Node.js Basics

What is Node.js?

• JavaScript runtime environment

• A programming language

• An operating system

• A database management system

Explain the concept of Node.js Modules.

• Node.js Modules are only used for front-end development.

• Node.js Modules cannot be shared between different projects.

• Node.js Modules are written in a language other than JavaScript.

• Node.js Modules are reusable pieces of code that encapsulate related functionality.

How can Node.js be used for server-side scripting?

• By using Python code on the server

• By executing C++ scripts on the server

• By running JavaScript code on the server

• By running HTML code on the server

What is the role of npm in Node.js?

• npm is responsible for routing in Node.js

• npm is used for styling in Node.js

• npm manages packages and dependencies in Node.js

• npm is used for database management in Node.js

Name a popular framework built on top of Node.js.

• Hapi

• Express

• Nest.js

• Node

What is the difference between synchronous and asynchronous programming in Node.js?

• Synchronous programming is only used for I/O operations in Node.js

• Synchronous programming allows for more efficient resource utilization than asynchronous programming

• Synchronous programming blocks further execution until the current operation is completed, while asynchronous programming allows multiple operations to be executed concurrently.

• Asynchronous programming always executes faster than synchronous programming

How can you handle errors in Node.js?

• Handle errors in Node.js by deleting the code causing the error

• Handle errors in Node.js by ignoring them

• Handle errors in Node.js by using console.log() statements

• Handle errors in Node.js using try-catch blocks, error-first callbacks, promises with .catch() method, or async/await with try-catch.

Explain the event-driven architecture of Node.js.

• Node.js uses a sequential execution model for handling events.

• Node.js follows an event-driven architecture using an event loop to handle asynchronous operations efficiently.

• Event-driven architecture in Node.js is based on multithreading.

• Node.js event loop processes events synchronously.