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SUMAGO INFOTECH Reactjs Developer Interview Questions and Answers
SUMAGO INFOTECH Reactjs Developer Interview Experiences
1 interview found
Anonymous
I applied via LinkedIn and was interviewed in Sep 2023. There were 2 interview rounds.
The aptitute test was of around 40 minutes with 40 aptitude questions, the questions included various topics from quantitative aptitude , logical reasoning and programing (C++ ,java ,JavaScript ,python)
(1 Question)
- Q1. The technical round was an online interview on meet , there was one person on the other end , she asked me various questions about the reactjs from class based components, props, state in react and from t...
Interview Preparation Tips
Top trending discussions
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
- 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. Basics of javascript like Closures, IIFE, Hoisting.
- Q2. React hooks
Interview Questionnaire
2 Questions
- Q1. Let, const, var
- Q2. Redux flow. Spread and Rest operator. before and after in css.
(1 Question)
- Q1. What is Pure components/memo/useCallback/HoC
- Ans.
Pure components, memo, useCallback, and HoC are optimization techniques in React for improving performance.
Pure components are components that only re-render when their props or state change.
memo is a higher order component that memoizes the result of a component rendering, preventing unnecessary re-renders.
useCallback is a hook that memoizes functions, preventing unnecessary re-creations on re-renders.
HoC (Higher Orde...
(2 Questions)
- Q1. React basic,event loop, Lazy Loading, Suspense, Javascript basics
- Q2. Create counter application
- Ans.
Counter application using Reactjs
Create a React component for the counter
Use state to keep track of the count
Implement functions to increment and decrement the count
Display the count on the screen
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
I applied via Naukri.com and was interviewed in Apr 2022. There was 1 interview round.
(1 Question)
- Q1. I gave technical interview with Accenture for react js developer. They asked questions majorly related to software development like session storage, Server side rendering Url Constructor Saas Web workers...
Interview Preparation Tips
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
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