Node.js is an open-source, server-side, and cross-platform JavaScript runtime environment that allows developers to build scalable and high-performance applications. It is built on the V8 JavaScript engine, which is the same engine that powers the Google Chrome web browser, and it executes JavaScript code outside of a web browser. This means that developers can use JavaScript to build server-side applications, unlike traditional JavaScript that runs only on the client-side in web browsers.
Node.js is commonly used for building web servers, API servers, microservices, real-time applications, and any application that requires event-driven, non-blocking I/O for better performance. It has gained significant popularity in web development due to its efficiency, scalability, and the ability to handle concurrent connections effectively. As a result, many large-scale companies and startups have adopted Node.js for building their applications and services.
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Table of content
- Part 1: 30 Node.js quiz questions & answers
- Part 2: Download Node.js questions & answers for free
- Part 3: Free online quiz platform – OnlineExamMaker
Part 1: 30 Node.js quiz questions & answers
1. What is Node.js?
a) A front-end JavaScript framework
b) A server-side JavaScript runtime environment
c) A database management system
d) An operating system
Answer: b) A server-side JavaScript runtime environment
2. Which engine is used by Node.js to execute JavaScript code?
a) WebKit
b) V8
c) Gecko
d) Trident
Answer: b) V8
3. What is the primary advantage of using Node.js for server-side development?
a) It is a compiled language
b) It supports multiple programming languages
c) It allows for asynchronous, non-blocking I/O operations
d) It is more secure than other runtime environments
Answer: c) It allows for asynchronous, non-blocking I/O operations
4. What is the package manager used in Node.js?
a) Nginx
b) npm
c) Apache Maven
d) Gulp
Answer: b) npm
5. Which of the following is NOT a core module in Node.js?
a) fs (File System)
b) http
c) url (Uniform Resource Locator)
d) ajax
Answer: d) ajax
6. How can you include external modules in a Node.js application?
a) By using the import keyword
b) By using the include keyword
c) By using the require() function
d) By using the import() function
Answer: c) By using the require() function
7. Which of the following is used to handle asynchronous operations in Node.js?
a) Callbacks
b) Synchronous functions
c) While loops
d) For loops
Answer: a) Callbacks
8. What is the purpose of the “fs” module in Node.js?
a) To perform file system operations
b) To handle HTTP requests
c) To manage databases
d) To create user interfaces
Answer: a) To perform file system operations
9. What is the role of the “http” module in Node.js?
a) To handle WebSocket communication
b) To perform HTTP and HTTPS operations
c) To manage user authentication
d) To create web components
Answer: b) To perform HTTP and HTTPS operations
10. How does Node.js handle concurrent connections efficiently?
a) By using multi-threading
b) By using synchronous I/O operations
c) By using asynchronous, non-blocking I/O operations
d) By using server-side caching
Answer: c) By using asynchronous, non-blocking I/O operations
11. Which of the following modules is commonly used for building web servers in Node.js?
a) url
b) fs
c) http
d) ajax
Answer: c) http
12. What is the purpose of the “url” module in Node.js?
a) To perform URL parsing and formatting
b) To manage user authentication
c) To handle file system operations
d) To create web components
Answer: a) To perform URL parsing and formatting
13. How can you install external packages using npm in a Node.js project?
a) Using the “install” command
b) Using the “download” command
c) Using the “npm add” command
d) Using the “npm install” command
Answer: d) Using the “npm install” command
14. What is the purpose of the “path” module in Node.js?
a) To perform mathematical operations
b) To manage user authentication
c) To handle file paths
d) To create web components
Answer: c) To handle file paths
15. Which of the following is used to create a basic HTTP server in Node.js?
a) http.createServer()
b) http.server()
c) http.newServer()
d) http.buildServer()
Answer: a) http.createServer()
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16. How can you handle errors in asynchronous functions in Node.js?
a) By using try-catch blocks
b) By using synchronous functions
c) By using while loops
d) By using for loops
Answer: a) By using try-catch blocks
17. What is the purpose of the “querystring” module in Node.js?
a) To handle query parameters in URLs
b) To manage user authentication
c) To perform mathematical operations
d) To create web components
Answer: a) To handle query parameters in URLs
18. Which of the following is used to read data from a stream in Node.js?
a) fs.writeFile()
b) fs.readFile()
c) fs.createReadStream()
d) fs.createWriteStream()
Answer: c) fs.createReadStream()
19. What is the role of the “crypto” module in Node.js?
a) To handle file system operations
b) To perform mathematical operations
c) To manage user authentication
d) To provide cryptographic functionality
Answer: d) To provide cryptographic functionality
20. Which of the following is NOT a valid method of the “http” module in Node.js?
a) http.get()
b) http.post()
c) http.put()
d) http.createServer()
Answer: b) http.post()
21. How can you install a specific version of an npm package in a Node.js project?
a) Using the “npm add” command
b) Using the “npm version” command
c) Using the “npm install” command with the package name and version
d) Using the “npm upgrade” command
Answer: c) Using the “npm install” command with the package name and version
22. What is the purpose of the “events” module in Node.js?
a) To handle file system operations
b) To manage user authentication
c) To provide event-driven functionality
d) To perform mathematical operations
Answer: c) To provide event-driven functionality
23. Which of the following modules is used to work with query parameters in URLs in Node.js?
a) querystring
b) http
c) fs
d) url
Answer: a) querystring
24. What is the purpose of the “child_process” module in Node.js?
a) To handle child processes in a Node.js application
b) To manage user authentication
c) To perform mathematical operations
d) To create web components
Answer: a) To handle child processes in a Node.js application
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25. How can you handle data sent in the request body of an HTTP POST request in Node.js?
a) By using the “request” event of the “http” module
b) By using the “data” event of the “http” module
c) By using the “query” event of the “http” module
d) By using the “body” event of the “http” module
Answer: b) By using the “data” event of the “http” module
26. Which of the following is used to send data in the response body of an HTTP request in Node.js?
a) res.send()
b) res.write()
c) res.body()
d) res.data()
Answer: b) res.write()
27. What is the purpose of the “os” module in Node.js?
a) To handle file system operations
b) To perform mathematical operations
c) To manage user authentication
d) To provide information about the operating system
Answer: d) To provide information about the operating system
28. Which of the following is used to delete a file in Node.js?
a) fs.deleteFile()
b) fs.unlink()
c) fs.remove()
d) fs.delete()
Answer: b) fs.unlink()
29. What is the role of the “net” module in Node.js?
a) To perform network operations
b) To manage user authentication
c) To handle file system operations
d) To create web components
Answer: a) To perform network operations
30. How can you handle errors in the “http” module in Node.js?
a) By using the “error” event of the “http” module
b) By using the “handleError” method of the “http” module
c) By using the “catchError” method of the “http” module
d) By using the “error” method of the “http” module
Answer: a) By using the “error” event of the “http” module
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