Backend Development with Node.js

False (B)

Backend development

<p>Node Package Manager</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Designing the layout of web pages (D)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>To import modules or libraries into a Node.js application</p> Signup and view all the answers

<p>Event loop = Manages asynchronous operations NPM = Package manager for Node.js Express.js = Framework for backend development Process object = Provides information about the current Node.js process</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Event-driven programming (A)</p> Signup and view all the answers

<p>Executes code after a specified delay</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>const pi = 3.14; (B)</p> Signup and view all the answers

<p>data type</p> Signup and view all the answers

<p>To make variables accessible everywhere (D)</p> Signup and view all the answers

<p>=== (triple equals) (A)</p> Signup and view all the answers

<p>Converts a string to an integer</p> Signup and view all the answers

<p>let = Block-scoped variable var = Function-scoped variable switch = Conditional branching const = Immutable variable</p> Signup and view all the answers

The primary role of backend development is to handle server-side logic and interact with databases. This ensures the smooth functioning of applications by managing data, processing requests, and controlling user interactions.

Node.js employs an asynchronous programming model. This means it can handle multiple operations concurrently without waiting for each to finish, resulting in efficient use of resources.

Express.js is a popular backend framework used with Node.js to build web applications. It provides tools and features for routing, handling requests, and managing data.

NPM (Node Package Manager) is the package manager for Node.js. It allows developers to search, install, and manage libraries and dependencies, streamlining the development process.

The event loop in Node.js is responsible for handling events and executing callback functions when those events occur. It monitors events and triggers the appropriate code for each one.

Backend development does not involve designing the layout of web pages. This is the responsibility of frontend development, which focuses on the user interface and visual aspects.

JavaScript is the primary programming language used with Node.js, allowing you to execute JavaScript code outside of a web browser to build backend systems.

Node.js's non-blocking I/O model enables it to handle numerous concurrent requests efficiently. It doesn't block its execution while waiting for operations to complete, allowing it to process requests in a timely manner.

The 'require' function in Node.js allows you to bring code from external modules into your project. It imports modules and exposes their functions or objects for use within your application.

The 'process' object in Node.js provides information about the current Node.js process. It contains details like the environment, arguments, and memory usage.

Node.js is an open-source, cross-platform JavaScript runtime environment that allows developers to execute JavaScript code outside of a web browser. It is built on Chrome's V8 JavaScript engine and is known for its fast performance and asynchronous event-driven architecture.

The 'process' object in Node.js provides access to information and methods related to the current Node.js process. This includes details like the Node.js version, command-line arguments, environment variables, and functions for interacting with the operating system.

Event-driven programming is a programming paradigm where the flow of execution depends on events. When an event occurs, the program responds by executing a specific callback function associated with that event. Node.js is built on this model, which makes it efficient for handling asynchronous operations like network requests.

The 'setTimeout()' function in Node.js is used to execute a function after a specified delay. It takes two arguments: the function to execute and the delay time in milliseconds.

JavaScript is a dynamically typed language, which means that the type of a variable is determined at runtime based on the value assigned to it. You don't have to explicitly declare the type of a variable beforehand.

The 'const' keyword in JavaScript is used to declare constants. Once a variable is declared as a constant, its value cannot be changed later in the code.

Type coercion is the automatic or implicit conversion of values from one data type to another. In JavaScript, this often happens during comparisons or arithmetic operations when values of different types need to be combined.

The 'global' object in Node.js is a special object that is accessible from anywhere in the application. It represents the global scope and acts as a container for globally defined variables and functions.

The '===' operator in JavaScript is used for strict equality comparison. It checks if two values are equal in both value and type without any type conversions.

The 'parseInt()' function in JavaScript converts a string representation of a number into an integer. It takes the string as input and returns the integer value.