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BUSINESSNEXT Reactjs Developer Interview Questions, Process, and Tips

Updated 25 Oct 2023

BUSINESSNEXT Reactjs Developer Interview Experiences

1 interview found

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I was interviewed in Oct 2022.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all Resume tips
Round 2 - Technical 

(2 Questions)

  • Q1. What is webpack
  • Ans. 

    Webpack is a module bundler for JavaScript applications.

    • Webpack takes modules with dependencies and generates static assets representing those modules.

    • It can handle various types of assets like JavaScript, CSS, images, and fonts.

    • Webpack allows for code splitting, lazy loading, and hot module replacement.

    • It has a rich plugin ecosystem to extend its functionality.

    • Commonly used configuration file for webpack is webpack.co

  • Answered by AI
  • Q2. What is the role of babel
  • Ans. 

    Babel is a JavaScript compiler that converts modern JavaScript code into backward-compatible versions for browser compatibility.

    • Babel allows developers to write code using the latest ECMAScript features without worrying about browser support.

    • It transforms JSX syntax used in React components into regular JavaScript.

    • Babel can also be configured to support specific browsers or environments.

    • Plugins can be added to Babel fo

  • Answered by AI
Round 3 - Technical 

(2 Questions)

  • Q1. What is HOC in React
  • Ans. 

    HOC stands for Higher Order Component in React, a pattern where a function takes a component and returns a new component.

    • HOC is a function that takes a component and returns a new component with additional props or functionality.

    • It is used for code reusability, logic abstraction, and cross-cutting concerns like logging, authentication, etc.

    • Example: withAuth HOC can add authentication logic to a component by checking if

  • Answered by AI
  • Q2. What are lifecycle methods in React js
  • Ans. 

    Lifecycle methods in React js are special methods that allow developers to hook into the component lifecycle and perform actions at specific points.

    • componentDidMount() - called after the component is rendered for the first time

    • componentDidUpdate() - called after the component's updates are flushed to the DOM

    • componentWillUnmount() - called before the component is removed from the DOM

  • Answered by AI

Skills evaluated in this interview

Interview questions from similar companies

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

  • Answered by AI
  • Q2. What is useEffect ?
  • Ans. 

    useEffect is a hook in React that allows you to perform side effects in functional components.

    • It replaces componentDidMount, componentDidUpdate, and componentWillUnmount.

    • It takes two arguments: a function that performs the side effect and an array of dependencies.

    • The function is called after every render, unless the dependencies haven't changed.

    • Common use cases include fetching data, setting up event listeners, and upd...

  • Answered by AI
  • 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

  • Answered by AI
  • 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.

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Only a single round which lasted for almost 30 min. It was relatively easy one with basic qns on javascript

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via LinkedIn and was interviewed in Nov 2024. There was 1 interview round.

Round 1 - Coding Test 

React js and JavaScript scenarios based problems.

Interview Preparation Tips

Topics to prepare for TCS Reactjs Developer interview:
  • Javascript
  • React.Js
  • Redux
  • HTML
  • CSS
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. All js concepts.

I applied via Naukri.com and was interviewed in Apr 2022. There was 1 interview round.

Round 1 - Technical 

(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...

  • Answered by AI
  • Q2. Chaining Methods Currying Call bind and apply Optimization of application Server side rendering
  • Q3. Selectors HTML 5 features

Interview Preparation Tips

Interview preparation tips for other job seekers - Interview questions were basic javascript only. He didn't ask anything related to reactjs.
Practice for scope of variables inside and outside of functions

I applied via Naukri.com and was interviewed in Aug 2022. There were 2 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all Resume tips
Round 2 - Technical 

(4 Questions)

  • Q1. What is a single page appliction?
  • Ans. 

    A single page application is a web application that loads once and dynamically updates the content without refreshing the page.

    • Loads once and dynamically updates content

    • No page refreshes

    • Uses JavaScript frameworks like React to handle routing and rendering

    • Improves user experience by providing a seamless and responsive interface

  • Answered by AI
  • Q2. What are the advantages of react?
  • Ans. 

    React provides efficient and flexible UI rendering, component reusability, and easy integration with other libraries.

    • Virtual DOM allows for faster rendering and improved performance

    • Component-based architecture promotes reusability and modularity

    • Easy integration with other libraries and frameworks like Redux and React Native

    • JSX syntax allows for easy creation of complex UI components

    • React community provides a vast array

  • Answered by AI
  • Q3. What is useMemo and its usecases
  • Ans. 

    useMemo is a hook in React that memoizes the result of a function and returns the cached value on subsequent renders.

    • useMemo is used to optimize performance by avoiding unnecessary re-renders.

    • It takes two arguments: a function and an array of dependencies.

    • The function is only re-executed if any of the dependencies change.

    • Common use cases include expensive calculations, filtering, and sorting.

    • Example: useMemo(() => calc

  • Answered by AI
  • Q4. What are functional components
  • Ans. 

    Functional components are a type of React component that are defined as a function rather than a class.

    • They are simpler and easier to read than class components.

    • They don't have state or lifecycle methods.

    • They receive props as an argument and return JSX.

    • They are often used for presentational components.

    • They can use React hooks to manage state and lifecycle.

    • Example: const MyComponent = (props) => { return

      {props.text}
      }

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare allbasics of ReactJs and Hooks.Know well about you project and present with confidence

Skills evaluated in this interview

Reactjs Developer Interview Questions & Answers

TCS user image GATHPA HARSHINI REDDY

posted on 5 Jul 2024

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Job Portal and was interviewed in Jan 2024. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. Difference between let,var and const
  • Ans. 

    let, var, and const are all used for variable declaration in JavaScript, but they have different scopes and behaviors.

    • let has block scope, var has function scope, and const is a constant that cannot be reassigned.

    • Using let allows you to declare variables that are limited to the scope of a block statement.

    • var variables are hoisted to the top of their function scope.

    • const variables must be initialized with a value and ca

  • Answered by AI

Skills evaluated in this interview

Interview experience
2
Poor
Difficulty level
Easy
Process Duration
2-4 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed before Jun 2023. There were 3 interview rounds.

Round 1 - Technical 

(3 Questions)

  • Q1. What is react and tell the advantages of React.
  • Ans. 

    React is a JavaScript library for building user interfaces.

    • Component-based architecture for reusability

    • Virtual DOM for efficient updates

    • One-way data binding for predictable data flow

    • Supports server-side rendering for SEO optimization

  • Answered by AI
  • Q2. What is callback function? What are hooks?
  • Ans. 

    Callback function is a function passed as an argument to another function to be executed later. Hooks are functions that let you use state and other React features without writing a class.

    • Callback function is used to handle asynchronous operations or events in JavaScript.

    • Example: setTimeout function takes a callback function as an argument to execute after a specified time.

    • Hooks are introduced in React 16.8 to allow fu...

  • Answered by AI
  • Q3. From CSS - What is box model?
  • Ans. 

    Box model is a fundamental concept in CSS which defines the spacing and dimensions of an element.

    • The box model consists of content, padding, border, and margin.

    • Content area is where the actual content of the element is displayed.

    • Padding is the space between the content and the border.

    • Border surrounds the padding and content.

    • Margin is the space outside the border, separating the element from other elements.

    • Example: div ...

  • Answered by AI
Round 2 - HR 

(2 Questions)

  • Q1. Can you work in night shift?
  • Q2. Salary negotiation and package details.
Round 3 - Offer letter 

(2 Questions)

  • Q1. Accept or reject offer letter
  • Q2. Confirm joining

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - HR 

(1 Question)

  • Q1. Basic of react.js and css
Interview experience
1
Bad
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
No response

I applied via Recruitment Consulltant and was interviewed in Nov 2023. There were 3 interview rounds.

Round 1 - Coding Test 

Progress bar in react and remote data fetching

Round 2 - Technical 

(1 Question)

  • Q1. Ui related questions
Round 3 - HR 

(1 Question)

  • Q1. Asked for preferred location and salary
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BUSINESSNEXT Interview FAQs

How many rounds are there in BUSINESSNEXT Reactjs Developer interview?
BUSINESSNEXT interview process usually has 3 rounds. The most common rounds in the BUSINESSNEXT interview process are Technical and Resume Shortlist.
How to prepare for BUSINESSNEXT Reactjs Developer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at BUSINESSNEXT. The most common topics and skills that interviewers at BUSINESSNEXT expect are CSS, DOM, HTML, Javascript and React.Js.
What are the top questions asked in BUSINESSNEXT Reactjs Developer interview?

Some of the top questions asked at the BUSINESSNEXT Reactjs Developer interview -

  1. What are lifecycle methods in React...read more
  2. What is the role of ba...read more
  3. What is webp...read more

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