Node.js Quiz ( Beginner ) - All Questions

This easy-level Node.js quiz is perfect for beginners who want to test their understanding of core Node.js fundamentals. It focuses on basic concepts like runtime, modules, event loop, npm, and simple server-side logic to build a strong foundation.

Question 1: What is Node.js?

A JavaScript framework
A JavaScript runtime environment
A database
A programming language

Explanation: Node.js is a runtime environment that allows JavaScript to run outside the browser.

Question 2: Node.js is built on which JavaScript engine?

SpiderMonkey
Chakra
V8
JavaScriptCore

Explanation: Node.js uses Google's V8 JavaScript engine.

Question 3: Which company developed Node.js?

Google
Microsoft
Facebook
Joyent

Explanation: Node.js was originally developed by Joyent.

Question 4: Which command is used to check the Node.js version?

node --version
node -v
npm version
check node

Explanation: node -v displays the installed Node.js version.

Question 5: What does npm stand for?

Node Package Manager
New Project Manager
Node Program Module
Network Package Manager

Explanation: npm stands for Node Package Manager.

Question 6: Which file stores project metadata in Node.js?

node.json
config.json
package.json
project.json

Explanation: package.json stores project details and dependencies.

Question 7: Which module system is used by default in Node.js?

ES Modules
CommonJS
AMD
UMD

Explanation: Node.js uses the CommonJS module system by default.

Question 8: Which keyword is used to import a module in CommonJS?

import
include
require
load

Explanation: require is used to import CommonJS modules.

Question 9: Which keyword is used to export a module in CommonJS?

export
exports
module.exports
default

Explanation: module.exports is used to export modules in CommonJS.

Question 10: Node.js is best suited for which type of applications?

CPU-intensive applications
I/O-intensive applications
Desktop applications
Embedded systems

Explanation: Node.js excels at handling I/O-intensive tasks.

Question 11: Which built-in module is used to create a web server?

fs
http
url
path

Explanation: The http module is used to create servers.

Question 12: Which method starts an HTTP server?

server.run()
server.start()
server.listen()
server.open()

Explanation: server.listen() starts the server.

Question 13: Which Node.js module is used to work with files?

http
path
fs
os

Explanation: The fs module is used for file system operations.

Question 14: What does non-blocking I/O mean?

Tasks block the main thread
Tasks execute one by one
Tasks execute asynchronously
Tasks execute slower

Explanation: Non-blocking I/O allows tasks to run asynchronously.

Question 15: Which core concept allows Node.js to handle multiple requests efficiently?

Multi-threading
Event loop
Forking
Polling

Explanation: The event loop enables asynchronous request handling.

Question 16: Which object represents the current module?

this
global
module
exports

Explanation: The module object represents the current module.

Question 17: Which global object is available everywhere in Node.js?

window
document
global
browser

Explanation: global is the global object in Node.js.

Question 18: Which function is used to read command-line arguments?

process.argv
process.env
console.args
node.args

Explanation: process.argv contains command-line arguments.

Question 19: Which module provides information about the operating system?

fs
path
os
util

Explanation: The os module provides OS-related information.

Question 20: Which Node.js module helps in handling file paths?

url
path
fs
http

Explanation: The path module helps manage file paths.

Question 21: Which HTTP method is commonly used to fetch data?

POST
PUT
GET
DELETE

Explanation: GET is used to retrieve data.

Question 22: What does the fs.readFile method do?

Writes to a file
Deletes a file
Reads file content asynchronously
Renames a file

Explanation: fs.readFile reads file content asynchronously.

Question 23: Which keyword stops Node.js execution?

stop()
exit()
process.exit()
terminate()

Explanation: process.exit() terminates the Node.js process.

Question 24: What type of language is JavaScript in Node.js?

Compiled
Interpreted
Assembly
Low-level

Explanation: JavaScript is an interpreted language.

Question 25: Which file extension is commonly used for Node.js files?

.node
.javascript
.js
.jsx

Explanation: .js is the standard file extension.

Question 26: Which npm command installs dependencies?

npm start
npm init
npm install
npm run

Explanation: npm install installs project dependencies.

Question 27: What does npm init do?

Starts the server
Creates package.json
Installs Node.js
Runs tests

Explanation: npm init creates a package.json file.

Question 28: Which keyword handles errors in async callbacks?

throw
catch
if
error

Explanation: catch is used to handle errors in promises.

Question 29: Which method sends a response to the client?

res.send()
req.send()
req.write()
res.read()

Explanation: res.send() sends a response.

Question 30: What is the default package manager for Node.js?

Yarn
pnpm
npm
Bower

Explanation: npm is bundled with Node.js.

Question 31: Which Node.js feature supports asynchronous code?

Callbacks
Promises
Async/Await
All of the above

Explanation: Node.js supports callbacks, promises, and async/await.

Question 32: Which module helps convert callback-based APIs to promises?

fs
util
events
http

Explanation: util.promisify converts callbacks to promises.

Question 33: What does event-driven architecture mean?

Code runs sequentially
Code reacts to events
Code runs in threads
Code blocks execution

Explanation: Node.js responds to events asynchronously.

Question 34: Which object emits events in Node.js?

Emitter
EventEmitter
Dispatcher
Listener

Explanation: EventEmitter is used to emit and listen to events.

Question 35: Which Node.js module handles events?

events
stream
buffer
crypto

Explanation: The events module provides event handling.

Question 36: What is a callback function?

A function called immediately
A function passed as an argument
A function that returns data
A function that blocks code

Explanation: Callbacks are functions passed to other functions.

Question 37: Which method writes data to a file?

fs.readFile
fs.appendFile
fs.writeFile
fs.open

Explanation: fs.writeFile writes data to a file.

Question 38: Which module provides cryptographic functionality?

crypto
secure
hash
encrypt

Explanation: The crypto module provides cryptographic features.

Question 39: What does process.env store?

Command-line arguments
Environment variables
Node.js version
Project dependencies

Explanation: process.env contains environment variables.

Question 40: Which object represents the incoming request?

req
res
request
http

Explanation: req represents the client request.

Question 41: Which object represents the server response?

res
req
response
server

Explanation: res is used to send responses.

Question 42: Which function schedules code execution after a delay?

setInterval
setImmediate
setTimeout
delay

Explanation: setTimeout executes code after a delay.

Question 43: Which function repeats execution at intervals?

setTimeout
setInterval
repeat()
loop()

Explanation: setInterval runs code repeatedly at intervals.

Question 44: Which Node.js module is used for streams?

buffer
stream
fs
pipe

Explanation: The stream module handles streaming data.

Question 45: What does buffer represent in Node.js?

Text data
Binary data
JSON data
HTML data

Explanation: Buffers handle raw binary data.

Question 46: Which command removes a dependency?

npm delete
npm uninstall
npm remove
npm clean

Explanation: npm uninstall removes a dependency.

Question 47: What is the main use of Node.js?

Frontend development
Server-side development
Game engines
Mobile UI

Explanation: Node.js is primarily used for backend development.

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Node.js Quiz ( Beginner )

Questions

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