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Deloitte Front end Developer Interview Questions, Process, and Tips

Updated 8 Feb 2025

Top Deloitte Front end Developer Interview Questions and Answers

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Deloitte Front end Developer Interview Experiences

10 interviews found

Front end Developer Interview Questions & Answers

user image Biswojit Nayak

posted on 8 Feb 2025

Interview experience
2
Poor
Difficulty level
Moderate
Process Duration
-
Result
No response

I was interviewed in Jan 2025.

Round 1 - Technical 

(5 Questions)

  • Q1. Hoisting concept with examples and guess the output
  • Ans. 

    Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope.

    • Variable declarations are hoisted but not their initializations.

    • Function declarations are fully hoisted.

    • Example: console.log(myVar); var myVar = 10; // Output: undefined

    • Example: console.log(myFunc()); function myFunc() { return 'Hello!'; } // Output: Hello!

  • Answered by AI
  • Q2. Map functionality with a call back function
  • Ans. 

    Using map function to apply a callback function to each element in an array

    • Map function is used to iterate over an array and apply a callback function to each element

    • The callback function can perform operations on each element and return a new value

    • Example: arr.map(item => item * 2) will double each element in the array

  • Answered by AI
  • Q3. Copy object, spread operator usage . Deep copy, sallow copy
  • Q4. Flexbox vs grid, dom, box model,
  • Ans. 

    Flexbox is best for one-dimensional layouts, Grid is best for two-dimensional layouts, DOM is the structure of a webpage, Box model is the layout of elements.

    • Flexbox is best for creating one-dimensional layouts like navigation bars or sidebars.

    • Grid is best for creating two-dimensional layouts like grids of images or cards.

    • DOM (Document Object Model) is the structure of a webpage, representing the elements as objects.

    • Bo...

  • Answered by AI
  • Q5. React optimization, why React,
Interview experience
4
Good
Difficulty level
Easy
Process Duration
2-4 weeks
Result
Not Selected

I was interviewed in Jan 2025.

Round 1 - Technical 

(2 Questions)

  • Q1. What are semantic elements in HTML?
  • Q2. Difference between html5 and html?
Round 2 - Technical 

(1 Question)

  • Q1. How to pass data in components using Vue js and react js?

Front end Developer Interview Questions Asked at Other Companies

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asked in JUSPAY
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Q5. Sort Linked List Based on Actual Values You are given a Singly Li ... read more
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(2 Questions)

  • Q1. JavaScript Related Questions
  • Q2. ReactJs Related Questions
Round 2 - One-on-one 

(2 Questions)

  • Q1. Reactjs Use Effects and UseRef
  • Q2. JavaScript Closures,Map,CallBack

Interview Preparation Tips

Interview preparation tips for other job seekers - NA
Interview experience
3
Average
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Referral and was interviewed in Oct 2024. There was 1 interview round.

Round 1 - One-on-one 

(2 Questions)

  • Q1. What are closures with examples ?
  • 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.

    • Closures are commonly used in event handlers and callbacks.

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

  • Answered by AI
  • Q2. How to get updated content on scroll on e-commerce app?
  • Ans. 

    Use infinite scrolling to fetch new content as user scrolls down the page.

    • Implement infinite scrolling to load more products as user scrolls down

    • Make AJAX calls to fetch new content from the server

    • Update the DOM with the new content dynamically

  • Answered by AI

Skills evaluated in this interview

Deloitte interview questions for designations

 Senior Front end Developer

 (2)

 Software Developer

 (42)

 Java Developer

 (21)

 Salesforce Developer

 (19)

 Application Developer

 (4)

 Servicenow Developer

 (3)

 Web Developer

 (3)

 Python Developer

 (3)

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
-

I applied via Walk-in and was interviewed in Apr 2024. There were 3 interview rounds.

Round 1 - Coding Test 

Javascript array questions like palindrom and others with aptitude

Round 2 - Technical 

(4 Questions)

  • Q1. Skill related technical questions
  • Q2. How to share data in components react
  • Ans. 

    Data can be shared between components in React using props, context, or state management libraries like Redux.

    • Use props to pass data from parent to child components

    • Use context to share data across multiple components without passing props manually

    • Use state management libraries like Redux to manage global state and share data between components

  • Answered by AI
  • Q3. Prop drilling explain in react
  • Ans. 

    Prop drilling is the process of passing data through multiple levels of components in React.

    • Prop drilling occurs when a component needs to pass data to a deeply nested child component.

    • It can lead to code that is hard to maintain and understand.

    • One way to avoid prop drilling is by using Context API or Redux for state management.

  • Answered by AI
  • Q4. Redux flow explain
  • Ans. 

    Redux is a predictable state container for JavaScript apps.

    • Redux stores the entire state of an application in a single immutable object.

    • State changes are made by dispatching actions, which are plain JavaScript objects.

    • Reducers specify how the application's state changes in response to actions.

    • Redux flow: Action -> Reducer -> Store -> View

  • Answered by AI
Round 3 - Behavioral 

(1 Question)

  • Q1. Previous project discussion

Interview Preparation Tips

Interview preparation tips for other job seekers - Clear the basics of react or angular and redux also.

Skills evaluated in this interview

Get interview-ready with Top Deloitte Interview Questions

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

(1 Question)

  • Q1. HTML CSS JS Angular React Questions
Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
2-4 weeks
Result
Not Selected

I applied via Naukri.com

Round 1 - Technical 

(4 Questions)

  • Q1. Javascipt question
  • Q2. Promises, filter, map, What is single page , mulitple page application, opened google page by search for one product in that using console filter it only for sony products only
  • Q3. What is DOM, what is the use of that
  • Ans. 

    DOM stands for Document Object Model, it is a programming interface for web documents. It represents the structure of a document as a tree of objects.

    • DOM is used to interact with HTML and XML documents in a structured way

    • It allows developers to manipulate the content, structure, and style of a website dynamically

    • DOM provides methods and properties to access and modify elements on a web page

    • Example: document.getElementB...

  • Answered by AI
  • Q4. What is the output if u type document in console
  • Ans. 

    The output will display the document object in the console.

    • Typing 'document' in the console will return the document object, which represents the current HTML document.

    • The document object provides access to the content and structure of the webpage, allowing manipulation of elements and properties.

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Fundamental knowledge on javascript is much important

Skills evaluated in this interview

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

(1 Question)

  • Q1. Tell me about yourself

Front end Developer Interview Questions & Answers

user image mohammed nizamuddin gm

posted on 30 Jun 2024

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

(2 Questions)

  • Q1. How to handle error in javascript
  • Ans. 

    Error handling in JavaScript involves using try-catch blocks, throwing custom errors, and using error objects.

    • Use try-catch blocks to catch and handle errors

    • Throw custom errors using the throw keyword

    • Use error objects like Error, SyntaxError, TypeError, etc. for specific types of errors

  • Answered by AI
  • Q2. Explain closure
  • Ans. 

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

    • Closure allows a function to access and manipulate variables from its outer scope.

    • It forms a 'closed-over' scope that persists even after the outer function has finished executing.

    • Closures are commonly used in event handlers, callbacks, and asynchronous code.

    • Example: function outerFunction(...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Learn Basic javascript question along with project knowledge

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I was interviewed in Feb 2024.

Round 1 - Coding Test 

2 moderate DSA questions and a Question on React on Api's to fetch data

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare DSA when you are appearing for Big4 and theory conceps when you attend for MNC's

Deloitte Interview FAQs

How many rounds are there in Deloitte Front end Developer interview?
Deloitte interview process usually has 1-2 rounds. The most common rounds in the Deloitte interview process are Technical, One-on-one Round and Coding Test.
How to prepare for Deloitte Front end 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 Deloitte. The most common topics and skills that interviewers at Deloitte expect are Javascript, Front End, Typescript, CSS and Cloud Services.
What are the top questions asked in Deloitte Front end Developer interview?

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

  1. How to pass data in components using Vue js and react ...read more
  2. how to get updated content on scroll on e-commerce a...read more
  3. what is the output if u type document in cons...read more

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Deloitte Front end Developer Interview Process

based on 12 interviews

1 Interview rounds

  • Technical Round
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Deloitte Front end Developer Salary
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₹3.8 L/yr - ₹17.1 L/yr
62% more than the average Front end Developer Salary in India
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3.9/5

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