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NodeJS Basics

1/25 What does the 'event loop' in Node.js do?
- Handles asynchronous I/O operations
- Generates events for the application
- Loops through an array of events
2/25 What does the async/await syntax in Node.js provide?
- A way to execute SQL queries
- A cleaner syntax for working with promises
- Synchronous blocking operations
- Immediate execution of asynchronous code
3/25 Which of the following is true about the process object in Node.js?
- It provides information about the current Node.js process
- It's only available in the browser environment
- It allows Node.js to communicate with the operating system's process management
- It is used to start a new Node.js process
4/25 What command is used to remove a package in Node.js using npm?
- npm delete package-name
- npm remove package-name
- npm uninstall package-name
5/25 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
6/25 Which of the following best describes the Node.js global object?
- An object that provides functions and variables that can be used anywhere in the application
- A global variable that stores user session data
- A module that needs to be imported before use
7/25 How does Node.js handle non-blocking operations?
- Using callbacks
- Using promises
- Using async/await syntax
- By pausing the execution of the entire application
8/25 Which method is used to read the content of a file in Node.js?
- fs.readFile()
- fs.readContent()
- fs.getContent()
9/25 What does NPM stand for?
- Node Package Manager
- Network Protocol Module
- New Programming Methodology
10/25 Which of the following methods can be used to prevent a program from exiting immediately in Node.js?
- process.exit()
- process.stayAlive()
- setInterval()
11/25 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
12/25 What does the 'require' function do in Node.js?
- Loads a JavaScript library
- Imports a module
- Requests data from a web service
13/25 What is the purpose of the .env file in Node.js applications?
- To set environment variables
- To configure the Node.js runtime environment
- To store encrypted variables
14/25 Which Node.js module is used to work with file paths?
- fs
- path
- file
15/25 In Node.js, which method is used to spawn a child process?
- process.spawn()
- child_process.spawn()
- system.spawnProcess()
16/25 What is the use of the 'express' package in Node.js?
- Data encryption
- Web application framework
- File compression
17/25 Which method in the fs module is used to asynchronously delete a file?
- fs.unlink()
- fs.remove()
- fs.delete()
18/25 Which of the following is a benefit of using TypeScript with Node.js?
- Automatic error correction in runtime
- Static typing and compile-time error checking
- Increased runtime performance
- Direct access to Node.js API without imports
19/25 In Node.js, what is a middleware in the context of Express applications?
- A database management system
- Functions that have access to the request object, the response object, and the next middleware function
- A client-side JavaScript library
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 What does the 'nodemon' tool provide for Node.js development?
- Automatic restart of your Node.js application when file changes in the directory are detected
- A node version manager
- Monitoring of Node.js application performance
22/25 Which environment variable is commonly used to set the port for a Node.js web server?
- PORT
- SERVER_PORT
- HTTP_PORT
23/25 Which of these statements about the Node.js 'crypto' module is true?
- It provides cryptographic functionality that includes a set of wrappers for OpenSSL's hash, HMAC, cipher, decipher, sign, and verify functions
- It is used for creating cryptographically secure random numbers
- It can only encrypt data but cannot decrypt
24/25 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
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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