Niit Technologies Node Js Gurgaon Interview Questions
NIIT Technologies Node.js Developer Interview Questions: Gurgaon
Niit Technologies Node Js Gurgaon Interview Questions
NIIT Technologies Node.js interview questions in Gurgaon are designed to assess candidates' understanding of Node.js concepts and their ability to apply them in real-world projects. They cover topics such as Node.js architecture, modules, event loops, asynchronous programming, and best practices. These questions are useful for candidates as they provide insights into industry expectations and help them showcase their skills and knowledge.
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1 - What is Node.js?
A JavaScript runtime environment for server side development
2) What is the difference between synchronous and asynchronous code in Node.js?
Synchronous code executes line by line, while asynchronous code allows other operations to occur while waiting for I/O operations to complete.
3) What are the benefits of using Node.js?
High performance, concurrency, and event driven architecture.
4) What are the different types of modules in Node.js?
Core modules, third party modules, and local modules.
5) What is the difference between GET and POST requests?
GET requests retrieve data from a server, while POST requests submit data to a server.
6) How do you handle errors in Node.js?
Using the ‘try…catch’ block or the ‘error first callback’ pattern.
7) What is the purpose of the ‘package.json’ file?
It contains metadata about the Node.js project, including project name, dependencies, and scripts.
8) How can you improve the performance of a Node.js application?
Using caching, optimizing database queries, and minimizing memory leaks.
9) What are the best practices for writing Node.js code?
Use good coding patterns, follow naming conventions, and handle errors properly.
10) How do you test Node.js applications?
Using unit testing frameworks like Mocha and Jest.
11 - What are the security considerations when developing Node.js applications?
Preventing SQL injections, cross site scripting (XSS), and data breaches.
12) What is the role of Express.js in Node.js?
It's a web framework that simplifies routing, middleware handling, and HTTP request handling.
13) How do you handle authentication and authorization in Node.js?
Using middleware like Passport.js or JWTs for user authentication and role based authorization.
14) What is the difference between front end and back end development in Node.js?
Front end development deals with the client side (user interface), while back end development handles the server side (data processing and storage).
15) What are the career opportunities for Node.js developers?
Opportunities in software development, web development, and data science.
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Functional Tools
Tools Used in Course ‘NIIT Technologies Node.js Gurgaon Interview Questions’:
- Node.js: A JavaScript runtime environment used for developing server side applications.
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