Why Should I Use Node.js?

This video tutorial explores the reasons for learning Node.js, its architecture, and its non-blocking I/O model. It compares blocking and non-blocking I/O with examples and demonstrates their execution. The tutorial also introduces the Node.js package ecosystem, NPM, highlighting its vast collection of open-source libraries.

Why is Node.js becoming a popular choice for backend development?

• It is in high demand and used by companies like Netflix and Uber.

• It is based on Python.

• It is only used for mobile app development.

• It is a front-end framework.

What is a key feature of Node.js's I/O model?

• Non-blocking I/O

• Blocking I/O

• Synchronous processing

• Single-threaded execution

What does non-blocking I/O allow a Node.js application to do?

• Process other code while waiting for I/O

• Use multiple threads for I/O

• Run only one operation at a time

• Freeze during I/O operations

In the blocking I/O example, what happens while waiting for the database response?

• The application switches to another thread.

• The application crashes.

• The application waits and does nothing else.

• The application continues processing other tasks.

How does the non-blocking I/O example improve performance?

• By using more memory

• By overlapping I/O operations and other tasks

• By reducing the number of operations

• By using a different programming language

What is the main advantage of using non-blocking I/O in server-side development?

• It allows for single-user processing.

• It enables multiple requests to be processed simultaneously.

• It simplifies code structure.

• It increases the number of required servers.

What is NPM in the context of Node.js?

• A programming language

• A database management system

• A front-end framework

• A package ecosystem for open-source libraries

What can developers find on npmjs.com?

• Design templates for web applications

• Source code for Node.js

• Pre-written packages for various functionalities

• Only Node.js documentation

How does NPM benefit Node.js developers?

• By providing a platform for mobile app development

• By offering a large collection of reusable packages

• By offering cloud storage solutions

• By simplifying front-end design

What is a common use of NPM packages in Node.js applications?

• To validate and send emails

• To design user interfaces

• To create mobile apps

• To manage server hardware