This was said back in 2007, and we can say that it is proving true till now. You can think of any technical keyword and there might be a JavaScript library build around it. So if it’s so popular and in demand, this can be a great programming language to learn. But that’s not the only skill that is required, since you have to apply this to solve practical problems. The child process module allows you to spawn new child processes, execute commands in a shell, and communicate with child processes using IPC (Inter-Process Communication) channels. Usually, the code runs from the first line to the last line unless the structures (loops and conditions) changes the control flow.

What is a promise and explain its states?

It provides automated recovery and Software development lets you control and watch over your Node.js apps. Existing resources are updated using the PUT method, while new resources are created using the POST method. In Node.js, a callback function is a function that receives input from another function and is called once that function has finished its job. This question evaluates your architectural thinking and business awareness. Technology choices impact development speed, maintenance costs, scalability, and team productivity, making them critical business decisions. Connect these concepts to business outcomes like broader user reach, better SEO, and legal compliance.

How do you perform unit testing in Node.js applications?

As a full stack developer, your work will be viewed and interacted with by users on JavaScript Full-stack developer (Node.jsReact.js) job a variety of browsers, devices, and operating systems. Ensuring that your applications and websites are functional and visually consistent across these platforms is essential for a seamless user experience. By asking about the tools you use for cross-browser compatibility testing, interviewers want to gauge your awareness of this aspect of development and your ability to address potential issues effectively.

Based on your skills

• The child process module allows you to spawn child processes in Node.js.
• The Timers module is global, we do not need to use require() to import it.
• It allows clients (like web browsers or mobile apps) to interact with servers to perform operations like fetching or modifying data.
• After compilation, JSX expressions are transformed into standard JavaScript objects.
• The Virtual DOM in React is an in-memory representation of the actual DOM.

They always need to stay updated and learn new technologies to make themselves stand out from the crowd. A full-stack developer is a professional specializing in both the front-end as well as back-end. They can develop both the client-side and server-side of software applications. They are versatile and all-rounders who have strong knowledge of all technologies involved in the development of complete web applications. Therefore, when an async function (or an I/O) needs to be executed, the main thread relays it to another thread, allowing v8 (Javascript engine) to continue processing or running its code. In the event loop, there are different phases, like pending callbacks, closing callbacks, timers, idle or preparing, polling, and checking, with different FIFO (First-In-First-Out) queues.

Reporting & BI Tools

Firstly let’s discuss some entry-level questions that you can expect during an interview, these questions are pretty easy and can be answered if you have even basic knowledge of the topics. This blog post is divided into three sections covering all the concepts of Full Stack Development interview questions that you are expected to face while sitting in the hot seat. Full Stack Development is one of the most popular domains in computer science where complete web applications inclusive of front-end, back-end, and databases are developed. Currently, there are over 45,000 job offers worldwide, offering Full Stack Developers positions are becoming more and more popular.

What is the purpose of the ‘require’ keyword in NodeJS?

A senior Node.js developer should have experience in front-end design and development using HTML and CSS. And a senior Node.js developer must know all crucial JavaScript concepts, have error-handling skills, and need to have RESTful APIs and API communications skills. With every application created, it will require unique authentication mechanisms. This is provided as single modules by using a passport, and it becomes easy to assign strategies to applications based on requirements, thereby avoiding any sort of dependencies. The working of an event loop begins with the occurrence of a callback wherever an event begins. Node.js will keep executing the code after the functions have been called, without expecting the output prior to the beginning.

How would you monitor a Node.js application in production?

Additionally, Node.js uses a single-threaded event loop architecture, which allows it to handle a high volume of requests without any issues. Hiring managers want to ensure that you, as a full-stack developer, possess a strong understanding of testing methodologies and can apply them effectively to create a reliable and robust software product. As a full stack developer, you are expected to have a comprehensive understanding of both front-end and back-end technologies, and state management in single-page applications is a key concept. CORS, or Cross-Origin Resource Sharing, is a security feature implemented in web browsers that controls how web applications interact with resources from different origins. Additionally, it showcases the developer’s knowledge of frontend and backend interactions, as well as their ability to implement proper security measures.

The Fork method in Node.js creates a new child process that runs a separate Node.js instance and can be useful for running CPU-intensive tasks or creating a cluster of Node.js servers. In the last section, we will now cover some of the advanced-level Node.js interview questions. This prevents any blocking and enables other code to run in the meantime. It is the foundation of Node.js’s non-blocking input/output in Node.js, making it one of the most important environmental features.

GraphQL is a query language for APIs that allows clients to request exactly the data they need, reducing over-fetching or under-fetching. Memory leaks usually happen when unused resources (e.g., DOM elements, event listeners, or data structures) are not properly released, causing unnecessary memory consumption. Finally, it ensures reproducible installations by allowing the npm install command to pull consistent dependencies, ensuring you can easily port your project into other systems. The main loop is single-threaded and all async calls are managed by libuv library. ESLint can be used with any IDE to ensure a consistent coding style which further helps in maintaining the codebase.