The DOM is a browser-specific API that allows for manipulating HTML and XML documents. Since Node.js does not run in a browser, it does not have access to the DOM. A web server using Node.js typically has a workflow that is quite similar to the diagram illustrated below.
Folders and files
- In Node.js, the fs module provides methods for working with the file system.
- Let’s look at how to create a simple server in Node.js using the built-in http module.
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- This Node interview questions and answers gives you an overview of what type of questions can be asked on Node.js in your interview.
Finally, you can write end-to-end tests that test the entire API, from the user interface to the database. First-class functions are a powerful feature of JavaScript that allows you to write more flexible and reusable code. In Node.js, first-class functions are used extensively in asynchronous programming to write non-blocking code. It allows other code to be run in the meantime and prevents any blocking. Node.js is an open-source, cross-platform JavaScript runtime environment and library to run web applications outside the client’s browser.
What is the purpose of package.json in a Node.js project?
The current version of HTML is HTML5, which is the fifth and latest version of HTML. It introduced several new elements, attributes, and behaviors, providing more powerful tools for web developers. On the other hand, I have also utilized NoSQL databases like MongoDB and Redis in projects that required more flexibility and scalability.
What are the three methods to avoid callback hell?
In other words, a promise is a JavaScript object which is used to handle all the asynchronous data operations. While developing an application you may encounter that you are using a lot of nested callback functions which causes a problem of callback hell. In this guide, we will provide 50+ Node.js Interview Questions and Answers tailored for freshers and experienced professionals with 3, 5, and 8 years of experience. Likewise, if you’re thinking about a career in Full Stack Development, the future is yours. The InterviewBit team has put together a list of 30+ full stack developer interview questions and answers that will help you prepare for this role.
- This can help to prevent eavesdropping and ensure that sensitive data is protected.
- In this article, we’ve compiled the Top 200+ Full Stack Developer Interview Questions and Answers – 2025, covering essential topics across frontend, backend, databases, and APIs.
- I use prepared statements when querying databases and employ libraries like OWASP’s ESAPI to sanitize user inputs.
- Middleware functions in Express.js are functions that have access to the request object (req), the response object (res), and the next middleware function in the application’s request-response cycle.
Database and Storage-Specific Web Developer Interview Questions with Answers
- Understanding the concept is very important not just for the interviews but also when we work for the projects.
- Operation errors are not bugs, but problems with the system, like request timeout or hardware failure.
- If too many requests are made beyond the defined limit, a 429 Too Many Attempts HTTP error is thrown.
- While clusters create multiple instances of a Node.js process, each running on a separate CPU core, worker threads provide a way to create multiple threads within a single process.
- Exports object in Node.js is used to export functions, objects, or values from a module and is returned as the value of the require() function when another module requires a module.
V8, unlike the other engines, is also utilized for the popular Node.js runtime. V8 was initially intended to improve the speed of JavaScript execution within web browsers. Instead of employing an interpreter, JavaScript Full-stack developer (Node.jsReact.js) job V8 converts JavaScript code into more efficient machine code to increase performance.
Key Modules
This makes ObjectId useful for tracking record creation time and ensuring distributed uniqueness. Check out this Resume Example Node JS Developer for tips and tricks on how to build an outstanding resume and secure your dream job in 2025. Explore this Senior Front End Developer Resume Example 2025, with tips and template to help you craft an effective resume for your next job search. Reveals the candidate’s ability to keep their Node.js knowledge current in order to apply it in practice. Dive deep into every conversation, free from the distraction of note-taking.
Using this deployment strategy, old versions of an application are completely replaced with the new versions by completely replacing the infrastructure on which they run. By asking this question, the hiring manager will get an idea of the type and complexity of past projects you have completed. You should clearly state the problems you encountered and the steps you took to overcome them. In addition, you can talk about the lessons you learned from the issue. We offer coherent solutions in skill development and building your brand presence online.
Event loop involves different phases with Software engineering specific tasks such as timers, pending callbacks, idle or prepare, poll, check, close callbacks with different FIFO queues. Also in between iterations it checks for async I/O or timers and shuts down cleanly if there aren’t any. This was to try a new theory of doing async processing on a single thread over the existing thread-based implementation of scaling via different frameworks.
Middleware is a critical component in web development, and interviewers want to ensure you have a solid understanding of its role. Middleware functions as a bridge between the front-end and back-end of a web application, facilitating communication, data processing, and workflow management. Demonstrating your knowledge of middleware showcases your ability to create seamless, efficient, and scalable web applications, which is essential for a Full Stack Developer. 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. Understanding your familiarity with different database management systems is essential for employers to assess your technical expertise and ability to work with complex data structures.