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93 interview questions on NodeJSfor developers (2023)

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

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Expert
5 votes654 runs0 comment

How to define a global variable with Node.js?

Back-end developer
NodeJS
variables
node.js
Jean-marie Cléryat May 11, 2022
Medium
2 votes665 runs0 comment

How to get the result of 3 asynchronous functions in NodeJS

Back-end developer
NodeJS
promises
async
javascript
Jean-marie Cléryat May 11, 2022
Medium
1 vote695 runs0 comment

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

Back-end developer
NodeJS
express
static
Jean-marie Cléryat May 11, 2022
Hard
1 vote687 runs1 comment

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

Back-end developer
NodeJS
error handling
file system
Jean-marie Cléryat May 11, 2022
Medium
1 vote684 runs0 comment

Fix the following code:

Back-end developer
NodeJS
callback
this
Jean-marie Cléryat May 11, 2022
Medium
1 vote665 runs0 comment

Parse a query string into an object in NodeJS

Back-end developer
NodeJS
javascript
node.js
Jean-marie Cléryat May 11, 2022
Hard
1 vote650 runs2 comments

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

Back-end developer
NodeJS
class
constructor
static
Jean-marie Cléryat May 11, 2022
Hard
1 vote635 runs0 comment

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

Back-end developer
NodeJS
http
server
Jean-marie Cléryat May 11, 2022
Hard
1 vote359 runs1 comment

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

Back-end developer
NodeJS
event loop
callback
Axelat Sep 5, 2022
Hard
1 vote32 runs1 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
NodeJS
functions
arguments
Léoat Mar 28, 2022
Medium
1 vote12 runs0 comment

What can you expect if the express package version changes to 5.0.0?

Back-end developer
NodeJS
versioning
semver
Coyote futuristeat Sep 4, 2023
Medium
0 vote731 runs0 comment

Write a NodeJS program that reads the file foobar.txt and outputs the lines in reverse order to stdout.

Back-end developer
NodeJS
file
stream
Jean-marie Cléryat May 11, 2022
Medium
0 vote710 runs0 comment

Write a NodeJS code that uses the ES2015 specification.

Back-end developer
NodeJS
generators
iterators
Jean-marie Cléryat May 11, 2022
Hard
0 vote707 runs0 comment

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

Back-end developer
NodeJS
dependencies
semver
Jean-marie Cléryat May 11, 2022
Hard
0 vote707 runs0 comment

Tell Express to use the Pug templating engine

Back-end developer
NodeJS
express
templating
Jean-marie Cléryat May 11, 2022
Hard
0 vote707 runs0 comment

Write a NodeJS code that will print the keys of an object in an array

Back-end developer
NodeJS
array
generator
Jean-marie Cléryat May 11, 2022
Medium
0 vote702 runs0 comment

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

Back-end developer
NodeJS
promises
async/await
Jean-marie Cléryat May 11, 2022
Easy
0 vote699 runs0 comment

How does the event loop work in Node.js?

Back-end developer
NodeJS
event loop
node.js
Jean-marie Cléryat Sep 19, 2022
Easy
0 vote694 runs1 comment

How to set a default task with gulp

Back-end developer
NodeJS
gulp
tasks
Jean-marie Cléryat May 11, 2022
Hard
0 vote693 runs0 comment

How to return an error and a result from an asynchronous function in NodeJS

Back-end developer
NodeJS
callback
error
Jean-marie Cléryat May 11, 2022
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