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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 is an EventEmitter function used to register a listener for a named event?
- event.on()
- event.listen()
- event.register()
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 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
6/25 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
7/25 What does NPM stand for?
- Node Package Manager
- Network Protocol Module
- New Programming Methodology
8/25 How do you set an environment variable in Node.js?
- process.env.VAR_NAME = 'value';
- set VAR_NAME='value';
- env.set('VAR_NAME', 'value');
9/25 In Node.js, how can you monitor the execution time of an asynchronous operation?
- Using the console.time() and console.timeEnd() methods
- Using the process.time() method
- Using a custom timing module
- It's not possible to accurately measure asynchronous operations
10/25 What is the primary use case for the Node.js crypto module?
- Performing cryptographic operations like hashing and encryption
- Generating random numbers
- Creating secure network connections
- Managing cryptocurrency transactions
11/25 How do you update npm to its latest version?
- npm update npm
- npm install -g npm@latest
- npm upgrade npm
12/25 Which Node.js module is used to work with file paths?
- fs
- path
- file
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 How do you enable strict mode in a Node.js file?
- use strict;
- enable strict;
- strict mode;
17/25 What is the best practice for managing asynchronous code in Node.js?
- Using nested callbacks
- Using Promises and async/await
- Executing synchronous functions in parallel
- Avoiding asynchronous code
18/25 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
19/25 Which module is used to create a web server in Node.js?
- http
- server
- net
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 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
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 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 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 })
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