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Head Digital Works Front end Developer Interview Questions and Answers

Updated 22 Dec 2024

Head Digital Works Front end Developer Interview Experiences

1 interview found

Interview experience
1
Bad
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

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

Round 1 - One-on-one 

(2 Questions)

  • Q1. All related to domain javascript/react,
  • Q2. Fallback in lazy loading,optimization techniques/for API call
  • Ans. 

    Fallback in lazy loading is important for optimizing API calls to ensure a smooth user experience.

    • Implementing a loading spinner or placeholder while content is being loaded asynchronously

    • Using a default value or cached data if the API call fails

    • Implementing error handling to gracefully handle any issues with the API call

  • Answered by AI

Interview questions from similar companies

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

(1 Question)

  • Q1. Promises and Debounce
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

First round was a coding question with html, css, javascript to create 5 clickable boxes, change it's colors on click and update count

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

I applied via LinkedIn and was interviewed in Dec 2022. There were 3 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 Resume tips
Round 2 - Technical 

(2 Questions)

  • Q1. Asked about fundamentals of javascript and react
  • Q2. React lifecycle in functional components
  • Ans. 

    React lifecycle in functional components

    • useEffect hook replaces lifecycle methods

    • useEffect runs after every render by default

    • useEffect can be controlled by dependencies array

    • useEffect cleanup function can be used to clean up effects

    • useLayoutEffect hook runs synchronously after DOM mutations

  • Answered by AI
Round 3 - Coding Test 

Return numbers in array equal to sum

Interview Preparation Tips

Interview preparation tips for other job seekers - better understanding of javascript fundamentals and react

Skills evaluated in this interview

I was interviewed in Sep 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 45 Minutes
Round difficulty - Easy

  • Q1. 

    Triplets with Given Sum Problem

    Given an array or list ARR consisting of N integers, your task is to identify all distinct triplets within the array that sum up to a specified number K.

    Explanation:

    A t...

  • Ans. 

    The task is to identify all distinct triplets within an array that sum up to a specified number.

    • Iterate through the array and use nested loops to find all possible triplets.

    • Check if the sum of the triplet equals the specified number.

    • Print the valid triplets or return -1 if no such triplet exists.

  • Answered by AI
  • Q2. 

    Find Magic Index in Sorted Array

    Given a sorted array A consisting of N integers, your task is to find the magic index in the given array, where the magic index is defined as an index i such that A[i] = i...

  • Ans. 

    Find the magic index in a sorted array where A[i] = i.

    • Iterate through the array and check if A[i] = i for each index i.

    • Since the array is sorted, you can optimize the search using binary search.

    • Return the index if found, else return -1.

  • Answered by AI
Round 2 - Video Call 

(3 Questions)

Round duration - 50 Minutes
Round difficulty - Hard

  • Q1. 

    Alien Dictionary Problem Statement

    You are provided with a sorted dictionary (by lexical order) in an alien language. Your task is to determine the character order of the alien language from this dictiona...

  • Ans. 

    Given a sorted alien dictionary in an array of strings, determine the character order of the alien language.

    • Iterate through the words in the dictionary to build a graph of character dependencies.

    • Perform a topological sort on the graph to determine the character order.

    • Return the character array representing the order of characters in the alien language.

  • Answered by AI
  • Q2. 

    Jumping Numbers Problem Statement

    Given a positive integer N, your goal is to find all the Jumping Numbers that are smaller than or equal to N.

    A Jumping Number is one where every adjacent digit has an a...

  • Ans. 

    Find all Jumping Numbers smaller than or equal to a given positive integer N.

    • Iterate through numbers from 0 to N and check if each number is a Jumping Number.

    • For each number, check if the absolute difference between adjacent digits is 1.

    • Include all single-digit numbers as Jumping Numbers.

    • Output the list of Jumping Numbers that are smaller than or equal to N.

  • Answered by AI
  • Q3. 

    Matching Prefix Problem Statement

    Given an integer N representing the number of strings in an array Arr composed of lowercase English alphabets, determine a string S of length N such that it can be used t...

  • Ans. 

    Given an array of strings, find the lexicographically smallest string that can be used as a prefix to minimize the total cost of deleting prefixes from the strings.

    • Iterate through the array to find the common prefix among all strings

    • Choose the lexicographically smallest common prefix

    • Delete the common prefix from each string in the array to minimize the total cost

  • Answered by AI
Round 3 - HR 

Round duration - 20 Minutes
Round difficulty - Easy

Interview Preparation Tips

Professional and academic backgroundI applied for the job as Frontend Developer in NoidaEligibility criteriaNo critertiaInfo Edge India (Naukri.com) interview preparation:Topics to prepare for the interview - Data Structure, Algorithms, JavaScript, HTML/CSS, ReactTime required to prepare for the interview - 3 monthsInterview preparation tips for other job seekers

Tip 1 : Be consistent, practice regularly whatever you read/study.
Tip 2 : Apply what you learn through code.

Application resume tips for other job seekers

Tip 1 : Have some projects on your resume.
Tip 2 : If you have an internship or training explain it in a proper way like what are the techniques you learned during your training.

Final outcome of the interviewSelected

Skills evaluated in this interview

I applied via Naukri.com and was interviewed in Nov 2021. There was 1 interview round.

Interview Questionnaire 

1 Question

  • Q1. Html, cas, java

Interview Preparation Tips

Interview preparation tips for other job seekers - Clear voice and give some options
Interview experience
5
Excellent
Difficulty level
-
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Naukri.com and was interviewed in May 2024. There were 2 interview rounds.

Round 1 - Technical 

(2 Questions)

  • Q1. Questions on optimizations
  • Q2. Question on React Js
Round 2 - Coding Test 

Medium level DSA question in JS

I was interviewed before Feb 2021.

Round 1 - Coding Test 

(3 Questions)

Round duration - 90 minutes
Round difficulty - Medium

Questions on aptitude, English, logical reasoning, C/C++ and 5 coding ques. (only pseudo code).

  • Q1. 

    Minimum Jumps Problem Statement

    Bob and his wife are in the famous 'Arcade' mall in the city of Berland. This mall has a unique way of moving between shops using trampolines. Each shop is laid out in a st...

  • Ans. 

    Find the minimum number of trampoline jumps Bob needs to make to reach the final shop, or return -1 if it's impossible.

    • Use Breadth First Search (BFS) algorithm to find the minimum number of jumps required.

    • Keep track of the visited shops to avoid revisiting them.

    • If a shop has an Arr value of 0, it is impossible to reach the final shop.

    • Return -1 if the final shop cannot be reached.

  • Answered by AI
  • Q2. 

    Smallest Window Problem Statement

    Given two strings, S and X, your task is to find the smallest substring in S that contains all the characters present in X.

    Example:

    Input:
    S = "abdd", X = "bd"
    Outpu...
  • Ans. 

    Find the smallest substring in S that contains all characters in X.

    • Use a sliding window approach to find the smallest window in S containing all characters of X.

    • Maintain a hashmap to keep track of characters in X and their frequencies in the current window.

    • Slide the window to the right, updating the hashmap and shrinking the window until all characters in X are present.

    • Return the smallest window found.

    • Example: S = 'abd

  • Answered by AI
  • Q3. 

    Rat in a Maze Problem Statement

    You need to determine all possible paths for a rat starting at position (0, 0) in a square maze to reach its destination at (N-1, N-1). The maze is represented as an N*N ma...

  • Ans. 

    Find all possible paths for a rat in a maze from start to destination.

    • Use backtracking to explore all possible paths in the maze.

    • Keep track of visited cells to avoid revisiting them.

    • Return paths in alphabetical order as a list of strings.

  • Answered by AI
Round 2 - Face to Face 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Easy

Questions based on OOPS were asked in this round.

  • Q1. What is a virtual function?
  • Ans. 

    A virtual function is a function in a base class that is declared using the keyword 'virtual' and can be overridden by a function with the same signature in a derived class.

    • Virtual functions allow for dynamic polymorphism in C++

    • They are used in inheritance to achieve runtime polymorphism

    • Virtual functions are declared in a base class and can be overridden in derived classes

    • They are called based on the type of object bei...

  • Answered by AI
  • Q2. What are the types of polymorphism in Object-Oriented Programming?
  • Ans. 

    Types of polymorphism in OOP include compile-time (method overloading) and runtime (method overriding) polymorphism.

    • Compile-time polymorphism is achieved through method overloading, where multiple methods have the same name but different parameters.

    • Runtime polymorphism is achieved through method overriding, where a subclass provides a specific implementation of a method that is already defined in its superclass.

    • Polymor...

  • Answered by AI
  • Q3. What is the difference between deep copy and shallow copy?
  • Ans. 

    Deep copy creates a new object and recursively copies all nested objects, while shallow copy creates a new object and copies only the references to nested objects.

    • Deep copy creates a new object and copies all nested objects, while shallow copy creates a new object and copies only the references to nested objects.

    • In deep copy, changes made to the original object do not affect the copied object, while in shallow copy, ch...

  • Answered by AI
Round 3 - HR 

Round duration - 30 minutes
Round difficulty - Easy

HR round with typical behavioral problems.

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAMakeMyTrip interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 5 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewSelected

Skills evaluated in this interview

I was interviewed before Feb 2021.

Round 1 - Coding Test 

(1 Question)

Round duration - 65 minutes
Round difficulty - Easy

There were 2 sections – 
Aptitude and Logical Reasoning and MCQ based on Java question ,C++, coding for 20 min and 45 min respectively.
Section A- Not very difficult to clear this round although less time was a problem.
Section B- It contains 15 multiple choice question on c/c++,java and 4 simple coding questions

  • Q1. 

    Cycle Detection in a Singly Linked List

    Determine if a given singly linked list of integers forms a cycle or not.

    A cycle in a linked list occurs when a node's next points back to a previous node in the ...

  • Ans. 

    Detect if a singly linked list forms a cycle by checking if a node's next pointer points back to a previous node.

    • Traverse the linked list using two pointers, one moving at double the speed of the other.

    • If the two pointers meet at any point, there is a cycle in the linked list.

    • Use Floyd's Cycle Detection Algorithm for O(N) time complexity and O(1) space complexity.

  • Answered by AI
Round 2 - Coding Test 

(3 Questions)

Round duration - 75 minutes
Round difficulty - Medium

It was an online coding test in which 3 coding question were given.

  • Q1. 

    Smallest Window Problem Statement

    Given two strings, S and X, your task is to find the smallest substring in S that contains all the characters present in X.

    Example:

    Input:
    S = "abdd", X = "bd"
    Outpu...
  • Ans. 

    Find the smallest substring in string S that contains all characters in string X.

    • Iterate through string S and keep track of characters in X found in a window

    • Use two pointers to maintain the window and slide it to find the smallest window

    • Return the smallest window containing all characters in X

  • Answered by AI
  • Q2. 

    Smallest Integer Not Representable as Subset Sum

    Given a non-decreasing sorted array ARR of N positive numbers, determine the smallest positive integer that cannot be expressed as the sum of elements from...

  • Ans. 

    Find the smallest positive integer that cannot be expressed as the sum of elements from any proper subset of a non-decreasing sorted array of positive numbers.

    • Start with the smallest possible integer that cannot be represented, which is 1.

    • Iterate through the array and update the smallest integer that cannot be represented.

    • If the current element is greater than the smallest integer that cannot be represented, return tha...

  • Answered by AI
  • Q3. 

    Minimum Steps for a Knight to Reach Target

    Given a square chessboard of size 'N x N', determine the minimum number of moves a Knight requires to reach a specified target position from its initial position...

  • Ans. 

    Calculate the minimum number of moves a Knight needs to reach a target position on a chessboard.

    • Implement a function that takes knight's starting position, target position, and chessboard size as input

    • Use breadth-first search algorithm to find the shortest path for the Knight

    • Consider all possible 8 movements of the Knight on the chessboard

    • Return the minimum number of moves required for the Knight to reach the target po

  • Answered by AI
Round 3 - Face to Face 

(4 Questions)

Round duration - 60 minutes
Round difficulty - Easy

It started with a discussion on the programs given in coding round. They asked me about my interest field after that they directly jumped into Networking, Linux and Ethical Hacking part looking my interest domain. They asked me various question on networking and linux.
Then they asked me to code a simple c program

  • Q1. 

    Reverse Linked List Problem Statement

    Given a singly linked list of integers, return the head of the reversed linked list.

    Example:

    Initial linked list: 1 -> 2 -> 3 -> 4 -> NULL
    Reversed link...
  • Ans. 

    Reverse a singly linked list of integers and return the head of the reversed linked list.

    • Iterate through the linked list and reverse the pointers to point to the previous node.

    • Keep track of the current, previous, and next nodes while reversing the linked list.

    • Update the head of the reversed linked list as the last node encountered during reversal.

  • Answered by AI
  • Q2. What are the port numbers of protocols such as FTP and SMTP?
  • Ans. 

    FTP uses port number 21 and SMTP uses port number 25.

    • FTP uses port 21 for data transfer and port 20 for control information.

    • SMTP uses port 25 for email communication.

    • Understanding port numbers is important for network communication.

  • Answered by AI
  • Q3. Can you explain the OSI Model?
  • Ans. 

    The OSI Model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.

    • The OSI Model stands for Open Systems Interconnection Model.

    • It consists of seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

    • Each layer has specific functions and communicates with the adjacent layers.

    • Example: Layer 1 (Physical) deals with physi...

  • Answered by AI
  • Q4. How do you copy files in Linux?
  • Ans. 

    To copy files in Linux, you can use the 'cp' command.

    • Use the 'cp' command followed by the source file and destination directory to copy a file.

    • To copy a directory and its contents, use the '-r' flag with the 'cp' command.

    • You can also use wildcards like '*' to copy multiple files at once.

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAMakeMyTrip interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 4 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview Questionnaire 

8 Questions

  • Q1. Find out the subset of an array of continuous positive numbers from a larger array whose sum of of the elements is larger in comparision to other subset. eg: {1,2 5 -7, 2 5} .The two subarrays are {1,2,5} ...
  • Ans. 

    Find the subset of an array with the largest sum of continuous positive numbers.

    • Iterate through the array and keep track of the current sum and the maximum sum seen so far.

    • If the current element is positive, add it to the current sum. If it is negative, reset the current sum to 0.

    • Also keep track of the start and end indices of the maximum sum subset.

    • Return the subset using the start and end indices.

  • Answered by AI
  • Q2. Given two classes C1 and C2 which are almost same.(remember not exactly same). You want to choose best among these classes so that it can be use as key in hashmap. What question will you ask regarding two ...
  • Q3. You are given two strings s1 and s2.Now, find the smallest substring in s1 containing all characters of s2
  • Ans. 

    Find smallest substring in s1 containing all characters of s2.

    • Create a hash table of characters in s2

    • Use sliding window technique to find smallest substring in s1

    • Check if all characters in s2 are present in the substring

    • Update the smallest substring if a smaller one is found

  • Answered by AI
  • Q4. Questions on OOPS (almost all the concepts were covered like polymorphism, overriding, overloading, inheritance, concept of virtual fxns etc.)
  • Q5. Write algo for reversing a linked list
  • Ans. 

    Algorithm to reverse a linked list

    • Create a new empty linked list

    • Traverse the original linked list and insert each node at the beginning of the new list

    • Return the new list

  • Answered by AI
  • Q6. What is lazy loading? Advantages and disadvantages of the same?
  • Ans. 

    Lazy loading is a technique used to defer the loading of non-critical resources until they are needed.

    • Advantages: faster initial page load, reduced bandwidth usage, improved user experience

    • Disadvantages: increased complexity, potential for slower subsequent page loads, difficulty with SEO

    • Examples: images, videos, and other media files can be loaded only when they are visible on the screen

  • Answered by AI
  • Q7. How ajax works? Difference between angular js and jquery?
  • Ans. 

    Ajax is a technique for creating fast and dynamic web pages. AngularJS is a framework for building dynamic web applications, while jQuery is a library for simplifying HTML DOM traversal and manipulation.

    • Ajax stands for Asynchronous JavaScript and XML

    • It allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes

    • AngularJS is a JavaScript framework that extends HTML with new attrib...

  • Answered by AI
  • Q8. Design a traffic light system?
  • Ans. 

    A traffic light system controls the flow of traffic at intersections.

    • The system consists of three lights: red, yellow, and green.

    • Each light has a specific duration for which it stays on.

    • The system also includes sensors to detect the presence of vehicles and pedestrians.

    • The duration of each light can be adjusted based on traffic patterns.

    • The system can be connected to a central control system for remote monitoring and m

  • Answered by AI

Interview Preparation Tips

Skills: Javascript, Ajax, Angular JS, Jquery
College Name: na

Skills evaluated in this interview

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Head Digital Works Interview FAQs

How many rounds are there in Head Digital Works Front end Developer interview?
Head Digital Works interview process usually has 1 rounds. The most common rounds in the Head Digital Works interview process are One-on-one Round.
How to prepare for Head Digital Works 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 Head Digital Works. The most common topics and skills that interviewers at Head Digital Works expect are Javascript, HTML, React.Js, Android and Angularjs.
What are the top questions asked in Head Digital Works Front end Developer interview?

Some of the top questions asked at the Head Digital Works Front end Developer interview -

  1. Fallback in lazy loading,optimization techniques/for API c...read more
  2. All related to domain javascript/rea...read more

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