250+ Node Js MCQ With Online Practice Test

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Node.js, often referred to as simply "Node," is a powerful open-source runtime environment that allows developers to execute JavaScript code outside of web browsers. It is designed for building scalable and efficient network applications, particularly on the server side. Node.js leverages a non-blocking, event-driven architecture, making it ideal for handling asynchronous operations and real-time applications. With its vast ecosystem of packages and modules available through npm (Node Package Manager), Node.js has become a popular choice for web development, microservices, APIs, and more, enabling developers to create high-performance applications with ease.

231. In Node.js, what is the primary purpose of the "package.json" file?

Answer: To define the project's dependencies, scripts, and metadata

232. Which npm command is used to install project dependencies listed in the "package.json" file?

Answer: npm install

233. What is the purpose of the "node_modules" directory in a Node.js project?

Answer: To store third-party packages and libraries installed via npm

234. Which npm command is used to uninstall a package from a Node.js project?

Answer: npm uninstall

235. What is "Yarn" in the context of Node.js development?

Answer: A package manager for managing dependencies

236. Yarn was developed by which technology companies in collaboration with the open-source community?

Answer: Facebook, Google, and Microsoft

237. In Yarn, what is the purpose of the "yarn.lock" file?

Answer: To lock down the specific versions of dependencies to ensure consistency

238. Which Yarn command is used to install project dependencies based on the information in the "yarn.lock" file?

Answer: yarn install

239. What is an advantage of using Yarn over npm for package management in Node.js projects?

Answer: Yarn offers faster and more reliable dependency resolution and installation.

240. What is the primary purpose of a CLI tool developed using Node.js?

Answer: To interact with and control software or perform tasks through a text-based interface
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