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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 Which of the following is a core module in Node.js?
- Express
- fs
- Bootstrap
3/25 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
4/25 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
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 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 Which Node.js module is used to work with file paths?
- fs
- path
- file
8/25 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
9/25 In Node.js, which method is used to spawn a child process?
- process.spawn()
- child_process.spawn()
- system.spawnProcess()
10/25 What is the use of the 'express' package in Node.js?
- Data encryption
- Web application framework
- File compression
11/25 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
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 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
14/25 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
15/25 Which of the following are valid HTTP methods supported by the HTTP module in Node.js?
- GET
- SEND
- POST
- REMOVE
16/25 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
17/25 How can you access the query string parameters in an Express route?
- req.query
- req.params
- req.body
18/25 Which function is used to read data from a readable stream in Node.js?
- stream.read()
- stream.getData()
- stream.fetch()
19/25 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
20/25 In Node.js, which of the following is true about environment variables?
- They can store application configuration separately from code
- They are accessible through the 'process.env' object
- They can only be set within the application code
21/25 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
22/25 How can template literals be used in Node.js?
- For defining SQL queries
- To concatenate strings and variables
- To create HTML templates
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 What is the difference between 'exports' and 'module.exports' in Node.js?
- 'exports' is a shorthand for 'module.exports'
- 'exports' can export multiple objects, functions, or values
- 'module.exports' can only export a single object, function, or value
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