UI Developer

10+ UI Developer Interview Questions and Answers for Freshers

Updated 2 Jul 2025
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Asked in Frrole

4d ago

Q. How can we reverse a string in JavaScript in one line?

Ans.

The string can be reversed in one line using the split(), reverse(), and join() methods.

  • Use the split() method to convert the string into an array of characters

  • Use the reverse() method to reverse the order of the array elements

  • Use the join() method to convert the reversed array back into a string

Asked in SysMind

3d ago

Q. How do you detect a cycle in a linked list?

Ans.

To detect a cycle in a linked list, use Floyd's Tortoise and Hare algorithm.

  • Initialize two pointers, slow and fast, at the head of the linked list.

  • Move slow pointer by one step and fast pointer by two steps. If they meet at any point, there is a cycle.

  • If fast pointer reaches the end of the list without meeting slow pointer, there is no cycle.

Q. What do you know about machine learning?

Ans.

Machine learning is a subset of AI that enables systems to learn from data and improve over time without explicit programming.

  • Machine learning algorithms can be supervised (e.g., predicting house prices) or unsupervised (e.g., clustering customer data).

  • Common algorithms include decision trees, neural networks, and support vector machines.

  • Applications range from image recognition (e.g., facial recognition) to natural language processing (e.g., chatbots).

  • Machine learning is use...read more

Asked in Capgemini

6d ago

Q. What is a tuple in Python, and is it mutable?

Ans.

A tuple in Python is an immutable sequence type used to store collections of items.

  • Tuples are defined using parentheses: example: my_tuple = (1, 2, 3)

  • They are immutable, meaning once created, their elements cannot be changed.

  • Tuples can contain mixed data types: example: mixed_tuple = (1, 'hello', 3.14)

  • They support indexing and slicing: example: my_tuple[1] returns '2'

  • Tuples can be nested: example: nested_tuple = ((1, 2), (3, 4))

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4d ago

Q. Write a program to calculate the sum of an array.

Ans.

Program to calculate the sum of an array

  • Iterate through the array and add each element to a running total

  • Use a loop or a built-in array method to calculate the sum

  • Handle edge cases like empty arrays or non-numeric elements

4d ago

Q. Write a program to add two arrays.

Ans.

Program to add two arrays of strings

  • Create two arrays of strings

  • Loop through both arrays and add corresponding elements

  • Store the result in a new array

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6d ago

Q. Write a program to reverse a sentence.

Ans.

Program to reverse a sentence using array of strings

  • Split the sentence into an array of words

  • Loop through the array and reverse the order of the words

  • Join the reversed array into a sentence

Asked in TradeLeaves

4d ago

Q. What are the differences between JavaScript ES6 functions and previous versions?

Ans.

ES6 introduced arrow functions, default parameters, rest parameters, spread syntax, and more.

  • Arrow functions provide a more concise syntax for writing functions.

  • Default parameters allow you to specify default values for function parameters.

  • Rest parameters allow you to pass an indefinite number of arguments to a function as an array.

  • Spread syntax allows you to expand an array into individual elements when calling a function.

  • ES6 also introduced template literals for string inte...read more

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1d ago

Q. To design a responsive website

Ans.

To design a responsive website

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

  • Implement a fluid grid system to ensure content adapts to different devices

  • Optimize images and other media for faster loading on mobile devices

  • Consider touch-friendly navigation and interactions

  • Test the website on various devices and screen sizes to ensure responsiveness

Asked in TradeLeaves

6d ago

Q. What is your experience with WordPress websites?

Ans.

I have extensive experience working with WordPress websites, including custom theme development and plugin integration.

  • Developed custom WordPress themes from scratch

  • Integrated third-party plugins for added functionality

  • Optimized website performance and SEO for WordPress sites

  • Created custom post types and taxonomies for specific content needs

Asked in SysMind

3d ago

Q. Floyd's tortoise and hare algorithm

Ans.

Floyd's tortoise and hare algorithm is used to detect a cycle in a linked list.

  • The algorithm involves two pointers moving at different speeds through the linked list.

  • If there is a cycle, the two pointers will eventually meet at the same node.

  • This algorithm has a time complexity of O(n) and space complexity of O(1).

Asked in Wipro

2d ago

Q. Write a for loop to find a value in an array.

Ans.

Using a for loop to find a specific value in an array of strings.

  • Use a for loop to iterate through the array

  • Check each element to see if it matches the desired value

  • Return the index of the matching element or -1 if not found

Asked in TradeLeaves

1d ago

Q. Explain various functions.

Ans.

Functions in programming are blocks of code that perform a specific task when called.

  • Functions can take input parameters and return output values.

  • Functions can be reusable and modular, making code more organized.

  • Examples: Math.sqrt() calculates the square root of a number, console.log() outputs a message to the console.

Asked in Tata Motors

6d ago

Q. Tell me about your previous experiences.

Ans.

I have extensive experience in UI development, focusing on user-centric design and responsive interfaces.

  • Worked on a project for an e-commerce platform, enhancing user experience by implementing a mobile-first design.

  • Collaborated with UX designers to create wireframes and prototypes, ensuring alignment with user needs.

  • Utilized frameworks like React and Angular to build dynamic, responsive web applications.

  • Conducted usability testing to gather feedback and iteratively improve ...read more

Asked in TradeLeaves

5d ago

Q. UI and UX differences

Ans.

UI focuses on the look and feel of a website or application, while UX focuses on the overall user experience.

  • UI deals with the visual aspects such as layout, colors, typography, and interactive elements.

  • UX focuses on the overall user journey, ease of use, and user satisfaction.

  • UI is more about the design and presentation, while UX is about the functionality and usability.

  • Good UI enhances the aesthetic appeal, while good UX ensures a seamless and enjoyable user experience.

  • Exam...read more

2d ago

Q. What is React?

Ans.

React is a popular JavaScript library for building user interfaces, particularly single-page applications, using a component-based architecture.

  • Component-Based: React allows developers to build encapsulated components that manage their own state, making code reusable and easier to maintain.

  • Virtual DOM: React uses a virtual DOM to optimize rendering, updating only the parts of the UI that have changed, which improves performance.

  • Declarative Syntax: React enables developers to ...read more

Asked in Wipro

4d ago

Q. Can you use a for loop to find a value in an array?

Ans.

To find array values using for loop

  • Declare a variable to store the sum of array values

  • Use a for loop to iterate through the array

  • Access each element using array[index] syntax

  • Add the element value to the sum variable

  • Return the sum variable

Q. Create a chess board using HTML and CSS.

Ans.

Create a chess board using HTML and CSS

  • Use HTML to create a grid layout for the chess board

  • Use CSS to style the grid cells to alternate between black and white

  • Add chess piece images to the grid cells to represent the pieces

Asked in AmbitionBox

4d ago

Q. What are HTML and CSS?

Ans.

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

  • 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 layout and appearance of web pages.

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

  • CSS allows for styling elements by specifying p...read more

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