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iEnergizer Front end Developer Interview Questions and Answers

Updated 15 Jan 2025

iEnergizer Front end Developer Interview Experiences

1 interview found

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Naukri.com and was interviewed in Dec 2024. There were 3 interview rounds.

Round 1 - Coding Test 

Coding test was the first round of interview

Round 2 - Technical 

(1 Question)

  • Q1. What is virtual dom in react and what makes it faster ?
Round 3 - One-on-one 

(1 Question)

  • Q1. It was HR round

Interview questions from similar companies

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
-
Result
No response

I applied via Naukri.com and was interviewed in Mar 2024. There was 1 interview round.

Round 1 - Technical 

(3 Questions)

  • Q1. What is reactjs?
  • Ans. 

    ReactJS is a JavaScript library for building user interfaces.

    • ReactJS is developed and maintained by Facebook.

    • It allows developers to create reusable UI components.

    • ReactJS uses a virtual DOM for better performance.

    • It follows a component-based architecture.

    • ReactJS can be used to build single-page applications.

  • Answered by AI
  • Q2. What is call, apply and bind in javascript?
  • Ans. 

    call, apply, and bind are methods in JavaScript used to manipulate the context of a function.

    • call() is used to invoke a function with a specified 'this' value and arguments provided individually.

    • apply() is similar to call() but arguments are passed as an array.

    • bind() is used to create a new function with a specified 'this' value and initial arguments.

  • Answered by AI
  • Q3. Data Types in javascript
  • Ans. 

    JavaScript has several data types including string, number, boolean, object, array, null, and undefined.

    • String: 'hello'

    • Number: 42

    • Boolean: true or false

    • Object: { key: value }

    • Array: [1, 2, 3]

    • Null: null

    • Undefined: undefined

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Good luck

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

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

Round 1 - One-on-one 

(1 Question)

  • Q1. Mostly questions from Domain, JavaScript, Like output based questions of objects, their memory location, reference, one DSA question from recursion, output based questions mostly

Interview Preparation Tips

Interview preparation tips for other job seekers - Focus on basic
Interview experience
1
Bad
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed in Apr 2024. There were 2 interview rounds.

Round 1 - Technical 

(6 Questions)

  • Q1. React hooks and its usage
  • Ans. 

    React hooks are functions that let you use state and other React features without writing a class.

    • Hooks are introduced in React 16.8 to allow state and lifecycle features in functional components.

    • useState() hook is used to add state to functional components.

    • useEffect() hook is used to perform side effects in functional components.

    • Custom hooks can be created to reuse stateful logic across components.

    • Hooks should always ...

  • Answered by AI
  • Q2. Virtual Dom and its use
  • Ans. 

    Virtual DOM is a lightweight copy of the actual DOM, used for efficient updates and rendering in React applications.

    • Virtual DOM is a concept in React where a lightweight copy of the actual DOM is created.

    • It allows React to efficiently update and render components by comparing the virtual DOM with the actual DOM and only making necessary changes.

    • Virtual DOM helps in improving performance by reducing the number of direct...

  • Answered by AI
  • Q3. Redux, middleware and its use
  • Ans. 

    Redux is a state management library for React applications. Middleware is a function that intercepts actions before they reach the reducer.

    • Redux is used to manage the state of a React application in a predictable way

    • Middleware in Redux allows you to write logic that can intercept and modify actions before they reach the reducer

    • Common middleware in Redux includes redux-thunk for async actions and redux-logger for loggin

  • Answered by AI
  • Q4. Call, bind and apply and its application
  • Ans. 

    Call, bind, and apply are methods used to manipulate the context of a function in JavaScript.

    • Call - allows you to call a function with a specified 'this' value and arguments provided individually.

    • Example: function greet(name) { return 'Hello ' + name; } greet.call(null, 'John');

    • Bind - creates a new function that, when called, has its 'this' keyword set to the provided value.

    • Example: const greetJohn = greet.bind(null, '...

  • Answered by AI
  • Q5. 1 coding question in js for flaten array
  • Q6. 1 react questions of todo type questions
Round 2 - Behavioral 

(3 Questions)

  • Q1. Ask about my backend knowledge
  • Q2. Ask about my knowledge in data analytics
  • Q3. Negotiate on basis of above skills not on react

Interview Preparation Tips

Interview preparation tips for other job seekers - RMT Eng. Product Head Rajat Khare is the person in managerial round who try to negotiate because I don't have experience in backend and data analytics. Where I don't mention that I know these skill nor in initial conversation or in technical interview they ask for this, HR is just a postman to communicate. They even ask to come to office to release offer when I ask for match the offer minimum that I have already from a bigger MNC. Just worst way to negotiate.

Skills evaluated in this interview

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

I was interviewed in Jul 2024.

Round 1 - HR 

(2 Questions)

  • Q1. Self introduction
  • Q2. Tell something about your personal experiences
  • Ans. 

    I have gained valuable customer service skills through my previous roles in hospitality.

    • Worked in customer-facing roles in the hospitality industry

    • Handled guest inquiries and resolved issues effectively

    • Received positive feedback from guests for excellent service

    • Trained new staff on customer service best practices

  • Answered by AI
Round 2 - Assignment 

Harvar voice assessment.

Round 3 - One-on-one 

(2 Questions)

  • Q1. Self introduction
  • Q2. Where do you see yourself in next 5 years
  • Ans. 

    In the next 5 years, I see myself growing within the company, taking on more responsibilities, and potentially moving into a managerial role.

    • Continuing to excel in my current role as a Front Office Executive

    • Participating in leadership development programs to enhance my skills

    • Building strong relationships with colleagues and clients to further my career

    • Working towards becoming a Front Office Manager or similar position

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Exude confidence and energy.
Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Naukri.com and was interviewed in May 2024. There was 1 interview round.

Round 1 - Technical 

(3 Questions)

  • Q1. What is Currying
  • Ans. 

    Currying is a technique in functional programming where a function with multiple arguments is transformed into a sequence of nested functions, each taking a single argument.

    • Currying helps in creating reusable functions and partial application.

    • It allows for easier composition of functions.

    • Example: const add = (a) => (b) => a + b; add(2)(3) will return 5.

  • 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 function even after the outer function has finished executing.

    • They help in maintaining state in functional programming.

    • Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction() { console.log(outerVar); }; }

    • Example...

  • Answered by AI
  • Q3. What hooks you are familiar with

Interview Preparation Tips

Topics to prepare for Infosys BPM React Js Frontend Developer interview:
  • React.Js
  • Java script
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Walk-in and was interviewed before Sep 2022. There were 4 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 tips
Round 2 - Aptitude Test 

Skill verifying by department oriented questions.

Round 3 - Technical 

(2 Questions)

  • Q1. About technical related
  • Q2. Query about technical knowledge.
Round 4 - HR 

(1 Question)

  • Q1. Self introduction and mindset of candidate related questions

Interview Preparation Tips

Interview preparation tips for other job seekers - Gain extreme corporate office knowledge but salary is highly low.
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
-
Result
No response

I applied via Naukri.com and was interviewed in Mar 2024. There was 1 interview round.

Round 1 - Technical 

(3 Questions)

  • Q1. What is reactjs?
  • Ans. 

    ReactJS is a JavaScript library for building user interfaces.

    • ReactJS is developed and maintained by Facebook.

    • It allows developers to create reusable UI components.

    • ReactJS uses a virtual DOM for better performance.

    • It follows a component-based architecture.

    • ReactJS can be used to build single-page applications.

  • Answered by AI
  • Q2. What is call, apply and bind in javascript?
  • Ans. 

    call, apply, and bind are methods in JavaScript used to manipulate the context of a function.

    • call() is used to invoke a function with a specified 'this' value and arguments provided individually.

    • apply() is similar to call() but arguments are passed as an array.

    • bind() is used to create a new function with a specified 'this' value and initial arguments.

  • Answered by AI
  • Q3. Data Types in javascript
  • Ans. 

    JavaScript has several data types including string, number, boolean, object, array, null, and undefined.

    • String: 'hello'

    • Number: 42

    • Boolean: true or false

    • Object: { key: value }

    • Array: [1, 2, 3]

    • Null: null

    • Undefined: undefined

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Good luck

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I applied via Walk-in and was interviewed in Jul 2024. There were 2 interview rounds.

Round 1 - Technical 

(2 Questions)

  • Q1. Asked questions on html
  • Q2. Question on Css and javascript
Round 2 - Technical 

(1 Question)

  • Q1. Question on react

Interview Questionnaire 

1 Question

  • Q1. About any experience I have and my family background ,first round HR will check our communication minimum manageble English also fine , second round computer based test this is simple one ,Third round i...

iEnergizer Interview FAQs

How many rounds are there in iEnergizer Front end Developer interview?
iEnergizer interview process usually has 3 rounds. The most common rounds in the iEnergizer interview process are Coding Test, Technical and One-on-one Round.
What are the top questions asked in iEnergizer Front end Developer interview?

Some of the top questions asked at the iEnergizer Front end Developer interview -

  1. what is virtual dom in react and what makes it faste...read more
  2. it was HR ro...read more

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iEnergizer Front end Developer Interview Process

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