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Virtusa Consulting Services React Js Frontend Developer Interview Questions, Process, and Tips
Virtusa Consulting Services React Js Frontend Developer Interview Experiences
1 interview found
I applied via Referral and was interviewed in Feb 2024. There was 1 interview round.
(7 Questions)
- Q1. Types of Promises
- Ans.
Promises in JavaScript are objects representing the eventual completion or failure of an asynchronous operation.
Promises can be in one of three states: pending, fulfilled, or rejected.
Promises can be chained using .then() to handle success and .catch() to handle errors.
Promises can be created using the Promise constructor or by using async/await syntax.
- Q2. Difference between useState and useEffect
- Ans.
useState is used to manage state in functional components, while useEffect is used to perform side effects in functional components.
useState is used to declare state variables in functional components.
useEffect is used to perform side effects in functional components, such as data fetching, subscriptions, or manually changing the DOM.
useState does not trigger re-renders, while useEffect can be used to trigger re-render...
- Q3. What is Callback hell
- Ans.
Callback hell is a situation where multiple nested callbacks make the code difficult to read and maintain.
Occurs when multiple asynchronous operations are nested within each other
Leads to deeply nested code structure which is hard to understand
Can be avoided by using Promises, async/await, or modularizing code
- Q4. Difference between traditional function and arrow function
- Ans.
Traditional functions are defined using the function keyword, while arrow functions are defined using a concise syntax with =>.
Traditional functions are hoisted, while arrow functions are not.
Arrow functions do not have their own 'this' keyword, they inherit it from the parent scope.
Arrow functions are more concise and easier to read compared to traditional functions.
Traditional functions are better for methods in obje...
- Q5. Usecase to create counter in react
- Ans.
Creating a counter in React to increment and decrement a value.
Create a state variable to store the count value
Use setState to update the count value
Render the count value in the component
Add buttons to increment and decrement the count value
- Q6. Program to find frequency of letters in a string
- Ans.
Program to find frequency of letters in a string
Create an object to store the frequency of each letter
Loop through the string and increment the count of each letter in the object
Convert the object into an array of strings with letter and frequency pairs
- Q7. Program to find if substring is present in a given string without using predefined functions
- Ans.
Iterate through the given string to check if the substring is present.
Iterate through the given string and check if each character matches the first character of the substring.
If a match is found, check the subsequent characters to see if they form the substring.
Return true if the entire substring is found within the given string, otherwise return false.
Skills evaluated in this interview
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I applied via Referral and was interviewed in Nov 2024. There was 1 interview round.
(2 Questions)
- Q1. Interviewer was not letting complete my response
- Q2. If i was giving correct response, then he was interrupting and changing the question.
Interview Preparation Tips
React Js Frontend Developer Interview Questions & Answers
Publicis Sapient
Anonymous
posted on 4 Oct 2024
I applied via Approached by Company and was interviewed in Sep 2024. There was 1 interview round.
(2 Questions)
- Q1. What is the difference between debounce and throttling
- Ans.
Debounce delays the execution of a function until after a specified time period, while throttling limits the rate at which a function can be executed.
Debounce waits for a specified time period of inactivity before executing the function, while throttling limits the rate at which the function can be called.
Debounce is useful for scenarios like search bars where you want to wait for the user to finish typing before makin...
- Q2. What was used before Rest APIs
- Ans.
SOAP (Simple Object Access Protocol) was used before Rest APIs for web services communication.
SOAP was a protocol for exchanging structured information in the implementation of web services.
SOAP used XML for message format and relied heavily on HTTP for communication.
SOAP was more rigid and complex compared to Rest APIs, which are more lightweight and flexible.
Examples of SOAP-based web services include Microsoft's .NE
Skills evaluated in this interview
React Js Frontend Developer Interview Questions & Answers
GlobalLogic
Anonymous
posted on 4 May 2024
I applied via Approached by Company and was interviewed in Apr 2024. There were 3 interview rounds.
(1 Question)
- Q1. Object , array , ES6, React basics
(2 Questions)
- Q1. Advance Javascript questions
- Q2. React application with custom hooks
- Ans.
Custom hooks in React allow for reusable logic across components.
Custom hooks are functions that use React hooks internally and can be reused across multiple components.
They can encapsulate complex logic and state management, making components more modular and easier to maintain.
Example: A custom hook for fetching data from an API and handling loading and error states can be used in multiple components.
Example: A custo...
(1 Question)
- Q1. Roles & Responsibilites
Skills evaluated in this interview
I applied via Recruitment Consulltant and was interviewed in Jul 2024. There was 1 interview round.
(2 Questions)
- Q1. Basic React question
- Q2. Few Javascript questions
Pooja Thakur
(1 Question)
- Q1. Tell me about your self
What is react , feature, axios, API
Redux Redux toolkit Redux thunk
Interview Preparation Tips
I applied via Naukri.com and was interviewed in Oct 2024. There was 1 interview round.
(3 Questions)
- Q1. Redux related questions
- Q2. Css positioning including flex
- Q3. Authorisation and authentication
Frontend Developer Intern Interview Questions & Answers
DXC Technology
Anonymous
posted on 26 Oct 2024
Time base directions and probability
(2 Questions)
- Q1. Self-introduction of yourself
- Q2. Job description of the company why you need tp work in this company
Interview Preparation Tips
(1 Question)
- Q1. 1) State and props 2) Basic JS question
React Js Frontend Developer Interview Questions & Answers
Publicis Sapient
Anonymous
posted on 3 Jan 2025
I applied via Naukri.com and was interviewed in Jul 2024. There was 1 interview round.
(2 Questions)
- Q1. Uncontrolled components
- Q2. Why to use uncontrolled components instead of controlled
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