Top 250 Web Development Interview Questions and Answers

DOM Manipulation is the process of dynamically changing the structure or content of a web page using JavaScript.

• Use document.getElementById() to select an element by its ID

• Use element.innerHTML to modify the HTML content of an element

• Use element.styl...read more

A status code is a two-digit code used in medical billing to indicate the status of a claim or service.

• Status codes are used to indicate whether a claim has been accepted, rejected, or is pending.

• They can also indicate the reason for a denial or reje...read more

Code a React app to change name state on a click of a button on code sandbox.

• Create a functional component with a state for name

• Render a button with an onClick event to update the name state

• Display the name state in the component

• Use CodeSandbox to te...read more

Exceptions in Rest APIs are handled using try-catch blocks and appropriate error responses.

• Use try-catch blocks to catch exceptions that may occur during API execution.

• Handle different types of exceptions separately to provide specific error response...read more

DOM is a tree-like structure representing the HTML document, while Virtual DOM is a lightweight copy of the DOM.

• DOM is the actual representation of the HTML document in the browser's memory.

• Virtual DOM is a concept where a lightweight copy of the DOM...read more

Basic web development involves creating and maintaining websites using HTML, CSS, and JavaScript.

• Basic web development includes creating web pages using HTML, CSS, and JavaScript.

• It involves structuring the content of a website using HTML.

• CSS is used...read more

MERN is a full stack JavaScript framework that consists of MongoDB, Express.js, React, and Node.js.

• MERN stands for MongoDB, Express.js, React, and Node.js.

• It is used for building dynamic web applications.

• MongoDB is the database, Express.js is the bac...read more

It depends on the complexity of the authentication process and the technology stack used.

• I would need to understand the requirements and design of the login page.

• I would need to know the technology stack being used.

• If there are any existing authentic...read more

Power BI reports can be embedded into SharePoint using the Power BI web part.

• Add the Power BI web part to the SharePoint page

• Enter the URL of the Power BI report in the web part properties

• Configure the web part settings to customize the report displa...read more

Implicit objects in JSP servlets are predefined objects that can be accessed without any declaration or initialization.

• Implicit objects are automatically available in JSP servlets without the need for explicit declaration or initialization.

• These obje...read more

BS 4 engines are used for their improved fuel efficiency and reduced emissions.

• BS 4 engines comply with the latest emission norms set by the government.

• They have improved fuel efficiency due to advanced technology.

• BS 4 engines are more environment-fr...read more

Custom components in AEM can be created using the CRXDE Lite or Eclipse IDE.

• Create a new folder under /apps//components

• Create a new .content.xml file with the component's metadata

• Create a .html file with the component's markup

• Create a .clientlib file...read more

v-if and v-show are conditional rendering directives in Vue.js templates.

• v-if removes or adds elements to the DOM based on the condition, while v-show toggles the CSS display property.

• v-if has a higher toggle cost but is more efficient when the condi...read more

Optimize images, reduce HTTP requests, minify CSS and JS, use caching, and optimize database queries.

• Optimize images by compressing them and reducing their size.

• Reduce HTTP requests by combining multiple files into one.

• Minify CSS and JS by removing u...read more

jQuery post is a shorthand method for Ajax post in MVC.

• jQuery post is a shorthand method for Ajax post in MVC

• jQuery post uses the $.post() method while Ajax post uses $.ajax() method

• jQuery post is simpler and easier to use than Ajax post

• Both methods ...read more

MPC stands for Model Provider Class and is used to define the data model in OData. DPC stands for Data Provider Class and is used to define the data access logic in OData.

• MPC is responsible for defining the data model and metadata for the OData servi...read more

Sessions and cookies are used to store and retrieve data in web applications.

• Sessions are used to store data on the server side and are identified by a unique session ID.

• Cookies are used to store data on the client side and are stored as small text f...read more

Partial is a method in MVC that renders a specific portion of a view, while render partial renders a partial view.

• Partial is used to render a specific portion of a view, while render partial is used to render a partial view.

• Partial is typically used ...read more

JSON is lightweight, easy to read, and commonly used for web APIs. XML is more verbose, structured, and used for data interchange.

• JSON is lightweight and easy to read compared to XML

• XML is more verbose and structured than JSON

• JSON is commonly used fo...read more

Filters in ASP.NET MVC are used to perform pre- and post-processing of requests and responses.

• Filters are attributes that can be applied to controllers or actions.

• They can be used for authentication, caching, logging, error handling, etc.

• Some built-i...read more

Multiple databases can be connected to Drupal using the Database API and configuring settings.php file.

• Use the Database API to connect to additional databases

• Add the database connection details to settings.php file

• Use the db_set_active() function to ...read more

A search engine is a tool that allows users to search for information on the internet, while a directory is a curated list of websites organized by categories.

• Search engines use algorithms to crawl and index web pages, providing a comprehensive searc...read more

Developed a search engine UI using React framework in 30min

• Used React's useState and useEffect hooks to manage state and fetch data

• Implemented a search bar component with onChange event handler

• Displayed search results in a list using map function

• Adde...read more

The number of tables generated after installing WordPress varies depending on the plugins and themes installed.

• The default installation of WordPress generates 12 tables in the database.

• Additional tables may be created by plugins and themes.

• Examples o...read more

To add a new property in Google Analytics, follow these steps:

• Log in to your Google Analytics account

• Click on the Admin button in the bottom left corner

• Select the account and property where you want to add the new property

• Click on the Create Property...read more

Implement infinite scrolling in React JS using Intersection Observer API.

• Use Intersection Observer API to detect when the user has scrolled to the bottom of the page.

• Fetch new data and append it to the existing data using setState.

• Use a loading spinn...read more

AngularJS is a JavaScript framework for building dynamic web applications.

• AngularJS is a client-side MVC framework.

• It allows developers to build single-page applications.

• It extends HTML with new attributes and tags.

• AngularJS uses two-way data binding...read more