NodeJS Interview Questions and Answers

NPM stands for Node Package Manager and is responsible for managing all the packages and modules for Node.js. Socket.on(“eventname”,callback) event is used for receiving messages. The dependencies field of the package.json file will have Software engineering all packages listed on which your node project is dependent. Package dependencies and development dependencies are both defined in the package.json file. The command used to load external libraries in Node.js is require().

Code Example: File I/O

By asking this question, interviewers aim to assess your knowledge of web servers and their significance in serving content to users. Node.js uses an event-driven, non-blocking I/O model that allows it to handle I/O operations more efficiently. By using callbacks, Node.js can continue processing other tasks while waiting for I/O operations to complete. This means that Node.js can handle multiple requests simultaneously without causing any delays. Additionally, Node.js uses a single-threaded event loop architecture, which allows it to handle a high volume of requests without any issues. One of the defining features of Node.js is its ability to handle I/O-bound tasks asynchronously.

Walk me through your process of starting a Node.js project.

ESLint tool is one junior node js developer of the best tools we can use with any IDE to ensure a consistent coding style. The I/O describes any program, operation, or device that transfers data to or from a medium or another medium. This medium can be a physical device, network, or files within a system.

Differentiate between Real DOM and virtual DOM?

You can compare candidates’ knowledge by looking at their easy-to-understand results and then quickly select top candidates for an interview. It also reduces your time-to-hire metrics because you won’t need to screen a single resume. Developers use the Connect module when handling various types of middleware, but you should listen for an answer that specifies a few ways the module is useful for developers.