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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 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
3/25 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
4/25 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
5/25 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
6/25 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
7/25 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
8/25 Which method is used to read the content of a file in Node.js?
- fs.readFile()
- fs.readContent()
- fs.getContent()
9/25 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
10/25 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
11/25 In Node.js, which method is used to spawn a child process?
- process.spawn()
- child_process.spawn()
- system.spawnProcess()
12/25 Which of the following correctly checks for the presence of an environment variable in Node.js?
- if (process.env.VAR_NAME) {}
- if (env.VAR_NAME) {}
- if (system.getEnv('VAR_NAME')) {}
13/25 How can you securely store sensitive data like passwords in Node.js applications?
- Using the crypto module for hashing and encryption
- Storing them in a .env file as plain text
- Using local storage for persistence
- Encrypting them with the fs module
14/25 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
15/25 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
16/25 What is the primary use of the Node.js 'events' module?
- Logging events to a file
- Creating and handling custom events
- Scheduling events for future execution
17/25 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
18/25 How can you access the query string parameters in an Express route?
- req.query
- req.params
- req.body
19/25 What is the output of 'console.log(1 + '2' + 3)' in Node.js?
- '123'
- 6
- '15'
20/25 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
21/25 How do you send a status code of 404 with a message in Express?
- res.status(404).send('Not Found')
- res.send(404, 'Not Found')
- res.sendStatus('404 Not Found')
22/25 Which of the following is true for process.nextTick() in Node.js?
- It is used to defer the execution of a function until the next loop iteration
- It schedules a function to execute at the beginning of the next event loop
- It is the same as setting a timeout with zero milliseconds
23/25 How can template literals be used in Node.js?
- For defining SQL queries
- To concatenate strings and variables
- To create HTML templates
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 Node.js method is used to execute a function after a specified number of milliseconds?
- setTimeout()
- nextTick()
- setInterval()
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