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NodeJS Basics

1/25 How do you install a package using npm?
- npm install package-name
- npm get package-name
- install npm package-name
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 Which of the following is an EventEmitter function used to register a listener for a named event?
- event.on()
- event.listen()
- event.register()
4/25 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
5/25 How do you update npm to its latest version?
- npm update npm
- npm install -g npm@latest
- npm upgrade npm
6/25 What does the 'require' function do in Node.js?
- Loads a JavaScript library
- Imports a module
- Requests data from a web service
7/25 What is the command to list all the global packages installed with npm?
- npm list -g
- npm global list
- npm show all
8/25 How do you enable strict mode in a Node.js file?
- use strict;
- enable strict;
- strict mode;
9/25 Which method in the fs module is used to asynchronously delete a file?
- fs.unlink()
- fs.remove()
- fs.delete()
10/25 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
11/25 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
12/25 How can you access the query string parameters in an Express route?
- req.query
- req.params
- req.body
13/25 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
14/25 What is the output of 'console.log(1 + '2' + 3)' in Node.js?
- '123'
- 6
- '15'
15/25 Which module is used to create a web server in Node.js?
- http
- server
- net
16/25 In Node.js, what does the 'path.join()' method do?
- Joins all given path segments together
- Joins two arrays into one
- Concatenates two strings
17/25 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
18/25 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
19/25 Which function is used to read data from a readable stream in Node.js?
- stream.read()
- stream.getData()
- stream.fetch()
20/25 How can you ensure your dependencies are installed at the exact versions listed in your package-lock.json?
- npm install --exact
- npm ci
- npm install --lock
21/25 What is the command to list installed packages in a Node.js project?
- npm list
- npm installed
- node list-packages
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 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 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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