Node js Tutorial Learn NodeJS

This approach allows multiple tasks to run concurrently without halting the application’s progress. Node.js environment is event-driven and provides non-blocking I/O, that optimizes throughput and scalability in web applications. The OpenJS Foundation, facilitated by the Linux Foundation’s Collaborative Projects program, now handles the Node.js distributed development. The following code is an example of a simple JavaScript file (server_tst.js) written for the Node environment.

Speed and Performance:

The crypto module is used for encrypting, decrypting, or hashing any type of data. This encryption and decryption basically help to secure and add a layer of authentication to the data. The main use case of the crypto module is to convert the plain readable text to an encrypted format and decrypt it when required. The Buffer class in Node.js is used to perform operations on raw binary data. Generally, Buffer refers to the junior node js developer particular memory location in memory.

How do you install, update, and delete a dependency?

• Let me explain what it means what event-driven means in Node JS.
• Here, we explore the key features that make Node.js a powerful tool for server-side development.
• To implement the concept of the system to handle the request  node.js uses the concept of Libuv.
• It returns the current timestamp in milliseconds, which can be used to calculate the duration of a task.
• You can then use the async keyword to mark a function as asynchronous and the await keyword to wait for a promise to resolve before continuing with the rest of the code.
• All in all, Node.js empowers developers to create innovative and scalable web applications.

Check out these alternative Node.js projects that are still in making. If you’ve read our previous post about top companies using Node.js, you already know about Netflix, Microsoft, Uber and more. Capital One, a huge financial corporation, runs numerous projects with Node.js because of short Node.js development cycles.

What is the difference between fork() and spawn() methods in Node.js?

Additionally, Node.js uses a single-threaded event loop architecture, which allows it to handle a high volume of requests without any issues. NodeJS is a powerful runtime environment that extends JavaScript beyond the browser, enabling fast, scalable, and non-blocking server-side applications. With its event-driven architecture, V8 engine, and rich NPM ecosystem, it is widely used for web development, APIs, real-time applications, and microservices. While it excels in handling I/O-intensive tasks, it may not be ideal for CPU-heavy computations. Asynchronous tasks that should occur in an event loop in Node.js include I/O operations, timers, and callback functions. By performing these tasks asynchronously, Node.js can handle a large number of concurrent requests without blocking the event loop.

What’s the difference between ‘front-end’ and ‘back-end’ development?

• This Node interview questions and answers gives you an overview of what type of questions can be asked on Node.js in your interview.
• So if the read-file process finishes first, it will print the file contents.
• One of the advantages of Node.js is that it allows you to work on both the front-end and back-end of your application.
• The moment we get the response from the other server or database it will execute a callback function.
• This causes the code to look like a pyramid and makes it unable to read To overcome this situation we use promises.
• Node.js is one of the most popular runtime environments in the world, known for its efficiency, scalability, and ability to handle asynchronous operations.

Like this one, where Adam Geitgey, director of software engineering at Groupon, talks about how the platform helped them to expand. With almost 4 million users by early 2017, Node.js surely does not software quality assurance (QA) analyst lack top-level companies that work with it. For instance, what was our previous reference to NASA all about? The agency in partnership with UTC Aerospace Systems has designed end-to-end system for live data processing. It is used in astronauts’ spacesuits and has been build with Node.js.