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Wipro Reactjs Developer Interview Questions and Answers
Wipro Reactjs Developer Interview Experiences
3 interviews found
Anonymous
I applied via Recruitment Consulltant and was interviewed in Nov 2023. There were 3 interview rounds.
Progress bar in react and remote data fetching
(1 Question)
- Q1. Ui related questions
(1 Question)
- Q1. Asked for preferred location and salary
I applied via Naukri.com and was interviewed in Apr 2022. There was 1 interview round.
(3 Questions)
- Q1. What is closures, Hoisting with example Semantic elements
- Ans.
Closures and hoisting are important concepts in JavaScript.
Closures refer to the ability of a function to access variables in its outer scope even after the function has returned.
Hoisting is the behavior of moving variable and function declarations to the top of their respective scopes.
Example of closures: function outer() { let x = 10; function inner() { console.log(x); } return inner; } const innerFunc = outer(); inn...
- Q2. Chaining Methods Currying Call bind and apply Optimization of application Server side rendering
- Q3. Selectors HTML 5 features
Interview Preparation Tips
Practice for scope of variables inside and outside of functions
Interview Questionnaire
3 Questions
- Q1. What are the new features in react 16?
- Ans.
React 16 introduced new features like React Fiber, Error Boundaries, Portals, and improved server-side rendering.
React Fiber is a new reconciliation engine that improves performance and enables incremental rendering.
Error Boundaries allow developers to catch and handle errors in components.
Portals provide a way to render children into a different DOM subtree.
Improved server-side rendering with support for streaming and...
- Q2. Why react hooks are use full?
- Ans.
React hooks simplify state management and lifecycle methods in functional components.
Hooks allow functional components to have state and lifecycle methods
They reduce the need for class components and HOCs
Hooks make code more readable and easier to test
Examples of hooks include useState, useEffect, and useContext
- Q3. What is HOC components?
- Ans.
HOC components are higher-order components in React that allow code reuse and logic sharing.
HOC components are functions that take a component and return a new component with additional functionality.
They are used to abstract common logic and behaviors into reusable components.
HOC components can be used for tasks like authentication, logging, and code reuse.
Example: a withAuth HOC component that adds authentication log...
Skills evaluated in this interview
Interview questions from similar companies
Interview Questionnaire
2 Questions
- Q1. Basics of javascript like Closures, IIFE, Hoisting.
- Q2. React hooks
What people are saying about Wipro
I applied via LinkedIn and was interviewed in Jun 2021. There was 1 interview round.
Interview Questionnaire
4 Questions
- Q1. What is hoisting ?
- Ans.
Hoisting is a JavaScript mechanism where variables and function declarations are moved to the top of their scope.
Variables declared with var are hoisted to the top of their scope
Function declarations are hoisted before variables
Function expressions are not hoisted
Hoisting can lead to unexpected behavior and bugs
- Q2. What is useEffect ?
- Q3. What is function currying
- Ans.
Function currying is a technique of transforming a function that takes multiple arguments into a sequence of functions that each take a single argument.
Currying allows partial application of a function.
It helps in creating reusable functions.
Curried functions are composable and can be easily combined to create new functions.
Currying can be achieved using closures or by using libraries like Lodash or Ramda.
Example: cons...
- Q4. What is closures in js
- Ans.
Closures are functions that have access to variables in their outer scope, even after the outer function has returned.
Closures are created when a function is defined inside another function.
The inner function has access to the outer function's variables and parameters.
Closures can be used to create private variables and methods.
Closures can also be used to create functions with pre-set arguments.
Interview Preparation Tips
Skills evaluated in this interview
I applied via Company Website and was interviewed in May 2021. There were 3 interview rounds.
Interview Questionnaire
4 Questions
- Q1. All basic js concepts
- Q2. Reactjs 16+ questions
- Q3. Nodejs
- Q4. Unit test
Interview Preparation Tips
Reactjs 16+ questions
Nodejs
Jest, enzyme
Interview Questionnaire
2 Questions
- Q1. Let, const, var
- Q2. Redux flow. Spread and Rest operator. before and after in css.
pics formanali
(1 Question)
- Q1. Basics of react, javascript, hooks
I applied via Approached by Company and was interviewed in Apr 2022. There was 1 interview round.
(1 Question)
- Q1. Scenario based and General ReactJS and javascript Questions.
Interview Preparation Tips
- Javascript
- React.Js
- CSS
Selected
I applied via Naukri.com and was interviewed before Aug 2023. There was 1 interview round.
(2 Questions)
- Q1. What is the difference between states and props ?
- Ans.
States are mutable data managed within a component, while props are immutable data passed from parent to child components.
States are managed within a component and can be changed using setState method
Props are passed from parent to child components and are immutable
States are used for internal component data management, while props are used for passing data between components
Example: A counter component may have a stat...
- Q2. How are data passed from children to parents in react component?
- Ans.
Data can be passed from children to parents in React components by using callback functions.
Use callback functions to pass data from child components to parent components
Parent component passes a function as a prop to child component
Child component calls the function with the data as an argument to pass data to parent component
Interview Preparation Tips
- React.Js
- HTML
- CSS
- Javascript
Skills evaluated in this interview
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