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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 How do you install a package using npm?
- npm install package-name
- npm get package-name
- install npm package-name
4/25 Which of the following allows you to run Node.js applications in a cluster to improve performance?
- Node Cluster Module
- Node Performance Worker
- Node Load Balancer
5/25 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
6/25 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
7/25 Which of the following is used to create a RESTful web service in Node.js?
- The http module
- The fs module
- The url module
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 Which of the following is NOT a valid stream in Node.js?
- ReadStream
- WriteStream
- QuickStream
10/25 What is the purpose of the package.json file in a Node.js application?
- To store configuration settings
- To define the application entry point
- To list dependencies and scripts
- To compile the application code
11/25 Which Node.js module is used to work with file paths?
- fs
- path
- file
12/25 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
13/25 How can you ensure that a function is executed after all callbacks have completed in Node.js?
- Using the async module's series method
- Using the Promise.all method
- By nesting callbacks
- Using the EventEmitter class
14/25 In Node.js, what is a middleware in the context of Express applications?
- A database management system
- Functions that have access to the request object, the response object, and the next middleware function
- A client-side JavaScript library
15/25 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
16/25 How can you access the query string parameters in an Express route?
- req.query
- req.params
- req.body
17/25 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
18/25 Which environment variable is commonly used to set the port for a Node.js web server?
- PORT
- SERVER_PORT
- HTTP_PORT
19/25 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
20/25 Which function is used to read data from a readable stream in Node.js?
- stream.read()
- stream.getData()
- stream.fetch()
21/25 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
22/25 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
23/25 Which Node.js method is used to execute a function after a specified number of milliseconds?
- setTimeout()
- nextTick()
- setInterval()
24/25 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
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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