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NodeJS Basics

1/25 What is Node.js primarily used for?
- Front-end development
- Back-end development
- Graphic design
2/25 Which of the following are true about Node.js streams?
- Streams are used to handle reading/writing files
- Streams can only be used for network communications
- Streams allow Node.js to process data in chunks, improving performance for large data processing
- Streams are a collection of data that must be buffered entirely before processing
3/25 How can you debug a Node.js application?
- Using the debugger statement and Node.js inspector
- Using console.log() statements only
- By restarting the Node.js server multiple times
4/25 How does Node.js handle non-blocking operations?
- Using callbacks
- Using promises
- Using async/await syntax
- By pausing the execution of the entire application
5/25 What is the default scope of Node.js modules?
- Global
- Local to the file they are defined in
- Local to the directory they are located in
6/25 Which of the following is NOT a valid stream in Node.js?
- ReadStream
- WriteStream
- QuickStream
7/25 Which of the following methods can be used to prevent a program from exiting immediately in Node.js?
- process.exit()
- process.stayAlive()
- setInterval()
8/25 Which of the following allows Node.js to provide a non-blocking I/O model?
- Single-threaded model
- Use of the libuv library
- Multi-threaded model
- Synchronous execution
9/25 How do you update npm to its latest version?
- npm update npm
- npm install -g npm@latest
- npm upgrade npm
10/25 Which Node.js module is used to work with file paths?
- fs
- path
- file
11/25 What is the command to list all the global packages installed with npm?
- npm list -g
- npm global list
- npm show all
12/25 How can you capture command line arguments in a Node.js application?
- Using process.argv
- Using console.args
- Using process.arguments
13/25 What does the Node.js os module provide?
- Functions for interacting with the operating system
- Methods for online storage
- Utilities for network operations
- Information about the current operating system
14/25 How can you ensure that a function is executed after all callbacks have completed in Node.js?
- Using the async module's series method
- Using the Promise.all method
- By nesting callbacks
- Using the EventEmitter class
15/25 What is the use of the 'express' package in Node.js?
- Data encryption
- Web application framework
- File compression
16/25 Which file extension is commonly used for Node.js modules?
- .node
- .js
- .npm
17/25 What is the purpose of the 'util.promisify' function in Node.js?
- To convert a callback-based function into a promise-based one
- To create a new Promise object
- To optimize utility functions for performance
18/25 In Node.js, how can you listen for and respond to uncaught exceptions?
- process.on('uncaughtException', function(err) {});
- try...catch on the global level
- window.onerror for Node.js applications
19/25 Which command is used to create a new Node.js project?
- npm new project
- npm init
- node start
20/25 Which of the following statements about Node.js is true?
- Node.js can only run on Linux operating systems
- Node.js is a single-threaded, non-blocking, asynchronous programming environment
- Node.js does not support ES6 features
21/25 Which of the following are considered best practices in Node.js error handling?
- Using try/catch for synchronous code
- Using process.on('error', callback) for global error handling
- Handling errors at the root level of the application
- Using Promises or async/await for asynchronous error handling
22/25 In Node.js, which is the correct way to import a module stored in a file named 'example.js'?
- var example = require('./example.js')
- import example from './example.js'
- include './example.js'
23/25 What does the 'util.inspect()' method do in Node.js?
- Converts an object into a string representation
- Inspects the performance of a Node.js application
- Checks the usability of a module
24/25 How do you make an HTTP POST request using the Axios library in Node.js?
- axios.post('/url', { data })
- axios('/url', 'POST', { data })
- axios.send('POST', '/url', { data })
25/25 Which method is an effective way to handle rejected promises in async/await syntax in Node.js?
- Using a try/catch block
- Using the .catch() method on each promise
- Using process.on('unhandledRejection', handler)
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