Interview Questions of Node JS
Node.js Interview Questions and Answers
Interview Questions of Node JS
Interview questions for Node.js assess a candidate's knowledge and skills in using Node.js for server-side development. These questions delve into topics such as its event-driven architecture, non-blocking I/O, and popular frameworks, providing insights into the candidate's understanding of Node.js's fundamental concepts and its practical applications in building scalable and efficient web applications. By evaluating this knowledge, interviewers can gauge the candidate's ability to design and implement Node.js-based solutions and ensure their suitability for roles involving Node.js development.
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1 - What is Node.js?
Node.js is a JavaScript runtime environment that executes code on the server side, outside of a web browser.
2) What are the advantages of Node.js?
Event driven and non blocking architecture
Fast and scalable
Supports a wide range of modules
3) What is the event loop in Node.js?
The event loop is the core of Node.js. It listens for events and executes callbacks when those events occur.
4) What is a module in Node.js?
A module is a reusable piece of code that can be imported into other modules or applications.
5) What is Express.js?
Express.js is a popular web framework for Node.js that simplifies the process of building web applications.
6) What is MongoDB?
MongoDB is a popular NoSQL database that is used with Node.js applications.
7) What is RESTful API?
RESTful API is a set of architectural principles for designing web APIs.
8) What is asynchronous programming?
Asynchronous programming allows code to run without blocking the main thread.
9) What is a callback function?
A callback function is a function that is passed as an argument to another function and is executed when the second function completes.
10) What is Promise?
A Promise is an object that represents a value that may or may not be available yet.
11 - What is a Stream?
A Stream is a sequence of data that can be read from or written to.
12) What is HTTP?
HTTP (Hypertext Transfer Protocol) is a protocol for transferring data over the web.
13) What is HTTPS?
HTTPS (Hypertext Transfer Protocol Secure) is a secure version of HTTP that uses encryption to protect data in transit.
14) What is Socket.io?
Socket.io is a library for real time websockets in Node.js.
15) What is Next.js?
Next.js is a React framework for building isomorphic and server rendered web applications.
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- Course Overview
- “Interview Questions of Node.js” is a comprehensive course that equips software engineers with the knowledge and skills necessary to excel in Node.js interviews.
- Course Description
- Master the art of interviewing for Node.js engineering roles. This course covers all aspects of the interview process, from behavioral and technical questions to salary negotiation.
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Functional Tools
1 - Node.js CLI (Command Line Interface):
Allows users to run Node.js scripts and interact with the Node.js environment from the command line.
Provides commands for managing packages, starting the Node.js runtime, and debugging code.
2) Node Package Manager (NPM):
A package manager for Node.js that allows users to install, update, and manage third party Node.js modules.
Provides a command line interface for searching, installing, and managing packages.
3) Node.js Debugger:
An inspect mode that allows developers to inspect and debug Node.js code during execution.
Can be accessed through the ‘ inspect’ flag when starting the Node.js process.
4) Source Code Editors (e.g., Visual Studio Code, Atom):
Provide syntax highlighting, auto completion, and debugging tools for Node.js development.
Allow developers to edit, navigate, and debug their Node.js code efficiently.
5) Testing Frameworks (e.g., Mocha, Chai, Jest):
Provide tools for writing unit tests and integration tests for Node.js applications.
Help ensure the reliability and correctness of the codebase.
6) Docker for Node.js:
Enables developers to package and deploy Node.js applications in lightweight and portable containers.
Simplifies deployment processes and allows for consistent development environments.
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