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Wipro React Js Frontend Developer Interview Questions and Answers
Wipro React Js Frontend Developer Interview Experiences
1 interview found
Selected
I applied via Naukri.com and was interviewed before Oct 2023. There were 4 interview rounds.
Online coding round which included question from React and js
(2 Questions)
- Q1. Common questions from js
- Q2. Coding to do in react
(2 Questions)
- Q1. Managerial questions
- Q2. Questions based on resume
(1 Question)
- Q1. Salary discussion
Interview questions from similar companies
React Js Frontend Developer Interview Questions & Answers
Tech Mahindra
Anonymous
posted on 10 Dec 2024
Selected
I applied via Approached by Company and was interviewed in Nov 2024. There were 2 interview rounds.
(2 Questions)
- Q1. Explain Virtual DOM, Key Features of React, Hooks in React, create a todo app in react
- Ans.
Virtual DOM is a lightweight copy of the actual DOM, React key features include component-based architecture, declarative syntax, and virtual DOM, React Hooks are functions that let you use state and other React features without writing a class.
Virtual DOM is a lightweight copy of the actual DOM that React uses to improve performance by updating only the necessary parts of the DOM.
Key features of React include componen...
- Q2. Javascript Questions- Closures,promises,Async/await,setTimeOut, write acode to reverse a string
(2 Questions)
- Q1. Self Introduction, some situation based questions
- Q2. Basic HR regular questions
I applied via Naukri.com and was interviewed in Aug 2024. There were 2 interview rounds.
Online Hackathon test was taken.
(6 Questions)
- Q1. Tell Me About Yourself.
- Ans.
I am a passionate React Js Frontend Developer with experience in building user-friendly and responsive web applications.
Experienced in developing web applications using React Js
Proficient in HTML, CSS, and JavaScript
Familiar with state management libraries like Redux
Strong understanding of responsive design principles
Ability to work collaboratively in a team environment
- Q2. Tell me about your roles and responsibilities in your current project.
- Ans.
I am responsible for developing and maintaining the frontend of the project using React Js.
Developing user-friendly interfaces using React Js
Implementing responsive design and ensuring cross-browser compatibility
Collaborating with backend developers to integrate frontend with backend services
Optimizing application performance and troubleshooting issues
Participating in code reviews and providing feedback to team members
- Q3. How we implement SSR in React.
- Ans.
SSR in React is implemented using server-side rendering to pre-render React components on the server before sending them to the client.
Use libraries like Next.js or Gatsby to implement SSR in React.
Configure server to render React components on the server side.
Optimize server-side rendering for performance by caching rendered components.
- Q4. How can we change our project in production mode from development mode.
- Ans.
To change a React project from development mode to production mode, you need to build the project using the 'npm run build' command.
Run 'npm run build' command in the terminal to create a production build of the project.
This command will generate a 'build' folder with optimized and minified files for production.
You can then deploy the contents of the 'build' folder to a web server for production use.
- Q5. What is lazy loading and how we can implement in our project.
- Ans.
Lazy loading is a technique used to defer loading non-essential resources until they are needed.
Lazy loading helps improve performance by only loading resources when they are required.
In React, lazy loading can be implemented using React.lazy() and Suspense components.
Example: const MyComponent = React.lazy(() => import('./MyComponent'));
Example:
Loading...
React routing is a way to handle navigation in a React application by defining routes and rendering components based on the URL.
React routing allows for declarative routing, where routes are defined using JSX elements.
It enables dynamic routing based on the URL, allowing for different components to be rendered based on the route.
React Router is a popular library for handling routing in React applications.
Unlike convent...
Interview Preparation Tips
Skills evaluated in this interview
(2 Questions)
- Q1. Explain ES6 Concepts
- Q2. Difference between shallow copy and deep copy
(2 Questions)
- Q1. About my project
- Q2. Work flow and all
(2 Questions)
- Q1. What is prop drilling
- Ans.
Prop drilling is the process of passing props down multiple levels of nested components in React.
Prop drilling occurs when a prop needs to be passed through multiple levels of components that do not need the prop themselves.
It can lead to unnecessary passing of props through intermediate components, making the code harder to maintain.
To avoid prop drilling, you can use Context API, Redux, or React's useContext and useR...
- Q2. What is hoisting
- Ans.
Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during the compilation phase.
Variable declarations are hoisted to the top of their scope, but not their assignments.
Function declarations are fully hoisted, meaning they can be called before they are declared.
Hoisting can lead to unexpected behavior if not understood properly.
(1 Question)
- Q1. Explain useContext hook
- Ans.
useContext hook allows components to access data from a context without passing props down manually
useContext hook is used to consume a context created by React.createContext
It takes the context object as an argument and returns the current context value for that context
It allows components to subscribe to context changes and re-render when the context value changes
Skills evaluated in this interview
I applied via Approached by Company and was interviewed in Oct 2024. There was 1 interview round.
(1 Question)
- Q1. Why do we use Debugger in Javascript?
- Ans.
Debugger in JavaScript is used for pausing the execution of code to inspect variables, check the flow of the program, and debug errors.
Debugger helps in identifying and fixing bugs in the code.
It allows developers to step through code line by line to understand the flow of execution.
Developers can inspect variables and their values at different points in the code.
By setting breakpoints, developers can pause the code at...
Skills evaluated in this interview
I applied via Company Website and was interviewed in Dec 2024. There were 2 interview rounds.
(1 Question)
- Q1. Frontend developer
Html, CSS, bootstrap, JavaScript, react.js
Interview Preparation Tips
- Html5
- CSS3
- Bootstrap
- Javascript
- React.Js
I applied via Naukri.com and was interviewed in Jul 2024. There were 2 interview rounds.
(1 Question)
- Q1. All javascript core concepts and react hooks
Find the max values, promises, async await
Based on the latest react version.
Pooja Thakur
(1 Question)
- Q1. Tell me about your self
What is react , feature, axios, API
Redux Redux toolkit Redux thunk
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