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NodeJS Basics

1/25 Which of the following is a core module in Node.js?
- Express
- fs
- Bootstrap
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 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
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 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
6/25 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
7/25 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
8/25 How does Node.js handle non-blocking operations?
- Using callbacks
- Using promises
- Using async/await syntax
- By pausing the execution of the entire application
9/25 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
10/25 Which method is used to read the content of a file in Node.js?
- fs.readFile()
- fs.readContent()
- fs.getContent()
11/25 What does NPM stand for?
- Node Package Manager
- Network Protocol Module
- New Programming Methodology
12/25 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
13/25 Which Node.js module is used to work with file paths?
- fs
- path
- file
14/25 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
15/25 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
16/25 What is the purpose of the Node.js 'cluster' module?
- To enable load balancing over multiple CPU cores
- To manage a cluster of database connections
- To cluster data for machine learning tasks
- To synchronize the execution of multiple node instances
17/25 How can you access the query string parameters in an Express route?
- req.query
- req.params
- req.body
18/25 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
19/25 Which module is used to create a web server in Node.js?
- http
- server
- net
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 Which function is used to read data from a readable stream in Node.js?
- stream.read()
- stream.getData()
- stream.fetch()
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 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
24/25 Which Node.js method is used to execute a function after a specified number of milliseconds?
- setTimeout()
- nextTick()
- setInterval()
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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