Top 250 Web Development Interview Questions and Answers

Use Selenium WebDriver to find and count all text boxes on a web page.

• Use Selenium WebDriver to locate all text boxes on the web page

• Use findElements method with input tag and type attribute as text to find all text boxes

• Get the size of the list of e...read more

Debouncing in JavaScript is a technique used to limit the number of times a function is called in a short period of time.

• Debouncing is used to improve performance and prevent unnecessary function calls.

• It delays the execution of a function until afte...read more

Optimizing a React app involves reducing bundle size, using lazy loading, and optimizing rendering performance.

• Reduce bundle size by code splitting and using dynamic imports

• Use lazy loading to load components only when needed

• Optimize rendering perfor...read more

To call REST APIs in Angular, use the HttpClient module and its methods like get(), post(), put(), delete().

• Import the HttpClientModule in your Angular module

• Inject the HttpClient service in your component or service

• Use the HttpClient methods to make...read more

Nodejs application can be deployed using various tools like Heroku, AWS, DigitalOcean, etc.

• Use a cloud platform like Heroku, AWS, DigitalOcean, etc.

• Create a production build of the application

• Configure environment variables

• Use a process manager like ...read more

The phases of each component in the React lifecycle include mounting, updating, and unmounting.

• Mounting phase: constructor, static getDerivedStateFromProps, render, componentDidMount

• Updating phase: static getDerivedStateFromProps, shouldComponentUpda...read more

Authentication and authorization can be implemented in Web API using various methods such as OAuth, JWT, and Identity Framework.

• Use OAuth for third-party authentication and authorization

• Use JWT for token-based authentication and authorization

• Use Iden...read more

Various authentication methods can be used to secure REST API, including OAuth, JWT, Basic Authentication, and API Keys.

• OAuth is a popular authentication method that allows users to grant access to third-party applications without sharing their crede...read more

Redux helps manage application state in a predictable way.

• Centralized state management

• Predictable state changes with actions and reducers

• Time-travel debugging with Redux DevTools

• Ecosystem of middleware for additional functionality

Pseudo classes and pseudo elements are CSS selectors that target specific states or parts of an element.

• Pseudo classes target specific states of an element, such as :hover, :active, and :focus.

• Pseudo elements target specific parts of an element, such...read more

PUT is used to update an existing resource, PATCH is used to partially update an existing resource, and POST is used to create a new resource.

• PUT replaces the entire resource with the new one, while PATCH only updates the specified fields

• PUT and PATC...read more

CORS in MVC is Cross-Origin Resource Sharing, a mechanism that allows restricted resources on a web page to be requested from another domain.

• CORS is a security feature implemented in web browsers to prevent cross-origin requests by default.

• It works b...read more

API stands for Application Programming Interface. It is a set of protocols and tools for building software applications.

• API allows different software applications to communicate with each other

• Types of API include: REST, SOAP, XML-RPC, JSON-RPC, and ...read more

Clone a Todo Application UI using ReactJS, Sass

• Create a new ReactJS project using create-react-app

• Design the UI using Sass and implement it in ReactJS

• Use state and props to manage the todo list

• Add functionality to add, delete and mark tasks as comple...read more

The candidate is asked to write XPath and CSS selectors for elements on a webpage.

• XPath is a language used to navigate XML documents and can be used to locate elements on a webpage.

• CSS selectors are patterns used to select elements on a webpage based...read more

Cookies in PHP are small text files that are stored on the user's computer to track and store information about the user's activities on a website.

• Cookies are used to remember user preferences and login information.

• They can be set, retrieved, and del...read more

Different types of popups and how to handle them

• Modal popups - require user action before continuing

• Non-modal popups - can be closed without user action

• Lightbox popups - overlay on top of the page

• Sticky popups - remain visible even when scrolling

• To h...read more

Fragments in React.js are used to group multiple elements without adding an extra node to the DOM.

• Fragments are a way to group multiple elements without using a wrapper element.

• They help in avoiding unnecessary divs in the DOM.

• Fragments can improve p...read more

ASP is a scripting language while ASP.NET is a web application framework.

• ASP is interpreted while ASP.NET is compiled

• ASP uses VBScript or JScript while ASP.NET uses C# or VB.NET

• ASP is outdated while ASP.NET is the current technology

• ASP.NET has better...read more

Laravel is a PHP web application framework that follows the Model-View-Controller (MVC) architectural pattern.

• Install Laravel using Composer

• Create a new Laravel project using the command 'laravel new project-name'

• Define routes in the 'routes/web.php'...read more

Validations in the login feature of Salesforce ensure secure access and prevent unauthorized entry.

• Validations can be used to enforce password complexity requirements.

• IP range restrictions can be implemented to allow access only from specific locatio...read more

MVC architecture in Spring separates the application into three main components: Model, View, and Controller.

• Model represents the data and business logic of the application.

• View is responsible for displaying the data to the user.

• Controller acts as an...read more

Fetch data from API to display array list of strings

• Use fetch() method to retrieve data from API

• Parse the response data using JSON.parse()

• Loop through the array and create a list element for each item

• Append the list elements to the DOM

Google reCAPTCHA is a security measure to prevent spam and bots. It cannot be solved in SEO.

• Google reCAPTCHA is designed to prevent automated bots from accessing websites.

• It is not possible to solve reCAPTCHA in SEO as it is a security measure.

• SEO an...read more

UI policy and client script are both used in ServiceNow for controlling field behavior and data on forms.

• UI policy is used to dynamically change field properties, visibility, and mandatory status based on certain conditions.

• Client script is used to a...read more

To develop a Spring Boot application, follow these steps:

• Create a new Spring Boot project using Spring Initializr

• Define the necessary dependencies in the pom.xml file

• Create the necessary Java classes and packages

• Define the application properties in t...read more

Bootstrapping in SAPUI5 is the process of initializing the SAPUI5 framework and loading the necessary resources.

• Bootstrapping is done by including the SAPUI5 library in the HTML page

• It sets up the runtime environment for SAPUI5 applications

• Bootstrapp...read more