100+ Web Developer Interview Questions and Answers for Freshers

Find the index of the last occurrence of a specified element in an array.

• Iterate through the array from right to left to find the last occurrence of the element.

• Return the index if found, otherwise return -1.

• Consider 0-based indexing for the array.

The task is to determine if there exist two distinct indices in the array such that the absolute difference of the values at those indices is less than or equal to B and the absolute difference of the indices is less than or equal to A.

• Iterate through the array and keep track of the indices and values encountered so far

• Use a hashmap to store the values and their indices

• Check if the absolute difference of values is less than or equal to B and the absolute difference of indices...read more

Reverse a singly linked list of integers and return the head of the reversed linked list.

• Iterate through the linked list and reverse the pointers to point to the previous node instead of the next node.

• Use three pointers to keep track of the current, previous, and next nodes while reversing the linked list.

• Update the head of the reversed linked list as the last node encountered during the reversal process.

Create a deep copy of a linked list with random pointers without using references of original nodes.

• Iterate through the original linked list and create a new node for each node in the list.

• Store the mapping of original nodes to new nodes in a hashmap to handle random pointers.

• Update the random pointers of new nodes based on the mapping stored in the hashmap.

• Return the head of the copied linked list.

Determine the maximum amount of money a thief can steal from houses without looting two consecutive houses.

• Create an array 'dp' to store the maximum money that can be stolen from each house without looting two consecutive houses.

• Iterate through the houses and update 'dp' based on the maximum money that can be stolen from the current house.

• Return the maximum value in 'dp' as the answer.

The task is to find the Next Greater Element for each element in a list of integers.

• Iterate through the list of integers from right to left.

• Use a stack to keep track of elements for which the Next Greater Element is not yet found.

• Pop elements from the stack until a greater element is found or the stack is empty.

• Assign the Next Greater Element as the top element of the stack or -1 if the stack is empty.

To find the Nth prime number given a number N, implement a function that returns the Nth prime number.

• Create a function that takes N as input and returns the Nth prime number.

• Iterate through numbers starting from 2 and check if each number is prime.

• Keep track of the count of prime numbers found until reaching the Nth prime number.

• Return the Nth prime number once it is found.

The problem involves finding a contiguous subarray within an array with a given sum.

• Iterate through the array while keeping track of the sum of elements encountered so far.

• Use a hashmap to store the sum and its corresponding index.

• If the current sum minus the target sum is found in the hashmap, a subarray with the given sum exists.

• Return the start and end indices of the subarray if found, else return [-1, -1].

The task is to determine if a given string consisting of parentheses is balanced or not.

• Iterate through each character in the string and use a stack to keep track of opening parentheses

• If a closing parenthesis is encountered, check if it matches the top of the stack

• If the stack is empty at the end, the string is balanced

• If the stack is not empty or mismatched parentheses are encountered, the string is not balanced

Automate searching for profiles using stored mobile numbers and email addresses.

• Create a script to query the database for mobile numbers and email addresses

• Use a programming language like Python or SQL to automate the search process

• Implement a search algorithm to efficiently match profiles based on the stored data

To convert a website to WordPress, you can manually recreate the design, use a migration plugin, or hire a professional developer.

• Manually recreate the design by creating a custom WordPress theme based on the existing website's layout and functionality.

• Use a migration plugin like All-in-One WP Migration or Duplicator to transfer content, images, and settings from the old platform to WordPress.

• Hire a professional developer who specializes in website migrations to ensure a smoo...read more

Yes, I can design a website similar to Amazon by focusing on user-friendly interface, robust search functionality, secure payment options, and personalized recommendations.

• Focus on user-friendly interface with easy navigation

• Implement robust search functionality with filters and sorting options

• Provide secure payment options with encryption and fraud protection

• Include personalized recommendations based on user behavior and preferences

Page loading time can be reduced by optimizing images, minifying CSS and JS files, using a CDN, enabling caching, and reducing server response time.

• Optimize images by reducing file size without compromising quality

• Minify CSS and JS files to reduce their size

• Use a Content Delivery Network (CDN) to distribute content closer to users

• Enable caching to store static resources locally on the user's device

• Reduce server response time by optimizing code and database queries

Ruby on Rails is a web development framework written in Ruby that follows the Model-View-Controller (MVC) architectural pattern.

• Ruby on Rails is commonly referred to as Rails.

• It provides a set of conventions to simplify web development.

• Rails follows the MVC pattern, separating the application into models, views, and controllers.

• It emphasizes convention over configuration, reducing the need for explicit coding.

• Rails includes many built-in features like database migrations, rou...read more

Passionate about IT, HTML is a markup language, CSS is for styling

• I have always been passionate about IT and enjoy creating websites

• HTML is a markup language used for structuring content on web pages

• CSS is a styling language used to control the look and feel of a website

• HTML provides the structure, while CSS provides the style

DBMS stands for Database Management System. SQL stands for Structured Query Language.

• DBMS is a software that manages databases, allowing users to store, retrieve, and manipulate data.

• SQL is a programming language used to communicate with and manipulate databases.

• DBMS provides a structured way to organize and manage data, ensuring data integrity and security.

• SQL allows users to create, modify, and query databases using commands like SELECT, INSERT, UPDATE, and DELETE.

• Examples ...read more

I regularly use JavaScript, HTML, CSS, and PHP in my work as a web developer.

• JavaScript for client-side scripting and interactivity

• HTML for structuring content

• CSS for styling and layout

• PHP for server-side scripting and database connectivity

Use a subquery to find the second largest element in a dataset.

• Use a subquery to select the maximum value from the dataset.

• Then use another subquery to select the maximum value that is less than the maximum value found in the first subquery.

CSS can be applied inline within HTML elements or externally in a separate file.

• Inline CSS is applied directly within the HTML element using the 'style' attribute

• Internal CSS is included within the

A scripting language is a programming language that is used to write scripts, which are small programs that automate tasks.

• Scripting languages are interpreted rather than compiled

• They are often used for tasks such as web development, system administration, and automation

• Examples of scripting languages include JavaScript, Python, Ruby, and PHP

Drupal has 5 conceptual layers: Presentation, Data, Module, Node, and Field.

• Presentation layer handles the look and feel of the site

• Data layer manages the storage and retrieval of data

• Module layer provides additional functionality through modules

• Node layer handles content types and their display

• Field layer manages the fields that make up content types

HTML container tags are used to group and define sections of content on a webpage.

• The <div> tag is used to group elements together and define a section of content.

• The <span> tag is used to group inline elements together.

• The <section> tag is used to define sections of content within a webpage.

• The <header> tag is used to define a header section within a webpage.

• The <footer> tag is used to define a footer section within a webpage.

Pagination using CSS3 can be achieved by using the 'display: flex' property along with 'flex-wrap' and 'justify-content' properties.

• Use 'display: flex' property to create a flexible layout for pagination

• Set 'flex-wrap: wrap' to allow the pagination items to wrap to the next line when there is not enough space

• Use 'justify-content: center' to horizontally center the pagination items on the page

React is a JavaScript library for building user interfaces.

• React is a JavaScript library developed by Facebook.

• React uses a virtual DOM for better performance.

• React is component-based, making it easier to reuse code.

• React is mainly used for building single-page applications.

• Angular is a full-fledged framework for building web applications.

• Angular uses two-way data binding, while React uses one-way data flow.

• Angular has a steeper learning curve compared to React.

Python's main syllabus includes data types, control structures, functions, modules, classes, and libraries.

• Data types such as integers, floats, strings, lists, tuples, dictionaries

• Control structures like if-else statements, loops

• Functions for code reusability

• Modules for organizing code

• Classes for object-oriented programming

• Libraries like NumPy, Pandas, and Matplotlib for data manipulation and visualization

Some common hooks used in React.js are useState, useEffect, useContext, and useRef.

• useState - for managing state in functional components

• useEffect - for handling side effects in functional components

• useContext - for accessing context in functional components

• useRef - for accessing DOM elements or values in functional components

My driving force is my passion for creating innovative and user-friendly web applications.

• Passion for creating innovative and user-friendly web applications

• Desire to constantly learn and improve my skills

• Enjoyment of problem-solving and finding creative solutions

• Satisfaction in seeing the end result and how it benefits users

• Motivation to stay up-to-date with the latest technologies and trends

To check if a string is palindrome, compare it with its reverse.

• Remove all non-alphanumeric characters and convert to lowercase for accurate comparison.

• Use two pointers, one at the start and one at the end, and compare the characters at each position.

• If all characters match, the string is a palindrome.

• Example: 'A man, a plan, a canal: Panama' is a palindrome.

JavaScript is a programming language commonly used in web development for adding interactivity and dynamic content to websites.

• JavaScript is used for client-side scripting, allowing for interactive elements like forms, animations, and dynamic content.

• It can also be used for server-side scripting with Node.js to build backend applications.

• JavaScript frameworks like React, Angular, and Vue.js are popular for building dynamic and responsive web applications.

Entity Relation model is a conceptual representation of the data structure and relationships in a database.

• It is used to design and visualize the database schema.

• Entities represent real-world objects or concepts.

• Relations define the associations between entities.

• Attributes describe the properties or characteristics of entities.

• Primary keys uniquely identify each entity in a relation.

• Foreign keys establish relationships between entities.

• ER diagrams are commonly used to represe...read more

Capgemini uses a variety of technologies depending on the project requirements.

• Capgemini uses Java, .NET, Python, and other programming languages.

• They also use various frameworks such as Angular, React, and Vue.js.

• For database management, they use Oracle, MySQL, and MongoDB.

• Capgemini also focuses on emerging technologies like AI, blockchain, and IoT.

• The specific technology used depends on the project requirements and client needs.

External CSS is stored in separate files while internal CSS is included within the HTML file.

• External CSS is linked to HTML using tag.

• Internal CSS is defined within

Laravel is a PHP framework that allows for easy creation of APIs with CRUD functionality.

• Laravel is a popular PHP framework known for its elegant syntax and powerful features.

• API stands for Application Programming Interface, which allows different software applications to communicate with each other.

• CRUD stands for Create, Read, Update, Delete - the basic operations of a database.

• Using Laravel, developers can easily create APIs that perform CRUD operations on a database.

Constructor is used to create and initialize an object of a class.

• Constructor has the same name as the class.

• It is called automatically when an object is created.

• It can be used to set default values for object properties.

• It can also take parameters to initialize object properties.

• Example: class Person { constructor(name, age) { this.name = name; this.age = age; } }

• Example: let person1 = new Person('John', 30);

Yes, all modal and templates should be sent with a file zip.

• Ensure all modals and templates are properly zipped before sending.

• Use a file compression tool to create the zip file.

• Include all necessary files and assets in the zip file.

• Send the zip file through a secure and reliable method.

Drupal Cache stores data in memory or disk to improve website performance.

• Drupal Cache stores frequently used data in memory or disk to reduce database queries.

• Cache can be configured to store data for a specific time or until it is manually cleared.

• Drupal has several cache types like page cache, block cache, and dynamic page cache.

• Cache can be cleared manually or automatically when content is updated.

• Cache can be disabled for development purposes.

Types of CSS include inline, internal, external, and imported stylesheets.

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

• Internal CSS is defined within the head section of an HTML document using the style tag.

• External CSS is stored in a separate file and linked to the HTML document using the link tag.

• Imported CSS allows stylesheets to be imported into other stylesheets using the @import rule.

Tags in HTML are used to define the structure and content of a webpage.

• Tags are enclosed in angle brackets, like <tag>.

• They are used to define elements such as headings, paragraphs, images, links, etc.

• Tags can have attributes that provide additional information about the element.

The data structure used to reverse an array is a stack.

• A stack data structure can be used to reverse an array by pushing each element onto the stack and then popping them off in reverse order.

• Example: If we have an array of strings ['apple', 'banana', 'cherry'], we can reverse it using a stack to get ['cherry', 'banana', 'apple'].

API CRUD in PHP refers to creating, reading, updating, and deleting data using API endpoints in PHP.

• API CRUD allows for interacting with a database through HTTP methods like GET, POST, PUT, and DELETE.

• In PHP, this can be achieved by defining routes that correspond to CRUD operations and handling them in the backend code.

• For example, a GET request to /api/users would retrieve a list of users, while a POST request to the same endpoint would create a new user.

• CRUD operations are...read more

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 is used to define the content and structure of a web page, while CSS is used to define the layout and design.

• HTML uses tags to define elements lik...read more

External CSS files can be linked to HTML using the link tag in the head section.

• Create a separate CSS file with .css extension

• Add link tag in the head section of HTML file

• Specify the path of the CSS file in the href attribute of the link tag

• Example:

OOPS stands for Object-Oriented Programming System. It is a programming paradigm based on the concept of objects.

• OOPS is based on four main concepts: Encapsulation, Inheritance, Polymorphism, and Abstraction.

• Encapsulation is the process of hiding the implementation details of an object from the outside world.

• Inheritance allows a class to inherit properties and methods from another class.

• Polymorphism allows objects of different classes to be treated as if they were of the same...read more

The '#' symbol is used to comment code in Python.

• Use the '#' symbol to comment a single line of code.

• Use triple quotes (''' or ") to comment multiple lines of code.

• Comments are ignored by the Python interpreter and are used to explain the code.

JavaScript is used for frontend development because it allows for dynamic and interactive web pages.

• JavaScript enables client-side scripting, allowing for real-time updates and interactivity without requiring page reloads.

• It provides access to the Document Object Model (DOM), allowing developers to manipulate and modify web page elements.

• JavaScript can handle user events, validate input, and perform form submissions, enhancing user experience.

• It supports the creation of respo...read more

The company utilizes various technologies to enhance its operations and improve efficiency.

• The company uses web development frameworks such as React and Angular to build and maintain its websites and web applications.

• They employ cloud computing services like AWS or Azure for hosting and managing their applications and data.

• The company utilizes version control systems like Git to track changes and collaborate on code development.

• They employ project management tools like Jira o...read more

PHP Laravel is a popular PHP framework for web development, used for creating CRUD applications.

• PHP Laravel is a powerful MVC framework for building web applications

• CRUD stands for Create, Read, Update, Delete - basic operations for database management

• Laravel provides built-in support for CRUD operations through Eloquent ORM

• Example: Creating a blog application with Laravel where users can create, read, update, and delete blog posts