Top 250 Web Development Interview Questions and Answers

Browsers use rendering engines to interpret HTML, CSS, and JavaScript to display web pages.

• Browsers use rendering engines to interpret HTML, CSS, and JavaScript.

• The rendering engine parses the HTML and creates a DOM tree.

• The rendering engine then applies CSS rules to the DOM tree to create a render tree.

• The render tree is then laid out to determine the position of each element on the page.

• Finally, the rendering engine paints the render tree on the screen.

• JavaScript can manipu...read more

MVC in Rails stands for Model-View-Controller, a design pattern that separates the application into three interconnected components.

• Model: Represents the data and business logic of the application

• View: Represents the user interface of the application

• Controller: Handles user input, interacts with the model, and updates the view

• Promotes code organization and separation of concerns

A web page HTML viewer is a tool or software that allows users to view the HTML code of a web page in a structured and readable format.

• Web page HTML viewer helps users to understand the structure and content of a web page by displaying the underlying HTML code.

• Users can use a web page HTML viewer to inspect elements, troubleshoot layout issues, and learn from existing web pages.

• Popular web browsers like Google Chrome, Firefox, and Safari have built-in developer tools that inc...read more

Automate a website when repetitive tasks need to be performed frequently and consistently.

• Automate when manual testing becomes time-consuming and inefficient

• Automate when the website has a large number of test cases that need to be executed regularly

• Automate when the website undergoes frequent changes and regression testing is required

• Automate when the website needs to be tested across multiple browsers and devices

Subjects are a type of Observable that can multicast to multiple Observers.

• Subjects act as both an Observable and an Observer

• They can emit values to multiple subscribers

• There are four types of Subjects: BehaviorSubject, ReplaySubject, AsyncSubject, and Subject

• Subjects can be used for event handling, state management, and more

Create a website to search a movie catalog from file.

• Design a database schema to store movie information

• Create a web interface for users to search and browse movies

• Implement a search algorithm to retrieve movies based on user input

• Parse movie data from file and populate database

• Ensure website is responsive and user-friendly

React hooks provide a way to use state and other React features in functional components.

• Hooks allow for better code organization and reusability.

• They simplify complex state management and lifecycle methods.

• Examples include useState for managing state and useEffect for handling side effects.

• Hooks also enable custom hooks to be created for sharing logic between components.

Helpers in CodeIgniter are utility functions that assist in common tasks and can be used throughout the application.

• Helpers are standalone functions that can be loaded and used anywhere in the application.

• They provide a way to avoid writing repetitive code by providing ready-to-use functions.

• CodeIgniter comes with a set of built-in helpers, such as URL, Form, File, and Date helpers.

• Custom helpers can also be created to extend the functionality of the framework.

• Helpers are loa...read more

NodeJS is a server-side JavaScript runtime while ReactJS is a client-side JavaScript library.

• NodeJS runs on the server and executes JavaScript code outside of a web browser.

• ReactJS is a library for building user interfaces and runs on the client-side in a web browser.

• NodeJS uses an event-driven, non-blocking I/O model to handle requests efficiently.

• ReactJS uses a virtual DOM to efficiently update the UI based on changes in data.

• NodeJS and ReactJS can be used together to build...read more

Flask is a lightweight web application framework for Python.

• Create a virtual environment for your project

• Install Flask using pip

• Create a Flask app by defining routes and views

• Run the Flask app using the command 'flask run'

• Use Flask extensions for additional functionality

UI stands for User Interface and UX stands for User Experience.

• UI refers to the visual elements of a product or service that a user interacts with, such as buttons, menus, and icons.

• UX refers to the overall experience a user has while interacting with a product or service, including ease of use, accessibility, and satisfaction.

• Good UI and UX design can improve user engagement and retention, while poor design can lead to frustration and abandonment.

• Examples of good UI and UX d...read more

Express is a web application framework for Node.js. RESTful API is an architectural style for building web services.

• Express is a popular framework for building web applications using Node.js

• It provides a set of features for handling HTTP requests and responses

• RESTful API is an architectural style for building web services that use HTTP methods to perform CRUD operations

• It uses standard HTTP methods like GET, POST, PUT, DELETE to interact with resources

• RESTful APIs are statele...read more

Event bubbling is the process of propagating an event from the innermost element to its parent elements in the DOM hierarchy.

• Events in JavaScript are triggered on elements and then propagate up the DOM tree.

• During event bubbling, an event triggered on a child element will also trigger on its parent elements.

• This allows for event delegation, where a single event handler can be used for multiple elements.

• Event.stopPropagation() can be used to stop the event from further propaga...read more

Web technologies refer to the tools and techniques used to create, manage, and deliver web-based applications and services.

• Web technologies include programming languages like HTML, CSS, JavaScript, and server-side languages like PHP, ASP.NET, and Java.

• Web technologies also include frameworks and libraries like React, Angular, and jQuery.

• Web technologies are used to create websites, web applications, and web services that can be accessed through the internet.

• Web technologies a...read more

The structure of a website refers to the organization and layout of its content, pages, and navigation.

• A website typically consists of multiple pages interconnected through hyperlinks.

• The structure is often represented using HTML tags like

  ,

• Navigation menus or sidebars help users navigate between different sections or pages.

• Content is organized hierarchically, with headings, subheadings, and paragraphs.

• Elements like images, videos, forms, and interactive components...read more

Use a script to iterate through each HTML page, locate phone numbers, and update their format.

• Write a script using a programming language like Python or JavaScript to iterate through each HTML page

• Use regular expressions to locate phone numbers in the pages

• Update the format of the phone numbers as needed (e.g. adding country code, changing separators)

• Save the updated HTML pages with the new phone number format

To populate manager using server-side code, you can query the user table and retrieve the manager's details based on the user's ID.

• Use GlideRecord to query the user table

• Retrieve the manager's details using the user's ID

• Set the manager field with the retrieved manager's details

Firebase offers a variety of features for mobile and web app development.

• Realtime Database

• Authentication

• Cloud Firestore

• Cloud Storage

• Cloud Functions

• Hosting

• Crashlytics

• Performance Monitoring

• Remote Config

• Dynamic Links

Magento is an open-source e-commerce platform written in PHP. GraphQL is a query language for APIs.

• Magento is used for building online stores and managing products, orders, and payments.

• GraphQL is used for querying data from APIs in a flexible and efficient way.

• Magento supports GraphQL out of the box, allowing developers to easily retrieve data from the platform.

• GraphQL queries can be used to retrieve specific data fields, reducing the amount of data transferred over the netw...read more

Bankend uses various technologies to connect.

• Bankend uses secure network connections to connect with various systems and devices.

• Common technologies used at bankend include VPN (Virtual Private Network), MPLS (Multiprotocol Label Switching), and leased lines.

• Bankend also utilizes protocols like TCP/IP, HTTP, and HTTPS for communication.

• Firewalls and encryption techniques are employed to ensure data security.

• Bankend may also use APIs (Application Programming Interfaces) to con...read more

Full stack refers to the development of both front-end and back-end portions of a web application.

• Full stack developers are proficient in both front-end and back-end technologies

• They can handle databases, servers, systems engineering, and clients

• Examples of full stack technologies include HTML, CSS, JavaScript, Node.js, React, and Angular

Vue.js has several hooks that allow developers to execute code at specific points in the component's lifecycle.

• beforeCreate

• created

• beforeMount

• mounted

• beforeUpdate

• updated

• beforeDestroy

• destroyed

Firebase is a mobile and web application development platform that provides backend services and tools.

• Firebase is a Backend-as-a-Service (BaaS) platform

• It offers various services like authentication, real-time database, cloud storage, and hosting

• Firebase can be used to build and scale apps quickly

• It provides SDKs for different platforms including Flutter

• Firebase can be integrated into Flutter apps using the firebase_core and firebase_auth packages

• Example: Firebase can be use...read more

Components in Angular can communicate with each other using @Input, @Output, and services.

• Use @Input to pass data from parent to child component

• Use @Output to emit events from child to parent component

• Use services to share data between components that are not directly related

• Use RxJS subjects to create a shared data stream between components

HTTP status codes indicate the outcome of a HTTP request. They are categorized into 5 classes.

• 1xx: Informational - Request received, continuing process

• 2xx: Success - Request successfully received, understood, and accepted

• 3xx: Redirection - Further action needed to complete the request

• 4xx: Client Error - Request contains bad syntax or cannot be fulfilled

• 5xx: Server Error - Server failed to fulfill a valid request

React Native bridge is a communication layer between JavaScript code and native code.

• It allows React Native to interact with native modules written in Objective-C, Java, or Swift.

• The bridge sends messages between the two environments, allowing for seamless integration.

• The bridge can also be used to pass data between the two environments.

• For example, a React Native app might use the bridge to access the device's camera or accelerometer.

• The bridge can be a performance bottlenec...read more

In LWC, == is used for loose equality comparison while ==== is used for strict equality comparison.

• == is used for comparing values without considering data types

• === is used for comparing values while also considering data types

• Example: '1' == 1 will return true, but '1' === 1 will return false

Web application is a complete software program accessed through a web browser, while web API application is a set of programming instructions that allow communication between different software systems.

• Web application is a complete software program accessed through a web browser

• Web API application is a set of programming instructions that allow communication between different software systems

• Web application provides a user interface for the end-user to interact with the softw...read more

robots.txt is a file that tells search engine crawlers which pages or files to crawl or not crawl on a website.

• robots.txt is a text file placed in the root directory of a website.

• It uses a specific syntax to specify the directives for search engine crawlers.

• It helps in controlling the indexing and crawling of web pages.

• By disallowing certain pages or directories, it can prevent duplicate content issues.

• It can also be used to block sensitive or private information from being i...read more

Content management involves organizing, storing, and publishing digital content.

• It includes creating and editing content

• It involves managing workflows and permissions

• Examples include WordPress, Drupal, and SharePoint

A single page application is a web application that loads once and dynamically updates the content without refreshing the page.

• Loads once and dynamically updates content

• No page refreshes

• Uses JavaScript frameworks like React to handle routing and rendering

• Improves user experience by providing a seamless and responsive interface

JSX is a syntax extension for JavaScript that allows you to write HTML-like code in your JavaScript files.

• JSX stands for JavaScript XML

• It is commonly used with React to define the structure and appearance of components

• JSX elements are transpiled into regular JavaScript function calls

• It allows you to write HTML-like code with JavaScript expressions embedded within curly braces

• Example:

  Hello, {name}!

Pagination is handled by dividing data into smaller chunks and loading them as needed.

• Divide data into smaller chunks

• Load data as needed

• Use APIs like UITableView and UICollectionView

• Implement infinite scrolling

• Use page numbers or cursor-based pagination

I will check the response code and response message to ensure the request is being sent successfully.

• Check the response code, it should be in the 2xx range for success

• Check the response message for any error messages or exceptions

• Verify the data in the response matches the data sent in the request

A backend server is a server-side component that handles the logic and data processing for an application or website.

• Backend servers handle requests from client devices and perform tasks such as data storage, retrieval, and manipulation.

• They often communicate with databases, APIs, and other external services.

• Backend servers are responsible for processing and validating user input, performing business logic, and generating responses.

• Examples of backend server technologies incl...read more

The <img> tag is used for images in HTML.

• Use the <img> tag to display an image on a webpage

• Include the image source using the src attribute

• Add alternative text for accessibility using the alt attribute

Web browsers are software applications that allow users to access and view web pages, while search engines are websites that help users find information on the internet.

• Web browsers display web pages and allow users to navigate through them using hyperlinks

• Search engines provide a search bar where users can enter keywords to find relevant web pages

• Examples of web browsers include Google Chrome, Mozilla Firefox, and Microsoft Edge

• Examples of search engines include Google, Bing...read more

HTML is a markup language used for creating web pages. Python is a high-level programming language known for its simplicity and readability.

• HTML stands for HyperText Markup Language and is used to create the structure of web pages.

• Python is a versatile programming language known for its clean syntax and ease of use.

• HTML uses tags to define elements on a web page, such as headings, paragraphs, and images.

• Python is often used for web development, data analysis, artificial intel...read more

Spring Boot is a framework that simplifies the development of Java applications by providing pre-configured templates and components.

• Spring Boot provides a set of pre-configured templates and components that can be used to quickly develop Java applications.

• It includes features like auto-configuration, embedded servers, and production-ready metrics.

• Spring Boot also integrates with other Spring frameworks like Spring Data and Spring Security.

• Some of the key components of Spring...read more

Trading technology on the web refers to the use of software and systems to facilitate online trading activities.

• Trading technology on the web enables individuals and organizations to buy and sell financial instruments online.

• It includes platforms, tools, and algorithms that provide real-time market data, order execution, and portfolio management.

• Examples of trading technology on the web include online brokerage platforms like Robinhood, E*TRADE, and TD Ameritrade.

• It also enco...read more

Flow of Redux and code for promises

• Redux flow involves dispatching actions, reducers updating state, and components subscribing to state changes

• Promises are used for asynchronous operations and have a resolve and reject function

• Example code for promises: new Promise((resolve, reject) => { // code here })

To manage a payment gateway failure, identify the issue, communicate with the payment gateway provider, and implement a backup plan.

• Identify the issue causing the failure

• Communicate with the payment gateway provider to resolve the issue

• Implement a backup plan to ensure transactions can still be processed

• Monitor the situation to ensure the issue is fully resolved

Data binding is the process of connecting data between the model and view in a web application.

• It allows for automatic updates to the view when the model changes and vice versa.

• There are two-way and one-way data binding.

• Examples include AngularJS's ng-model directive and React's state and props system.

Creating a table in HTML

• Use the <table> tag to start the table

• Use <tr> tags to define rows

• Use <td> tags to define cells within rows

SSL certification can be configured with Tomcat by generating a keystore file and configuring the server.xml file.

• Generate a keystore file using keytool command

• Configure the server.xml file to include the keystore file and password

• Update the connector element in server.xml to include the SSL protocol and port number

• Restart Tomcat to apply the changes

ASP stands for Average Selling Price.

• ASP is the average price at which a product or service is sold.

• It is calculated by dividing the total revenue by the number of units sold.

• ASP is an important metric for sales managers to track and analyze.

• It helps in understanding pricing trends, setting sales targets, and evaluating performance.

• For example, if a company sells 100 units of a product and generates $10,000 in revenue, the ASP would be $100.

A browser is a software application used to access and view websites on the internet.

• A browser is a program that retrieves and displays web pages.

• It interprets HTML code and renders it as a visual representation.

• Browsers allow users to navigate through websites and interact with web content.

• Examples of browsers include Google Chrome, Mozilla Firefox, Safari, and Microsoft Edge.

To create an external tab link, use HTML anchor tag with target attribute set to _blank.

• Use <a> tag in HTML with href attribute pointing to the external link

• Set the target attribute of the <a> tag to _blank to open the link in a new tab

• Example: <a href='https://www.example.com' target='_blank'>External Link</a>

Semantic elements in HTML are tags that clearly define the content they wrap, providing meaning to both browsers and developers.

• Semantic elements help improve SEO by providing search engines with better understanding of the content.

• Examples of semantic elements include <header>, <footer>, <article>, <section>, <nav>, <aside>, <main>, <figure>, <figcaption>, <details>, <summary>, <time>, <mark>, <meter>, <progress>, <output>.

• Using semantic elements also improves accessibility ...read more

HTML5 is the latest version of the HTML standard, introducing new features for web development.

• Introduction of new semantic elements like <header>, <footer>, <nav>, <article>, <section>, <aside>

• Support for audio and video elements without the need for plugins

• Canvas element for drawing graphics on the fly

• Local storage capabilities for storing data on the client side

• Improved form elements like date pickers, email validation, and placeholder text

Sessions refer to a period of time during which a user interacts with a product or service.

• Sessions can be used to track user behavior and engagement.

• They can be measured by the amount of time a user spends on a website or app.

• Sessions can also refer to a group of related tasks or activities that are completed in a single sitting.

• In product development, sessions can be used to analyze user feedback and make improvements to the product.

• Examples of session-based products includ...read more

Asort is a social commerce platform that connects sellers and buyers through a community-driven approach.

• Asort is a platform that allows sellers to showcase their products and buyers to purchase them.

• It is a community-driven platform that encourages sellers to build their own network of buyers.

• Asort offers various tools and resources to help sellers grow their business and increase their sales.

• Buyers can discover new products and connect with sellers through the platform.

• Asor...read more

Redux Toolkit is an official, opinionated, batteries-included toolset for efficient Redux development.

• Official toolset for Redux

• Opinionated and batteries-included

• Helps with common Redux tasks like store setup, reducer logic, and actions

To create HTML code in Visual Studio, you can simply create a new HTML file and start writing your code.

• Open Visual Studio and create a new HTML file

• Start writing your HTML code within the file

• Use the HTML tags and attributes to structure your content

• Save the file with a .html extension

• Preview your HTML code in a web browser

Forms may take time to load due to various reasons.

• Network latency

• Heavy database queries

• Large number of concurrent users

• Inefficient coding

• Insufficient hardware resources

Header tags are HTML elements used to define headings and subheadings on a webpage.

• Header tags range from <h1> to <h6>, with <h1> being the most important and <h6> the least important.

• They help search engines understand the structure and hierarchy of content on a webpage.

• Header tags also improve accessibility for users by providing clear organization and navigation.

• Example: <h1>This is a main heading</h1>, <h2>This is a subheading</h2>

A header is a piece of information at the beginning of a data packet or file that contains details about the data.

• Headers are used in communication protocols to provide information about the data being transmitted.

• Headers typically include metadata such as the source and destination addresses, data type, and size.

• In HTTP, headers are used to pass additional information between the client and server, such as cookies or authentication tokens.

HTML comment is a way to add notes in the code that will not be displayed on the webpage.

• HTML comments are enclosed in <!-- and -->

• They are used to add notes for developers or to temporarily disable code

• Example: <!-- This is a comment -->

HTML helpers are methods that help in rendering HTML in a view. Yes, we can create custom HTML helpers.

• HTML helpers are methods that generate HTML markup in a view.

• They help in reducing the amount of HTML code that needs to be written in a view.

• Custom HTML helpers can be created by defining extension methods on the HtmlHelper class.

• Custom HTML helpers can be useful for generating reusable HTML components or complex HTML markup.

• Example: Creating a custom HTML helper to generat...read more

Session can be maintained in .Net MVC using various methods.

• Session can be maintained using InProc, StateServer, SQLServer or Custom mode.

• InProc mode stores session data in the application's memory.

• StateServer mode stores session data in a separate process called ASP.NET State Service.

• SQLServer mode stores session data in a SQL Server database.

• Custom mode allows developers to create their own session state provider.

• Session can be accessed using HttpContext.Current.Session obj...read more

HTML is a markup language used for creating web pages.

• <html> - defines the root of an HTML document

• <head> - contains meta-information about the document

• <title> - sets the title of the document

• <body> - contains the visible content of the document

• <h1> - defines a heading

• <p> - defines a paragraph

HTML Sanitizer is a tool used to remove potentially harmful HTML tags and attributes from user input to prevent XSS attacks.

• HTML Sanitizer helps prevent Cross-Site Scripting (XSS) attacks by removing potentially harmful HTML tags and attributes from user input.

• It sanitizes input by stripping out any tags or attributes that could be used for malicious purposes.

• Example: Sanitizing user input in a comment section to prevent script injection.

HTML5 tags are elements used to structure and format content on a web page.

• HTML5 tags are used to define different parts of a webpage, such as headings, paragraphs, images, links, etc.

• Some common HTML5 tags include <div>, <p>, <h1> to <h6>, <img>, <a>, <ul>, <li>, <table>, <form>, etc.

• HTML5 tags are enclosed in angle brackets <> and usually come in pairs - an opening tag and a closing tag.

CSS is a styling language used to control the look and feel of a website. It can be added to HTML using the <style> tag or external CSS files.

• CSS stands for Cascading Style Sheets

• It is used to define the layout, colors, fonts, and other visual aspects of a website

• CSS can be added to HTML using the <style> tag within the <head> section or by linking an external CSS file using the <link> tag

• Inline CSS can also be added directly to HTML elements using the style attribute

• Example:...read more

HTML abbreviations are short forms used in HTML coding for easier and faster writing.

• HTML - HyperText Markup Language

• CSS - Cascading Style Sheets

• JS - JavaScript

• API - Application Programming Interface

HTML is a markup language for creating web pages, while XHTML is a stricter version of HTML that follows XML rules.

• HTML stands for HyperText Markup Language and is used for creating web pages.

• XHTML stands for eXtensible HyperText Markup Language and is a stricter version of HTML that follows XML rules.

• XHTML requires all tags to be properly nested and closed, unlike HTML which is more forgiving.

• XHTML documents must be well-formed XML documents, while HTML documents do not have...read more

DHTML stands for Dynamic HTML, which is a combination of HTML, CSS, and JavaScript to create interactive and dynamic web pages.

• DHTML allows for elements on a web page to change dynamically without needing to reload the entire page.

• It is used to create interactive menus, animations, and other dynamic content on websites.

• DHTML is commonly used in web development to enhance user experience and create more engaging websites.

Facades in Laravel provide a simple and convenient way to access classes and services from the container.

• Facades act as static proxies to underlying classes, allowing easy access to their methods.

• They provide a clean and expressive syntax for accessing services.

• Facades are used to access Laravel's core services, such as the database, cache, and session.

• They can be used to access custom classes and services registered in the container.

• Facades help in decoupling the code by pro...read more

HTML is a markup language used for creating web pages. Tags are used to define the structure and content of the page.

• HTML stands for HyperText Markup Language.

• It is used to create the structure of web pages by using tags.

• Tags are enclosed in angle brackets (<>) and come in pairs - opening tag and closing tag.

• Example: <p>This is a paragraph.</p>

Semantic tags in HTML are special tags that provide meaning to the content they enclose.

• Semantic tags help search engines and screen readers understand the structure of a webpage.

• Examples of semantic tags include <header>, <footer>, <nav>, <article>, <section>, <aside>, <main>, <figure>, <figcaption>.

• Using semantic tags improves SEO and accessibility of a website.

To initialize Chrome driver, create an instance of ChromeDriver class.

• Create an instance of ChromeDriver class

• Set the path of ChromeDriver executable file

• Use the instance to interact with the browser

Microservices in JavaScript are small, independent, and loosely coupled services that work together to form a larger application.

• Microservices are designed to be modular and scalable

• Each microservice performs a specific task and communicates with other microservices through APIs

• They can be written in different programming languages and can run on different servers

• Examples of microservices in JavaScript include Netflix, PayPal, and Uber

Redux is a state management library for React. React lifecycle methods are hooks that allow us to run code at specific points in a component's lifecycle.

• Redux flow involves dispatching actions, which are handled by reducers to update the state. The updated state is then passed down to the components via props.

• React lifecycle methods include componentDidMount, componentDidUpdate, and componentWillUnmount. They allow us to perform actions when a component mounts, updates, or un...read more

React is a JavaScript library for building user interfaces.

• React allows for reusable UI components

• It uses a virtual DOM for efficient updates

• React is declarative, making it easier to understand and debug code

• It has a large and active community with many resources available

• React can be used for both web and mobile app development

Events in LWCs differ from Aura components in terms of syntax, propagation, and handling.

• In LWCs, events are dispatched using the standard DOM event model, while in Aura components, events are handled using the Aura event system.

• LWC events use standard JavaScript event handling methods like addEventListener and dispatchEvent, while Aura events use $A.get('e.namespace:eventName').fire().

• LWC events do not bubble up the DOM hierarchy by default, while Aura events bubble up the c...read more

Debugging a website involves identifying and fixing errors in the code and design.

• Use browser developer tools to inspect elements and console logs

• Check for syntax errors and broken links

• Test website on different browsers and devices

• Use debugging tools like Xdebug or Firebug

• Ask for help from colleagues or online communities

Design a form and store data in a database.

• Create a form with input fields for relevant data

• Use a server-side language like PHP to handle form submission

• Connect to a database and create a table to store the data

• Insert the submitted data into the database table

A polyfill for Promise is a piece of code that provides the functionality of the Promise object in browsers that do not support it natively.

• Create a Promise constructor function that takes an executor function as an argument

• Implement the then, catch, and finally methods on the Promise prototype

• Handle asynchronous resolution and rejection of promises using callbacks or setTimeout

• Ensure proper chaining of promises by returning new promises in the then method

SOAP is a protocol for exchanging structured information in the implementation of web services, while REST is an architectural style for designing networked applications.

• SOAP is a protocol, while REST is an architectural style

• SOAP uses XML for message format, REST can use various formats like JSON, XML, etc.

• SOAP is more rigid and formal, REST is more flexible and lightweight

• SOAP has built-in security features like WS-Security, REST relies on external security mechanisms

• SOAP i...read more

The controller that renders the view depends on the framework being used.

• In ASP.NET MVC, the controller renders the view

• In AngularJS, the view is rendered by the browser

• In React, the view is rendered by the component

• The controller can pass data to the view for rendering

Annotations used in RESTful web services

• 1. @Path - Specifies the URI path for the resource

• 2. @GET - Specifies that the method handles HTTP GET requests

• 3. @POST - Specifies that the method handles HTTP POST requests

• 4. @PUT - Specifies that the method handles HTTP PUT requests

• 5. @DELETE - Specifies that the method handles HTTP DELETE requests

• 6. @PathParam - Binds the value of a URI template parameter to a method parameter

• 7. @QueryParam - Binds the value of a query parameter to ...read more

Magento CMS is an e-commerce platform while WordPress is a content management system.

• Magento is specifically designed for e-commerce websites, while WordPress is more versatile and can be used for various types of websites.

• Magento offers advanced features for managing products, inventory, and payments, while WordPress focuses more on content creation and management.

• Magento has a steeper learning curve and requires technical expertise, while WordPress is more user-friendly and...read more

To access rest endpoint in asynchronous manner, use AJAX or fetch API with async/await or promises.

• Use AJAX or fetch API to make asynchronous requests to the REST endpoint

• Use async/await or promises to handle the asynchronous response

• Ensure that the endpoint supports asynchronous requests

To post a value in a server, you need to consider the endpoint, request method, headers, body, and authentication.

• Identify the endpoint where the value needs to be posted

• Choose the appropriate request method (e.g., POST)

• Set the necessary headers (e.g., Content-Type)

• Construct the body payload with the value to be posted

• Handle authentication if required (e.g., API key, token)

Optimizing websites involves improving speed, user experience, and search engine ranking.

• Minimize HTTP requests

• Optimize images and videos

• Use caching and compression

• Reduce server response time

• Implement lazy loading

• Use a content delivery network (CDN)

• Optimize code and scripts

• Ensure mobile responsiveness

• Improve website security

• Use structured data for SEO

Designing a user-friendly menu page for restaurants on Swiggy to enhance customer experience.

• Include high-quality images of dishes

• Provide detailed descriptions of dishes

• Allow customers to filter by cuisine, price, and dietary restrictions

• Include ratings and reviews from other customers

• Enable easy customization of dishes

• Provide recommendations based on customer preferences

• Ensure the page is mobile-friendly

The recent version of CodeIgniter is 4.1.3

• CodeIgniter is a PHP framework used for web development

• Version 4.1.3 was released on October 28, 2021

• It includes bug fixes and improvements over the previous version

Lifecycle hooks in LWC are methods that allow developers to hook into the lifecycle of a component.

• ConnectedCallback - called when a component is inserted into the DOM

• RenderedCallback - called after a component's template has been rendered

• DisconnectedCallback - called when a component is removed from the DOM

• ErrorCallback - called when an error occurs in a component

• Example: connectedCallback() { console.log('Component connected to the DOM'); }

Optimize website performance by minimizing file sizes, reducing server requests, and caching content.

• Minimize file sizes by compressing images, minifying CSS and JavaScript files

• Reduce server requests by combining multiple files into one, using CSS sprites

• Enable browser caching to store static resources locally

• Use a content delivery network (CDN) to distribute content across multiple servers

• Optimize database queries and use efficient coding practices

Design Restapi for particular scenario

• Identify the resources and their endpoints

• Choose appropriate HTTP methods for each endpoint

• Define request and response formats using JSON

• Implement authentication and authorization mechanisms

• Ensure error handling and status codes are consistent

There are several types of Google mapping, including Google Maps, Google Earth, and Google Street View.

• Google Maps is a web-based mapping service that provides directions, traffic information, and satellite imagery.

• Google Earth is a virtual globe that allows users to explore the Earth's surface using satellite imagery and aerial photography.

• Google Street View provides panoramic views of streets and locations using 360-degree street-level imagery.

• Other types of Google mapping ...read more

Event bubbling and capturing are two ways of propagating events in the DOM tree.

• Event capturing is the process of triggering the outermost element's event first and then moving towards the innermost element.

• Event bubbling is the process of triggering the innermost element's event first and then moving towards the outermost element.

• Event capturing is rarely used in practice, while event bubbling is the default behavior in most browsers.

• Event.stopPropagation() can be used to st...read more

IIS server is a web server that processes and serves HTTP requests.

• IIS stands for Internet Information Services.

• It is a component of the Windows Server operating system.

• IIS uses HTTP protocol to communicate with clients and serve web content.

• It listens for incoming requests on a specified port, usually port 80 for HTTP and port 443 for HTTPS.

• When a request is received, IIS processes it and returns the appropriate response.

• IIS can handle various types of requests, including st...read more

Server side code runs on the server and client side code runs on the client's browser.

• Server side code is executed on the server before the data is sent to the client's browser.

• Client side code is executed on the client's browser after receiving the data from the server.

• Examples of server side code include PHP, Java, and Python.

• Examples of client side code include JavaScript, HTML, and CSS.

Custom hooks in Angular are functions that allow you to reuse logic across multiple components.

• Custom hooks are created using the @Injectable decorator

• They can be used to share stateful logic between components

• They can also be used to abstract away complex logic from components

• Custom hooks can be tested independently of components

Class components and functional components are two ways to create components in React Native.

• Class components are created using ES6 class syntax and extend the React.Component class.

• Functional components are created using JavaScript functions.

• Class components have a state and lifecycle methods, while functional components do not.

• Functional components are simpler and easier to test and maintain.

• Class components are recommended for complex components with state and lifecycle ne...read more

Create a tab section using JavaScript

• Use HTML and CSS to create the tab structure

• Use JavaScript to handle the tab functionality

• Add event listeners to the tab elements to switch between tabs