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NodeJS Basics

1/25 How can you make a function available in all modules of your Node.js application?
- Declare it globally
- Export the function using module.exports
- Copy the function into each module
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 Which of the following is an EventEmitter function used to register a listener for a named event?
- event.on()
- event.listen()
- event.register()
5/25 What is the purpose of the Buffer class in Node.js?
- To handle binary data
- To buffer all the application data in memory
- To manage application caching
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 What is the main difference between npm and npx?
- npm is a package manager, while npx is a tool to execute packages
- npx is a JavaScript runtime, npm is not
- npm installs packages globally, while npx does not
- There is no difference; they are the same tool
9/25 What is the purpose of the package.json file in a Node.js application?
- To store configuration settings
- To define the application entry point
- To list dependencies and scripts
- To compile the application code
10/25 How do you update npm to its latest version?
- npm update npm
- npm install -g npm@latest
- npm upgrade npm
11/25 What does the 'require' function do in Node.js?
- Loads a JavaScript library
- Imports a module
- Requests data from a web service
12/25 What is the command to list all the global packages installed with npm?
- npm list -g
- npm global list
- npm show all
13/25 What is the significance of package-lock.json in a Node.js project?
- It locks the versions of the packages installed
- It automatically updates packages to their latest versions
- It is a backup of the package.json file
- It speeds up the npm install process
14/25 In Node.js, which method is used to spawn a child process?
- process.spawn()
- child_process.spawn()
- system.spawnProcess()
15/25 What is the use of the 'express' package in Node.js?
- Data encryption
- Web application framework
- File compression
16/25 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
17/25 Which of the following are valid HTTP methods supported by the HTTP module in Node.js?
- GET
- SEND
- POST
- REMOVE
18/25 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
19/25 Which environment variable is commonly used to set the port for a Node.js web server?
- PORT
- SERVER_PORT
- HTTP_PORT
20/25 What is the purpose of the 'body-parser' middleware in Express apps?
- To parse incoming request bodies
- To authenticate user requests
- To parse URL parameters
21/25 What are Promises in Node.js used for?
- To handle asynchronous operations
- To execute multiple callbacks sequentially
- To generate cryptographic keys
22/25 Which function is used to read data from a readable stream in Node.js?
- stream.read()
- stream.getData()
- stream.fetch()
23/25 What is the purpose of the Node.js 'cluster' module?
- To distribute incoming network connections across multiple worker processes
- To manage multiple database clusters
- To enable real-time communication between clients and servers
24/25 Which Node.js method is used to execute a function after a specified number of milliseconds?
- setTimeout()
- nextTick()
- setInterval()
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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