end developer
http
server
Jean-marie Cléryat May 11, 2022
Medium
2 votes224 runs0 comment

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

Back-end developer
performance
gzip
Vincent Cotroat Nov 15, 2023
Medium
1 vote787 runs0 comment

What will the `result` variable contain at the end of this code?

Back-end developer
promises
async/await
Jean-marie Cléryat May 11, 2022
Hard
1 vote783 runs0 comment

What does a dependency marked as `^4.2.x` in the `package.json` mean?

Back-end developer
dependencies
semver
Jean-marie Cléryat May 11, 2022
Medium
1 vote774 runs0 comment

Given a tree structure and Express middlewares, which file will be returned when calling the `tutorial.mp4` resource?

Back-end developer
express
static
Jean-marie Cléryat May 11, 2022
Hard
1 vote769 runs0 comment

A simple SocketIO chat server, coupled with Express.

Back-end developer
socket.io
websockets
Jean-marie Cléryat May 11, 2022
Easy
1 vote758 runs1 comment

What is the advantage of using mongoose over MongoDB.MongoClient to deal with a MongoDB database?

Back-end developer
mongoose
mongodb
models
Jean-marie Cléryat May 11, 2022
Hard
1 vote754 runs0 comment

Fix the following code:

Back-end developer
callback
this
Jean-marie Cléryat May 11, 2022
Easy
1 vote753 runs0 comment

Include a module in NodeJS

Back-end developer
modules
require
Jean-marie Cléryat May 11, 2022
Hard
1 vote752 runs1 comment

Write a NodeJS program that logs the contents of a file.

Back-end developer
error handling
file system
Jean-marie Cléryat May 11, 2022
Expert
1 vote746 runs0 comment

Write a generator function in NodeJS that yields the numbers from 0 to infinity.

Back-end developer
generators
yield
Jean-marie Cléryat May 11, 2022
Hard
1 vote723 runs2 comments

Given the following ES2015 class and code, who will be holding the ring at the end of the execution?

Back-end developer
class
constructor
static
Jean-marie Cléryat May 11, 2022
Easy
1 vote671 runs0 comment

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

Back-end developer
databases
node.js
Léoat Mar 28, 2022
Easy
1 vote670 runs0 comment

What is NPM?

Back-end developer
package manager
npm
Léoat Mar 28, 2022
Easy
1 vote622 runs0 comment

How to start a NodeJS server

Back-end developer
node
server
Vincent Cotroat May 18, 2022
Hard
1 vote376 runs1 comment

In which phase of the event loop is the callback passed to the ```setImmediate``` function executed?

Back-end developer
event loop
callback
Axelat Sep 5, 2022
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