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Tech Mahindra Reactjs Developer Interview Questions and Answers
Tech Mahindra Reactjs Developer Interview Experiences
3 interviews found
Anonymous
(2 Questions)
- Q1. What do you mean by redux and how to use redux
- Ans.
Redux is a predictable state container for JavaScript apps. It helps manage the state of an application in a more organized way.
Redux is a state management tool commonly used with React to manage the state of an application.
It follows a unidirectional data flow, where the state is stored in a single store.
Actions are dispatched to update the state, and reducers specify how the state should change in response to actions...
- Q2. What is the use of Context Api in React
- Ans.
Context API is used in React to pass data through the component tree without having to pass props down manually at every level.
Avoids prop drilling by providing a way to share values like themes, user data, etc. across the component tree.
Helps in managing global state in React applications.
Context API consists of Provider and Consumer components to provide and consume the context data.
Can be used for theming, localizat...
Skills evaluated in this interview
(1 Question)
- Q1. Basic of react.js and css
I applied via Recruitment Consulltant and was interviewed in Oct 2022. There were 3 interview rounds.
(1 Question)
- Q1. First Round is telephonic. Self -introduction, and basics of React js
(1 Question)
- Q1. Second round is video interview. life cycle of react js, dom manipulations, HOC, Redux, React memo, props drilling Javascript: array cloning, object cloning, Data types, Nan
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 Tech Mahindra
I applied via Company Website and was interviewed in Apr 2021. There were 3 interview rounds.
Interview Questionnaire
2 Questions
- Q1. Basic questions
- Q2. Lifecycle, let vs bar, real dom vs shadow dom
Interview Preparation Tips
Even after clearing all round.. they said candidature is closed due to verification didn't match.
Interview Questionnaire
1 Question
- Q1. Asked to write a general reusable form component in Reactjs, fields should be dynamic and inputs to the form should get displayed as table format.
- Ans.
A reusable React form component that dynamically generates fields and displays inputs in a table format.
Use React's state to manage form data dynamically.
Utilize a mapping function to render form fields based on an array of field definitions.
Implement a submit handler to process the form data.
Display the form inputs in a table format using HTML table elements.
Example of field definitions: [{ label: 'Name', type: 'text'...
Interview Questionnaire
6 Questions
- Q1. Coding questions related let ,var and const
- Q2. What is reducer and it's flow
- Ans.
A reducer is a pure function in React that takes the previous state and an action, and returns the new state.
Reducers are used in React to manage state changes in an application
They take the previous state and an action as input
Reducers are pure functions, meaning they do not modify the state directly
They return a new state based on the previous state and the action
Redux is a popular library that uses reducers to manag...
- Q3. What are new features of HTMl5,css positions
- Ans.
New features of HTML5 and CSS positions include flexbox, grid layout, and sticky positioning.
Flexbox allows for easier alignment and distribution of items within a container.
Grid layout enables the creation of complex layouts with rows and columns.
Sticky positioning allows elements to stick to a specific position on the page as the user scrolls.
- Q4. Javascript coding questions-array object
- Q5. Spread operator in react?
- Ans.
Spread operator is used to expand an iterable object into individual elements.
Used for passing props to child components
Used for merging arrays and objects
Syntax: ...
Example: const arr = [1, 2, 3]; const newArr = [...arr, 4, 5];
- Q6. Tel me about
Skills evaluated in this interview
Raj thakur
Selected
I applied via Naukri.com and was interviewed in Jun 2024. There were 3 interview rounds.
(3 Questions)
- Q1. Basic question from React JS, Redux, Javascript, HTML and CSS.
- Q2. Core concept like difference between virtual dom and real dom.
- Ans.
Virtual DOM improves performance by minimizing direct manipulation of the real DOM, enhancing UI updates in React.
Real DOM is the actual representation of the UI in the browser, while Virtual DOM is a lightweight copy kept in memory.
Updating the Real DOM is slow and costly, as it involves reflow and repaint processes in the browser.
Virtual DOM allows React to batch updates and only re-render components that have change...
- Q3. What is Redux and flow of Redux. Difference between context api and Redux.
(2 Questions)
- Q1. Project related questions like what had you done in previous project.
- Q2. Some scenarios based questions.
(1 Question)
- Q1. General HR questions.
Just MCQ questions related to React, Javascript, HTML, CSS
(1 Question)
- Q1. 1. Coding question in JS: Capitalize last letter of each word in a string. 2. React JS: Fetch data from some given API and store data in tabular form
- Ans.
Capitalize last letter of each word in a string and fetch data from API to display in tabular form using React JS.
Split the string into an array of words
Iterate through each word and capitalize the last letter
Join the words back together to form the modified string
Use React JS to fetch data from API and display in a tabular form
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
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