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ITC Infotech Reactjs Developer Interview Questions and Answers

Updated 24 Sep 2024

ITC Infotech Reactjs Developer Interview Experiences

2 interviews found

Reactjs Developer Interview Questions & Answers

user image Harsh Khandelwal

posted on 24 Sep 2024

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

Dsa question were asked

Round 2 - Aptitude Test 

Question related to profit loss

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. What is Event loop
  • Ans. 

    Event loop is a mechanism in JavaScript that allows for asynchronous operations to be executed in a non-blocking way.

    • Event loop is responsible for handling asynchronous operations in JavaScript.

    • It allows for non-blocking execution of code by moving asynchronous tasks to the event queue.

    • Event loop continuously checks the call stack and the event queue, moving tasks from the queue to the stack when the stack is empty.

    • Exa...

  • Answered by AI
  • Q2. What are closures
  • Ans. 

    Closures are functions that have access to their own scope, as well as the scope in which they were defined.

    • Closures allow functions to access variables from their outer scope even after the outer function has finished executing.

    • They are commonly used to create private variables in JavaScript.

    • Closures are created whenever a function is defined within another function.

  • Answered by AI

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Interview questions from similar companies

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.

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...

  • Answered by AI
  • 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

  • Answered by AI
  • 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

  • Answered by AI

Skills evaluated in this interview

I applied via Naukri.com and was interviewed in Aug 2021. There were 4 interview rounds.

Interview Questionnaire 

5 Questions

  • Q1. Html - Form, meta tags
  • Q2. Css - Grid box.
  • Q3. How do you make a page responsive. Bootstrap layouts and alerts
  • Ans. 

    To make a page responsive, use Bootstrap layouts and alerts.

    • Use Bootstrap's grid system to create responsive layouts

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

    • Use Bootstrap's responsive utility classes to hide/show elements on different devices

    • Use Bootstrap's responsive navigation components for mobile-friendly menus

    • Use Bootstrap's responsive images to ensure they scale properly

    • Use Bootstrap's responsiv...

  • Answered by AI
  • Q4. Javascript array based questions
  • Q5. Questions from redux, hook, use state, UseEffect

Interview Preparation Tips

Interview preparation tips for other job seekers - I had a call from Accenture HR asking my interest for the role. Three rounds - 1st is mcq which had 30 questions for 35min. Moderate to tough.
Second round is technical interview, took around 2 hours. Totally exhausted after 1st hour. Interviewer asked to write few codes in the live code share screen. The process is completed in a week

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
No response

I applied via Recruitment Consulltant and was interviewed in Sep 2024. There was 1 interview round.

Round 1 - Technical 

(16 Questions)

  • Q1. What is hosting and closer
  • Ans. 

    Hosting is the process of storing a website or application on a server, while closure is a function that retains access to variables from its parent scope.

    • Hosting involves storing a website or application on a server to make it accessible on the internet.

    • Closure is a function that retains access to variables from its parent scope, even after the parent function has finished executing.

  • Answered by AI
  • Q2. What is difference between var let and const give me an explanation on what block scope
  • Ans. 

    var, let, and const are used to declare variables in JavaScript. var has function scope, let has block scope, and const is a constant with block scope.

    • var has function scope, meaning it is accessible throughout the function it is declared in.

    • let has block scope, meaning it is only accessible within the block it is declared in.

    • const is similar to let in terms of block scope, but the value cannot be reassigned.

  • Answered by AI
  • Q3. What is asynchronous and how it works
  • Ans. 

    Asynchronous programming allows tasks to run independently of the main program flow, improving performance and responsiveness.

    • Asynchronous code does not block the main thread, allowing other tasks to continue while waiting for a response.

    • Callbacks, promises, and async/await are common ways to handle asynchronous operations in JavaScript.

    • Example: fetching data from an API while the rest of the application continues to r

  • Answered by AI
  • Q4. Tell me the output 1)a = 20; console.log(a); var a; 2)b=10; console.log(b); let b; 3)let a =5; if(a<5){ let b = " a lessthen 5"; }else{ let b = "b is grater then 5"; } console.log(b);
  • Ans. 

    The output for the given code snippets will be: 1) 20 2) ReferenceError: Cannot access 'b' before initialization 3) ReferenceError: b is not defined

    • In the first snippet, variable 'a' is declared using 'var' after it is assigned a value, so it logs 20 without any issues.

    • In the second snippet, variable 'b' is declared using 'let' after it is assigned a value, so it throws a ReferenceError as 'b' is accessed before initia...

  • Answered by AI
  • Q5. Give a div with text and display center of the page and apply animation using HTML and css
  • Ans. 

    Use HTML and CSS to center a div with text and apply animation

    • Create a div element with text inside

    • Apply CSS to center the div on the page using flexbox or margin auto

    • Use CSS animations like keyframes to add animation effects

  • Answered by AI
  • Q6. What are semantic tags and explain
  • Ans. 

    Semantic tags are HTML tags that provide meaning to the content they enclose, helping search engines and screen readers understand the structure of a webpage.

    • Semantic tags help improve SEO by providing context to search engines.

    • They also improve accessibility for screen readers by clearly defining the structure of a webpage.

    • Examples of semantic tags include

      ,
      ,

  • Answered by AI
  • Q7. How can we write responsive for web page
  • Ans. 

    Use media queries, flexible grids, and relative units to create a responsive web page.

    • Use media queries to apply different styles based on screen size

    • Create flexible grids using CSS Grid or Flexbox

    • Use relative units like percentages or ems for sizing elements

    • Consider using frameworks like Bootstrap or Material-UI for responsive design

    • Test your design on different devices and screen sizes

  • Answered by AI
  • Q8. What is the difference between CSS and SASS? what is the use of Sass
  • Ans. 

    SASS is a preprocessor scripting language that is interpreted into CSS, offering more features and flexibility.

    • SASS is a preprocessor for CSS, allowing for variables, nesting, and mixins to be used in stylesheets.

    • SASS code needs to be compiled into CSS before being used in a web project.

    • SASS helps in writing cleaner and more organized CSS code, making it easier to maintain and update styles.

    • CSS is the styling language ...

  • Answered by AI
  • Q9. Event propagation
  • Q10. How would you validate the form using HTML? How do you validate the phone number with the country code?
  • Ans. 

    Form validation using HTML and validating phone number with country code

    • Use HTML5 form validation attributes like 'required', 'pattern', 'minlength', etc.

    • For phone number validation, use 'pattern' attribute with regex for specific country code format

    • Example: <input type='tel' pattern='[0-9]{3}-[0-9]{3}-[0-9]{4}' required>

  • Answered by AI
  • Q11. Which test library you use why it usecase
  • Ans. 

    I use Jest for testing React applications due to its simplicity and integration with React ecosystem.

    • Jest is the most popular test library for React applications

    • It comes pre-configured with Create React App and has great support for snapshot testing

    • Jest also has built-in mocking capabilities which make it easy to test components with dependencies

  • Answered by AI
  • Q12. Tell me mounting and shallow concept in testing library
  • Ans. 

    Mounting is the process of rendering a component into the DOM, while shallow rendering allows testing a component without rendering its children.

    • Mounting is the initial phase of the component lifecycle where the component is rendered into the DOM.

    • Shallow rendering in testing library renders only the component itself, not its children.

    • Shallow rendering is useful for isolating the component being tested and avoiding rend...

  • Answered by AI
  • Q13. What is redux-toolkit and what difference b/w redux and redux-toolkit
  • Ans. 

    Redux Toolkit is the official, recommended way to write Redux logic. It simplifies the process of managing state in React applications.

    • Redux Toolkit provides a set of tools and best practices to streamline Redux development.

    • It includes utilities like createSlice, createReducer, and configureStore to simplify the code and reduce boilerplate.

    • Redux Toolkit also includes built-in Immer integration for writing immutable upd...

  • Answered by AI
  • Q14. How api call handle in redux and how can you get and display user name from redux
  • Ans. 

    API calls in Redux are typically handled using middleware like Redux Thunk. User name can be retrieved from Redux state and displayed in components.

    • Use Redux Thunk middleware to make API calls in Redux

    • Dispatch actions to update Redux state with API response data

    • Access user name from Redux state in components to display it

  • Answered by AI
  • Q15. React hooks and how optimization
  • Q16. Why we need thank in redux
  • Ans. 

    Thunk middleware in Redux allows for asynchronous logic to be handled in Redux actions.

    • Thunk middleware allows for dispatching functions instead of just plain objects in Redux actions.

    • It enables handling asynchronous API calls within Redux actions.

    • Thunk middleware helps in simplifying the code by moving complex logic outside of components.

    • Example: Thunk middleware can be used to dispatch an action after a delay or to f...

  • Answered by AI

Skills evaluated in this interview

Reactjs Developer Interview Questions & Answers

LTIMindtree user image Abdul Munaf Mohammed

posted on 15 Oct 2024

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(3 Questions)

  • Q1. React VirtualDOM
  • Q2. ReactJS questions
  • Q3. Inline vs block
  • Ans. 

    Inline elements flow in the same line, while block elements take up the full width available.

    • Inline elements do not start on a new line and only take up as much width as necessary.

    • Block elements start on a new line and take up the full width available.

    • Examples of inline elements include <span>, <a>, and <strong>.

    • Examples of block elements include <div>, <p>, and <h1>.

  • Answered by AI

Skills evaluated in this interview

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
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - HR 

(1 Question)

  • Q1. Questions related to Current Job Profile and previous experience
Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. Basics of react, javascript, hooks
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ITC Infotech Interview FAQs

How many rounds are there in ITC Infotech Reactjs Developer interview?
ITC Infotech interview process usually has 1-2 rounds. The most common rounds in the ITC Infotech interview process are Technical, Coding Test and Aptitude Test.
How to prepare for ITC Infotech 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 ITC Infotech . The most common topics and skills that interviewers at ITC Infotech expect are Backend, Front End, Debugging, HTML and Javascript.
What are the top questions asked in ITC Infotech Reactjs Developer interview?

Some of the top questions asked at the ITC Infotech Reactjs Developer interview -

  1. What is Event l...read more
  2. What are closu...read more

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ITC Infotech Reactjs Developer Interview Process

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