20+ Web Developer Intern Interview Questions and Answers

Web development interview questions covering SOAP, REST, namespaces, page speed, responsive design, CSS pseudo classes, and JavaScript variable scope.

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

• Namespaces are used to avoid naming conflicts between different parts of a program. In web development, they are used to organize code and avoid naming collisions.

• Page spe...read more

The method used to submit forms in JavaScript is the submit() method.

• The submit() method is called on the form element.

• It can be triggered by a button click or programmatically.

• Example: document.getElementById('myForm').submit();

OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.

• OOP focuses on creating objects that interact with each other to solve problems.

• In Java, classes are used to create objects, which can have attributes (fields) and behaviors (methods).

• Encapsulation, inheritance, and polymorphism are key principles of OOP in Java.

• Example: Creating a 'Car' class with attributes like 'brand' and 'model', ...read more

Type conversion in JavaScript is automatic and implicit, but can also be done explicitly using built-in functions.

• JavaScript automatically converts data types when needed

• Explicit type conversion can be done using built-in functions like parseInt() and parseFloat()

• Type conversion can lead to unexpected results, so it's important to be aware of it

XHTML is a stricter and cleaner version of HTML, following XML rules.

• XHTML is stricter in syntax and requires well-formed documents.

• XHTML tags must be properly nested and closed.

• XHTML is case-sensitive.

• HTML is more forgiving in terms of syntax errors.

• HTML tags do not necessarily need to be closed in the same way as XHTML.

Responsive websites can be made by using flexible grids, media queries, and responsive images.

• Use a flexible grid system like Bootstrap or CSS Grid

• Use media queries to adjust the layout based on screen size

• Use responsive images that scale with the screen size

• Test the website on different devices and screen sizes

Yes, I have knowledge about Laravel framework.

• I have worked on multiple projects using Laravel framework.

• I am familiar with its features like routing, migrations, and blade templating.

• I have also used Laravel's Eloquent ORM for database operations.

• I keep myself updated with the latest version of Laravel and its ecosystem.

I am proficient in HTML, CSS, JavaScript, and Python.

• HTML

• CSS

• JavaScript

• Python

React is a JavaScript library for building user interfaces.

• Advantages: component-based architecture, virtual DOM for efficient updates, large community and ecosystem, reusable code

• Disadvantages: steep learning curve, JSX syntax can be confusing for beginners, performance issues with large applications

• Example: Facebook, Instagram, Airbnb, Netflix all use React for their web applications

The code is a function that takes in an array of numbers, filters out even numbers, squares each remaining number, and returns the sum of the squared numbers.

• The code uses the filter method to remove even numbers from the array.

• It then uses the map method to square each remaining number.

• Finally, it uses the reduce method to sum up the squared numbers.

Responsive web design is an approach to web design that makes web pages render well on a variety of devices and window or screen sizes.

• It involves using flexible layouts and images

• It uses media queries to adjust the layout based on the device's screen size

• It prioritizes content and functionality for smaller screens

• Examples include Bootstrap, Foundation, and Materialize

Yes, I am familiar with both Shopify and Wix.

• I have experience in developing websites using Shopify and Wix platforms.

• I have worked on customizing themes, adding plugins, and optimizing websites on both platforms.

• For example, I have created an e-commerce website for a client using Shopify and a portfolio website using Wix.

PHP is a server-side scripting language used for web development.

• PHP stands for Hypertext Preprocessor

• It is used to create dynamic web pages and web applications

• PHP code can be embedded into HTML code

• It has a wide range of functions and libraries for various tasks

• Popular PHP frameworks include Laravel, CodeIgniter, and Symfony

I am proficient in HTML, CSS, JavaScript, Python, and Java.

• HTML

• CSS

• JavaScript

• Python

• Java

React is a JavaScript library for building user interfaces, and it has a component-based architecture with a virtual DOM.

• React is a front-end library developed by Facebook for building interactive user interfaces.

• It uses a component-based architecture where UI is broken down into reusable components.

• React has a virtual DOM which allows for efficient updates to the actual DOM.

• React has a lifecycle that includes methods like componentDidMount, componentDidUpdate, and componentW...read more

Potential improvements can include optimizing code, enhancing user experience, implementing new features, and fixing bugs.

• Optimize code for better performance

• Enhance user experience through UI/UX improvements

• Implement new features to add value for users

• Fix bugs and address any technical issues

• Regularly update and maintain the website or application

Cryptography algorithms are used to secure data by converting it into a code that can only be deciphered by authorized parties.

• Symmetric key algorithms: use the same key for encryption and decryption (e.g. AES, DES)

• Asymmetric key algorithms: use different keys for encryption and decryption (e.g. RSA, ECC)

• Hashing algorithms: convert data into a fixed-length hash value (e.g. SHA-256, MD5)

JavaScript is used for adding interactivity and dynamic behavior to websites.

• Allows for client-side scripting to enhance user experience

• Can manipulate HTML and CSS to create dynamic content

• Supports frameworks like React and Angular for building interactive web applications

Node.js is a runtime environment that allows you to run JavaScript on the server side.

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

• It uses an event-driven, non-blocking I/O model.

• Node.js is commonly used for building server-side applications and APIs.

• It has a large ecosystem of open-source libraries and frameworks, such as Express.js.

• Data Structures and Algorithms (DSA) are important for optimizing code efficiency and performance in Node.js applications.

Yes, I am familiar with HTML and CSS.

• I have experience creating responsive web pages using HTML and CSS.

• I am proficient in using CSS for styling and layout purposes.

• I have worked with CSS frameworks like Bootstrap to enhance the design of websites.

Multisites refer to a feature in web development where multiple websites can be managed from a single installation of a content management system.

• Allows for centralized management of multiple websites

• Each website can have its own domain or subdomain

• Shared resources and plugins can be used across all sites

• Commonly used in large organizations or businesses with multiple brands or divisions

HTML5 introduced new semantic elements, improved multimedia support, offline capabilities, and enhanced form controls.

• New semantic elements like <header>, <footer>, <nav>, <article>, <section>, <aside>

• Improved multimedia support with <audio> and <video> elements

• Offline capabilities with the use of Application Cache and Local Storage

• Enhanced form controls including new input types like email, url, date, etc.

• Canvas and SVG for graphics and animations

OOPS stands for Object-Oriented Programming System. Its pillars are Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundles data and methods that operate on the data into a single unit.

• Polymorphism: Allows objects of different classes to be treated as objects of a common superclass.

• Abstraction: Hides the complex implementation details and only shows the necessary feature...read more

Developed a web application for tracking student attendance and grades

• Used HTML, CSS, and JavaScript for front-end development

• Implemented PHP and MySQL for back-end functionality

• Included features such as user authentication, data visualization, and reporting

• Collaborated with team members to design and test the application

I have created several websites during my studies and personal projects.

• Created a personal portfolio website using HTML, CSS, and JavaScript

• Developed a blog website using WordPress CMS

• Built an e-commerce website using Shopify platform

• Collaborated with a team to create a social media platform using React and Node.js