30+ Web Developer Trainee Interview Questions and Answers

There are three ways to link CSS: inline, internal, and external. Inline has the highest priority.

• Inline CSS is applied directly to an HTML element using the 'style' attribute.

• Internal CSS is defined within the 'style' tags in the head section of an HTML document.

• External CSS is linked to an HTML document using the 'link' tag with the 'rel' attribute set to 'stylesheet'.

• Inline CSS has the highest priority, followed by internal CSS, and then external CSS.

Doctype defines the version of HTML being used and helps browsers render the page correctly.

• Doctype declaration is used to specify the version of HTML being used in the document.

• It helps browsers to render the web page correctly by triggering standards mode.

• If the doctype is removed, browsers may render the page in quirks mode which can lead to inconsistent display.

• For example, without a doctype, some CSS styles may not be applied correctly.

Meta tags are HTML tags that provide metadata about a webpage. They are used to provide information about the page to search engines and browsers.

• Meta tags are placed in the head section of an HTML document.

• Common types of meta tags include meta description, meta keywords, and meta viewport.

• Meta description provides a brief summary of the webpage's content.

• Meta keywords are used to specify keywords relevant to the webpage's content.

• Meta viewport controls the layout and scalin...read more

Block elements take up the full width available, while inline elements only take up as much width as necessary.

• Block elements start on a new line and stack vertically, while inline elements flow within the text.

• Block elements can have margins and padding applied to all sides, while inline elements only have left and right margins and padding.

• Examples of block elements include <div>, <p>, <h1>-<h6>, while examples of inline elements include <span>, <a>, <strong>.

Achieve responsiveness in web page by using media queries, flexible layouts, and fluid images.

• Use CSS media queries to apply different styles based on screen size

• Create flexible layouts using CSS Grid or Flexbox

• Use relative units like percentages and ems instead of fixed pixels

• Optimize images for different screen sizes using srcset and sizes attributes

• Test responsiveness across different devices and browsers

To declare a variable in JavaScript, use the 'var', 'let', or 'const' keyword followed by the variable name.

• Use 'var' to declare a variable with function scope

• Use 'let' to declare a variable with block scope

• Use 'const' to declare a constant variable

• Example: var age = 25; let name = 'John'; const PI = 3.14;

To include Bootstrap into an HTML document, link the Bootstrap CSS and JavaScript files in the head section.

• Download the Bootstrap CSS and JavaScript files from the official website.

• Place the CSS file link inside the head section using the link tag.

• Place the JavaScript file link at the end of the body section using the script tag.

• Ensure the file paths are correct and relative to the HTML document.

CSS box model is a design concept that describes how elements are rendered on a web page.

• The CSS box model consists of four main components: content, padding, border, and margin.

• The content area is where the actual content of the element is displayed.

• Padding is the space between the content and the border.

• Border is a line that surrounds the padding and content.

• Margin is the space between the border and other elements on the page.

• The width and height of an element are calculat...read more

Bootstrap grid system is a responsive grid system that allows developers to create responsive layouts for web pages.

• Bootstrap grid system is based on a 12-column layout.

• It uses CSS classes to define the layout structure.

• Developers can easily create responsive designs by utilizing the grid system.

• The grid system provides different classes for different screen sizes, such as 'col-sm' for small screens and 'col-lg' for large screens.

• Example:

  Content

To find second maximum element in an array, sort the array in descending order and return the second element.

• Sort the array in descending order

• Return the second element

Localhost in WordPress refers to the local server environment used for development and testing.

• Local server environment used for testing and development

• Can be accessed through the URL http://localhost/wordpress

• Allows developers to test changes before deploying to live site

Doctype in HTML specifies the version of HTML being used in the document.

• Doctype declaration is placed at the very beginning of an HTML document before the <html> tag.

• It helps the browser to render the web page correctly by specifying the version of HTML being used.

• Example: <!DOCTYPE html> specifies the document is using HTML5.

A WordPress Theme is a collection of files that determine the look and feel of a WordPress website.

• Themes control the design and layout of a WordPress website

• They include templates, stylesheets, and other files

• Themes can be customized or created from scratch

• Examples of popular themes include Divi, Avada, and Astra

Containers are lightweight, isolated environments that package software and its dependencies for easy deployment and scalability.

• Containers provide a consistent and reproducible environment for running applications.

• They encapsulate an application and its dependencies, including libraries, binaries, and configuration files.

• Containers are portable and can run on any system that supports containerization.

• They offer efficient resource utilization and isolation, allowing multiple ...read more

Viewport is the visible area of a web page in a web browser.

• Viewport determines how much content can be seen without scrolling.

• It is defined by the size of the browser window.

• Viewport can be adjusted using meta tags in HTML.

• Responsive web design uses viewport to optimize layout for different devices.

z-index is a CSS property that controls the stacking order of elements on a webpage.

• z-index determines which elements appear in front or behind other elements

• Higher z-index values bring elements to the front

• z-index only works on positioned elements (position: absolute, position: relative, or position: fixed)

• z-index can be positive, negative, or zero

• Elements with higher z-index values will overlap elements with lower values

HTML is a markup language used for creating the structure of web pages, while CSS is a styling language used for designing the appearance of web pages.

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

• CSS stands for Cascading Style Sheets and is used to style the appearance of web pages.

• HTML uses tags to define elements like headings, paragraphs, images, links, etc.

• CSS is used to control the layout, colors, fonts, and other visual aspe...read more

React hooks are a feature introduced in React 16.8 that allow developers to use state and other React features in functional components.

• React hooks are functions that let you use state and other React features without writing a class

• They are used in functional components to manage state and lifecycle

• Hooks provide a way to reuse stateful logic across multiple components

• Some commonly used hooks are useState, useEffect, and useContext

SVG is vector-based and scalable, while Canvas is pixel-based and suited for dynamic graphics.

• SVG is XML-based, allowing for easy manipulation with CSS and JavaScript.

• Canvas is bitmap-based, rendering graphics on the fly using JavaScript.

• SVG maintains quality at any size, while Canvas can lose quality when scaled.

• SVG is better for static graphics like logos, while Canvas is ideal for animations and games.

• Example: SVG can create a responsive logo, while Canvas can render a rea...read more

I am very familiar with git and have used it extensively in my previous projects.

• I have experience with version control using git

• I am comfortable with git commands such as commit, push, pull, and merge

• I have used git for collaborative projects with multiple contributors

• I have experience with git branching and merging strategies

• I have used git for deployment and continuous integration

Hoisting is a JS mechanism where variable and function declarations are moved to the top of their scope.

• Variable declarations are hoisted but not their values

• Function declarations are fully hoisted

• Let and const declarations are not hoisted

phpMyAdmin is a web-based tool for managing MySQL databases, allowing users to interact with databases through a user-friendly interface.

• MySQL Database: phpMyAdmin primarily works with MySQL, a widely used relational database management system.

• User-Friendly Interface: It provides a graphical interface for users to manage databases, tables, and records without needing to write SQL queries directly.

• Database Management: Users can create, modify, and delete databases and tables e...read more

Wordpress is a free and open-source content management system (CMS) used to create websites and blogs.

• Wordpress is a CMS used to create websites and blogs

• It is free and open-source software

• It has a large community of developers and users

• It offers a wide range of themes and plugins for customization

• It is written in PHP and uses a MySQL database

MongoDB is a NoSQL document-oriented database that stores data in JSON-like documents.

• NoSQL database

• Document-oriented

• Stores data in JSON-like documents

• Schema-less

• Supports dynamic queries

• Scalable

• Open-source

• Used in web applications, mobile apps, and IoT devices

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine.

• Used for building scalable network applications

• Uses an event-driven, non-blocking I/O model

• Allows for server-side scripting with JavaScript

• Has a large and active open-source community

• Examples: Netflix, LinkedIn, Walmart

State is mutable data owned and managed by a component, while props are immutable data passed to a component.

• State is used to store and manage data within a component

• Props are used to pass data from a parent component to a child component

• State can be changed using setState() method

• Props cannot be changed within a component

• State is initialized within the constructor of a component

• Props are passed down from the parent component and accessed using this.props

• State is private to a...read more

I joined this company for its innovative projects, supportive culture, and opportunities for growth in web development.

• The company's commitment to cutting-edge technology aligns with my passion for web development.

• I admire the collaborative work environment that fosters creativity and teamwork.

• The opportunity to learn from experienced professionals in the field is invaluable.

• I am excited about the projects that focus on user experience and accessibility.