NodeJS Intro Quiz

To pass the quiz, you must correctly answer at least 9 of the 10 questions below. # --quizzes-- ## --quiz-- ### --question-- #### --text-- Why does client-side JavaScript have restricted access to the local file system? #### --distractors-- Because JavaScript is a slow programming language. --- Because browsers do not have enough memory to handle files. --- Because the DOM API prevents file access. #### --answer-- Because it was designed to run in web browsers where unrestricted file access would pose security risks. ### --question-- #### --text-- What does it mean that Node.js is "cross-platform"? #### --distractors-- It can run multiple programming languages simultaneously. --- It can connect different databases together. --- It requires different installation methods for each operating system. #### --answer-- It works on any operating system, including Windows, macOS, and Linux. ### --question-- #### --text-- Which API is accessible in the browser environment but NOT in the Node.js environment? #### --distractors-- The File System API --- The Networking API --- The Operating System API #### --answer-- The DOM API ### --question-- #### --text-- What is `npm` in the context of Node.js? #### --distractors-- A JavaScript framework for building user interfaces. --- A web browser optimized for Node.js applications. --- A debugging tool for Node.js applications. #### --answer-- A package manager for Node.js that allows you to install and manage packages and modules. ### --question-- #### --text-- What does the `--lts` flag indicate when running `nvm install --lts`? #### --distractors-- It installs the latest testing snapshot version. --- It installs the lightest and smallest version available. --- It installs the version with the most features. #### --answer-- It installs the Long-Term Support version that prioritizes stability, reliability, and security. ### --question-- #### --text-- What is a "callback" in the context of asynchronous programming in Node.js? #### --distractors-- A method that restarts a failed operation. --- A variable that stores the result of synchronous operations. --- A tool that monitors application performance. #### --answer-- A function that defines what happens when asynchronous operations are completed. ### --question-- #### --text-- What is the purpose of the `package.json` file created by `npm init`? #### --distractors-- To store environment variables for the application. --- To configure the web server settings. --- To define the HTML structure of the application. #### --answer-- To track the project's details and dependencies. ### --question-- #### --text-- Why might CPU-intensive tasks be problematic in Node.js? #### --distractors-- Node.js cannot perform mathematical operations. --- Node.js does not support cryptography or image processing. --- The event loop prevents CPU operations from running. #### --answer-- They may block the main thread since Node.js runs on a single thread, resulting in performance issues. ### --question-- #### --text-- What command would you use to run a JavaScript file named `server.js` using Node.js? #### --distractors-- `npm run server.js` --- `nvm execute server.js` --- `javascript server.js` #### --answer-- `node server.js` ### --question-- #### --text-- What should developers check before choosing packages from npm? #### --distractors-- Whether the package has at least 1000 downloads. --- Whether the package was created recently. --- Whether the package requires payment. #### --answer-- Whether the package is maintained and follows quality and security best practices.