Overall, Node JS is just one of the best tools on the market when it comes to server-side development based on JavaScript. Of all the basic questions about Node.JS, this is certainly the main one. Naturally, this is also often the Software engineering first or one of the first questions that you can ask in an interview.
How do you ensure a website or application is responsive across different devices?
Answers are also automatically cross-checked for plagiarism to eliminate any chance of an unfair advantage. These can be considered similar to the working of strings and array objects. Streams are used for continuous read/write operations across a channel.
How is Node.js better than other frameworks?
- When a developer is completely immersed in the work on Node.JS, they do not always think about what it is.
- The ability to understand client needs and convey technical concepts in an accessible way is a valuable skill.
- The best approach to applicant evaluation is to combine skills assessments that include a Node.js test with interviews in which you ask candidates Node.js interview questions.
- Node.js relies on non-blocking I/O operations to avoid blocking the event loop.
- The setImmediate function is used to execute a particular script immediately whereas the setTimeout function is used to hold a function and execute it after a specified period of time.
- This is achieved through the use of a sandboxed environment, which can help prevent malicious code from accessing sensitive data or causing any damage to the system.
Node.js is one of the most popular runtime environments in the world, known for its efficiency, scalability, and ability junior node js developer to handle asynchronous operations. It is built on Chrome’s V8 JavaScript engine for executing JavaScript code outside of a browser. It is extensively used by top companies such as LinkedIn, Netflix, Walmart, Uber, PayPal, NASA, and many more because of its robust features and performance. This mechanism allows Node.js to manage multiple asynchronous operations simultaneously, making it well-suited for handling concurrent requests in web applications and other I/O-intensive tasks. Callbacks play a significant role in handling asynchronous operations in Node.js. They are functions passed as arguments to asynchronous functions, and they get executed once the asynchronous operation is completed.
Question 14: What is an event-loop Node JS?
Furthermore, Node.js utilizes “Libuv” when accessing native modules like “fs” and “crypto”. Through “Libuv”, Node.js gets access to the multi-threading capabilities of the underlying operating system. If you want to hire a Node JS specialist, you will need to know what questions you can ask. If you study the questions and answers presented in this guide, you should get a pretty good idea of what you can expect from the candidate. They could be for read only operations (Readable), write (Writable), read and write (Duplex) and for update data (Transform). The candidate may also mention that callback hell can actually be resolved.
What is the difference between setTimeout() and setImmediate() method?
- Candidates who can talk about these features are worth considering for your organization.
- Ans – Use JSON.parse() to convert JSON strings into JavaScript objects and JSON.stringify() to convert objects into JSON strings.
- If you’re preparing for a web development job interview, you need more than just technical knowledge.
- Runtime errors occur when a program is executing and an unexpected error occurs.
- The event-based model allows for non-blocking I/O operations, which means that Node.js can handle a large number of connections without using a lot of resources.
- It’s behind JavaScript’s asynchronous programming and it performs tasks on a single thread, but as it applies few data structures it looks like multi-threading.
It offers a simple method for programmers to implement user authentication in Node.js apps. On the other hand, Node.js is a popular runtime environment for real-time application creation – many companies regularly use this server environment. Candidates should mention that developers link a function to an event. The system then executes the function when the user triggers the event.