Node.js Essentials

Check your understanding of Node.js modules,event-driven programming,and file systems.

1. What type of runtime environment is Node.js primarily designed for?

Client-side web development Server-side scripting Mobile application development Desktop GUI applications

2. Which of the following are core modules in Node.js?

fs express path react

3. Node.js is single-threaded by default.

True False

4. What does 'npm' stand for (full name)?

5. Which object provides access to command-line arguments in Node.js?

process.argv global.args console.input env.parameters

6. Which of the following are valid ways to export modules in Node.js (CommonJS)?

module.exports export default exports return statement

7. The 'require()' function in Node.js loads modules asynchronously.

True False

8. What is the name of the mechanism that allows Node.js to handle non-blocking I/O operations efficiently?

9. Which core module is used to create an HTTP server in Node.js?

http server net web

10. Which of the following are asynchronous operations in Node.js?

fs.readFile() setTimeout() fs.readFileSync() setImmediate()

11. Node.js can directly access the DOM (Document Object Model) like a web browser.

True False

12. What command initializes a new Node.js project and creates a package.json file?

13. Which method is used to make a Node.js HTTP server listen for incoming requests?

server.listen() http.start() server.run() http.listen()

14. Which of the following are error-handling patterns in Node.js callbacks?

First parameter as error object Using try/catch blocks Throwing errors with throw keyword error event listeners

15. Async/await is a syntactic sugar over Promises in Node.js.

True False

16. What is the default file name for the entry point of a Node.js application when running 'node .'?

17. Which core module provides utilities for working with file and directory paths?

path fs dir file

18. Which of the following are core modules in Node.js for network operations?

http net dns socket.io

19. Node.js is built on the V8 JavaScript engine developed by Google.

True False

20. What is the primary purpose of the 'Buffer' class in Node.js?

Storing and manipulating binary data Caching HTTP responses Managing memory leaks Handling JSON data

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