Upload Button Icon Add office photos
Engaged Employer

i

This company page is being actively managed by Mantra Labs Team. If you also belong to the team, you can get access from here

Mantra Labs Verified Tick

Compare button icon Compare button icon Compare

Filter interviews by

Clear (1)

Mantra Labs Front end Developer Interview Questions and Answers

Updated 17 Jan 2022

Mantra Labs Front end Developer Interview Experiences

1 interview found

Interview Questionnaire 

2 Questions

  • Q1. Where will u see yourself in next five year
  • Q2. Why should i hire u

Interview Preparation Tips

Interview preparation tips for other job seekers - be normle in intervew and ask a quetion in last they will be impressed with you

Interview questions from similar companies

I was interviewed before Dec 2020.

Round 1 - Coding Test 

(1 Question)

Round duration - 360 minutes
Round difficulty - Medium

Basically TCS conduct its flagship event named as CODEVITA . And it offers Internship to prefinal (3rd )year students .

  • Q1. 

    Allocate Books Problem Statement

    Given an array of integers arr, where arr[i] represents the number of pages in the i-th book, and an integer m representing the number of students, allocate all the books ...

  • Ans. 

    Allocate books to students in a way that minimizes the maximum number of pages assigned to a student.

    • Iterate through possible allocations and calculate the maximum pages assigned to a student.

    • Find the minimum of these maximums to get the optimal allocation.

    • Return the minimum pages allocated in each test case, or -1 if not possible.

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaMust be doing B.TECHTata Consultancy Services (TCS) interview preparation:Topics to prepare for the interview - Data Structure , Algorithms ,DBMS , OOPs ,OSTime required to prepare for the interview - 2 MonthsInterview preparation tips for other job seekers

Tip 1 : Good understanding of Data Structure and Algorithms 
Tip 2 : Be clear in your Core Subjects.
Tip 3 : Do at least 1 good Project .
Tip 4 : Be humble and speak truth .

Application resume tips for other job seekers

Tip 1 : Simple and Crisp .
Tip 2 : Do host your project and mention the link in the resume .
Tip 3 : Single Page

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Hard
Process Duration
6-8 weeks
Result
Selected Selected

I applied via Company Website and was interviewed before Mar 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 - Coding Test 

An online open assisment is given and it has around 50 MCQs that need to be done in 50 mins

Round 3 - Assignment 

An assignmnet is given that need to be done in 7 days

Interview Preparation Tips

Interview preparation tips for other job seekers - Focus on Javascript, DSA
Fair knowledge of HTML, CSS
Good practice of OOPS

I was interviewed in Jul 2021.

Round 1 - Coding Test 

Round duration - 180 Minutes
Round difficulty - Medium

General Questions Like - Introduction & How all the round have gone so far

Round 2 - Video Call 

(1 Question)

Round duration - 90 Minutes
Round difficulty - Medium

One-to-One Interview based on DSA and Front-End Technologies including HTML, CSS & JS.

  • Q1. 

    Remove Duplicates Problem Statement

    You are given an array of integers. The task is to remove all duplicate elements and return the array while maintaining the order in which the elements were provided.

    ...

  • Ans. 

    Remove duplicates from an array of integers while maintaining order.

    • Iterate through the array and add elements to a new array if they are not already present

    • Use a hash set to keep track of unique elements

    • Return the new array with unique elements in the same order as the original array

  • Answered by AI
Round 3 - Video Call 

(1 Question)

Round duration - 90 Minutes
Round difficulty - Hard

One-to-One Interview based on Front-End Technologies including HTML, CSS & JS.

In the last 10-20 minutes, some behavioral questions were asked:
1 How would you grade yourself in the interview so far?
2. You are present in a team and you have to convince your team members & client that your approach is better than the other team members.
3. You are the team leader & you have to point out & convey the negative points of a member of your team without getting him/her hurt.
- At last, they asked me if I have questions for them( I asked 2 questions ) & then the interview ended.

  • Q1. 

    Merge K Sorted Arrays Problem Statement

    Given 'K' different arrays that are individually sorted in ascending order, merge all these arrays into a single array that is also sorted in ascending order.

    Inpu...

  • Ans. 

    Merge K sorted arrays into a single sorted array.

    • Create a min heap to store the first element of each array along with the array index.

    • Pop the top element from the heap, add it to the result array, and push the next element from the same array back to the heap.

    • Repeat the process until all elements are processed.

    • Time complexity: O(N log K) where N is the total number of elements and K is the number of arrays.

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI completed Information Technology from HMR Institute of Technology and Management. I applied for the job as Frontend Developer in GurgaonEligibility criteriaNo CriteriaJosh Technology Group interview preparation:Topics to prepare for the interview - HTML, CSS, JS, FE-Dev Concepts, Data StructuresTime required to prepare for the interview - 3 MonthsInterview preparation tips for other job seekers

Tip 1 : Make at least 1 full-stack project from scratch.
Tip 2 : Understand each & every concept & topic in depth.

Application resume tips for other job seekers

Tip 1 : Make it authentic.
Tip 2 : Sync your resume with company JD.

Final outcome of the interviewSelected

Skills evaluated in this interview

I was interviewed in May 2022.

Round 1 - Coding Test 

(3 Questions)

Round duration - 90 Minutes
Round difficulty - Easy

You are given three ds coding questions which you have to solve within 90 mins.
The questions are easy to medium level for this round

  • Q1. 

    Non-Decreasing Array Problem Statement

    Given an integer array ARR of size N, determine if it can be transformed into a non-decreasing array by modifying at most one element.

    An array is defined as non-de...

  • Ans. 

    The solution checks if an integer array can become non-decreasing by modifying at most one element.

    • Iterate through the array and check if there are more than one decreasing pairs of elements.

    • If there are more than one decreasing pairs, return false.

    • If there is only one decreasing pair, check if modifying one of the elements can make the array non-decreasing.

    • If modifying the element at index i-1 or i can make the array ...

  • Answered by AI
  • Q2. 

    Sort Linked List Based on Actual Values

    You are given a Singly Linked List of integers that is initially sorted according to the absolute values of its elements. Your task is to sort this Linked List base...

  • Ans. 

    The task is to sort a singly linked list based on actual values instead of absolute values.

    • Traverse the linked list and store the values in an array

    • Sort the array using any sorting algorithm

    • Create a new linked list using the sorted array

    • Return the new linked list

  • Answered by AI
  • Q3. 

    Diameter of a Binary Tree Problem Statement

    Given a binary tree, return the length of its diameter. The diameter of a binary tree is defined as the length of the longest path between any two nodes in the ...

  • Ans. 

    The diameter of a binary tree is the length of the longest path between any two end nodes in the tree.

    • The diameter of a binary tree can be calculated by finding the maximum of the following three values: 1) the diameter of the left subtree, 2) the diameter of the right subtree, and 3) the longest path that passes through the root node.

    • To find the diameter of a binary tree, we can use a recursive approach. We calculate ...

  • Answered by AI
Round 2 - Assignment 

Round duration - N/A
Round difficulty - Medium

Round 3 - Video Call 

(1 Question)

Round duration - 120 Minutes
Round difficulty - Hard

This round focus on advanced Js concepts and the tech stack I used in my projects.

  • Q1. 

    Find Unique Element in Array

    You have been provided an integer array/list ARR of size N. Here, N is equivalent to 2M + 1 where each test case has M numbers appearing twice and one number appearing exactly...

  • Ans. 

    The task is to find the unique number in an array where all other numbers occur twice.

    • The array size is given by N = 2M + 1, where M is the number of elements occurring twice.

    • Loop through the array and use a hashmap to count the occurrences of each number.

    • Return the number with a count of 1, as it is the unique number.

  • Answered by AI
Round 4 - HR 

Round duration - 60 Minutes
Round difficulty - Easy

It was a late night round as i have already had the previous 3 rounds at the same day. The HR asked about my experience regarding the previous rounds and also some situation based questions.

Interview Preparation Tips

Eligibility criteria7 CGPAJosh Technology Group interview preparation:Topics to prepare for the interview - Semantic HTML, Core concepts of CSS, SASS, JavaScriptTime required to prepare for the interview - 3 MonthsInterview preparation tips for other job seekers

Tip 1 : Have your basics storing rather than focusing on react or any other similar frameworks
Tip 2 : Practice DOM manipulation using JS as in the assignment round you'll have to code an assignment with your screen shared
Tip 3 : Practice advance JS concepts like prototyping, promises, etc.
Tip 4 : Study your projects thoroughly, what tech you used where and why
Tip 5 : Don't think that if you are unable to answer some output based questions or to code some question so you will not get selected. I myself have multiple wrong answers to tricky js output based questions but then the interviewer asks you to execute the question and explain why this has happened. If you are able to explain the correct reason for the answer you are good to go.

Application resume tips for other job seekers

Tip 1 : Mention your best projects along with Tech stack used so the interviewer can see what all tech stack you have worked on
Tip 2 : Do not put false things on resume, as the interviewer will definitely ask cross questions and you will get tricked.
Tip 3 : Don't worry about the resume too much, you are the main focus of the interview and not the resume.

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed before Mar 2023. There were 5 interview rounds.

Round 1 - Coding Test 

- They use their own platform for interviews, and assessments.
- There were html, css, js based questions in the coding round.
- Some questions were theoretical too.
- They tested nearly all major parts of js including let, const, arrays, promise, async, await, events, lexical scope, etc.

Round 2 - Technical 

(1 Question)

  • Q1. It was an online machine coding round, where you have to build something they ask in 1hr using html, css, js (vanilla).
Round 3 - Technical 

(1 Question)

  • Q1. Focused on html, css, and js (basic)
Round 4 - Technical 

(1 Question)

  • Q1. Focus majorly on JS some quick demonstration, advanced concepts like closures, async nature of js, etc
Round 5 - HR 

(1 Question)

  • Q1. Behavioral round

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare JS advance concept well

I was interviewed in Aug 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This was the DSA questions round. There were 2 questions. and both were basic questions.

  • Q1. 

    Check If Linked List Is Palindrome

    Given a singly linked list of integers, determine if the linked list is a palindrome.

    Explanation:

    A linked list is considered a palindrome if it reads the same forwar...

  • Ans. 

    Check if a given singly linked list of integers is a palindrome or not.

    • Create a function to reverse the linked list.

    • Use two pointers to find the middle of the linked list.

    • Compare the first half of the linked list with the reversed second half to determine if it's a palindrome.

  • Answered by AI
  • Q2. 

    Segregate Odd-Even Problem Statement

    In a wedding ceremony at NinjaLand, attendees are blindfolded. People from the bride’s side hold odd numbers, while people from the groom’s side hold even numbers. For...

  • Ans. 

    Rearrange a linked list such that odd numbers appear before even numbers while preserving the order.

    • Create two separate linked lists for odd and even numbers

    • Traverse the original list and append nodes to respective odd/even lists

    • Combine the odd and even lists while maintaining the order

    • Return the rearranged linked list

  • Answered by AI
Round 2 - Coding Test 

Round duration - 90 Minutes
Round difficulty - Easy

This was a subjective round where we have to code HTML, CSS, and JS. We were not allowed to use any external editor and their editor was just plain notepad so we couldn't even see the output but still, we completed it. Everyone at my college passed this round.

Round 3 - Assignment 

Round duration - 10080 Minutes
Round difficulty - Easy

Round 4 - Face to Face 

Round duration - 120 Minutes
Round difficulty - Medium

In this round, the interviewer asked me to turn on screen mirroring. And then he gave me 1 more design which I needed to create in front of him in the next 2 hours. In the previous round, the focus was on HTML and CSS but in this round, the major focus was on JS. You are allowed to use google but not copy-paste the whole code.

Round 5 - Video Call 

Round duration - 90 Minutes
Round difficulty - Hard

This was an online interview with one of their employees. My interview was taken by their front-end lead. She was very helpful during the interview. You are allowed to search for documentation.

Round 6 - Video Call 

Round duration - 90 Minutes
Round difficulty - Easy

This was also a front-end interview round. The interviewer was again very helpful and I was allowed to google.

Interview Preparation Tips

Professional and academic backgroundI completed Computer Science Engineering from Maharaja Agrasen Institute Of Technology. Eligibility criteria65% + in B.TechJosh Technology Group interview preparation:Topics to prepare for the interview - Data Structures, HTML, CSS, JavaScript, ReactJsTime required to prepare for the interview - 10 MonthsInterview preparation tips for other job seekers

Tip 1 : You will need to know advanced HTML and CSS which are used in real life like meta tags in HTML and media queries in CSS. 
Tip 2 : You will need practical knowledge of js functions like map, filter, reduce apart from basic that we can use map in react to render lists.
Tip 3 : Learning some advanced concepts like debouncing, throttling, call, bind, etc will be helpful.

Application resume tips for other job seekers

Tip 1 : Prepare for every word that you wrote in your resume,
Tip 2 : HR will ask about your projects and you should always have a good story for each project like why you create this project. This will really score some points in the interview.

Final outcome of the interviewSelected

Skills evaluated in this interview

I applied via Campus Placement and was interviewed in Jul 2021. There were 5 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. 20 questions from HTML and CSS which were basic and moderate in difficulty level.
  • Q2. 10 Questions from JavaScript which were basically from implementation point of view, means that, if we want a certain functionality in our website than what JS code will be required. Questions in JS sectio...

Interview Preparation Tips

Interview preparation tips for other job seekers - I would say prepare JavaScript more than HTML and CSS. Because they will ask more tough questions from JS.
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

They have their own platform

Round 2 - Assignment 

Take home assignment

Round 3 - Technical 

(1 Question)

  • Q1. Live coding round of CRUD based small app.
Round 4 - Technical 

(1 Question)

  • Q1. More on HTML, CSS, JS
Round 5 - Technical 

(1 Question)

  • Q1. Promises, async/await, settimeout etc.

Interview Preparation Tips

Interview preparation tips for other job seekers - Just keep your core knowledge strong
Interview experience
3
Average
Difficulty level
Hard
Process Duration
2-4 weeks
Result
Not Selected

I applied via Approached by Company and was interviewed in Feb 2024. There were 3 interview rounds.

Round 1 - Aptitude Test 

I was asked 60 question with various snppits or problems to be solved within a time frame of 1 hour

Round 2 - Coding Test 

3 dsa 2 medium 1 hard

Round 3 - Assignment 

To create a project in which i was asked to simply create a exact same page as given in design

Interview Preparation Tips

Interview preparation tips for other job seekers - Not good enough company
Contribute & help others!
anonymous
You can choose to be anonymous

Mantra Labs Interview FAQs

How to prepare for Mantra Labs 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 Mantra Labs. The most common topics and skills that interviewers at Mantra Labs expect are Angularjs, CSS, HTML, Javascript and React.Js.

Recently Viewed

INTERVIEWS

Cyntexa

No Interviews

INTERVIEWS

Cyntexa

No Interviews

SALARIES

Winfo Solutions

INTERVIEWS

GMR Energy

No Interviews

SALARIES

APPSeCONNECT

INTERVIEWS

Mantra Labs

No Interviews

SALARIES

L1 Supply Networks

SALARIES

Winfo Solutions

INTERVIEWS

R K Marbles

No Interviews

INTERVIEWS

APPSeCONNECT

No Interviews

Tell us how to improve this page.

Mantra Labs Front end Developer Salary
based on 7 salaries
₹5 L/yr - ₹10 L/yr
19% more than the average Front end Developer Salary in India
View more details

Mantra Labs Front end Developer Reviews and Ratings

based on 1 review

5.0/5

Rating in categories

5.0

Skill development

5.0

Work-life balance

5.0

Salary

5.0

Job security

5.0

Company culture

5.0

Promotions

5.0

Work satisfaction

Explore 1 Review and Rating
Software Engineer
175 salaries
unlock blur

₹0 L/yr - ₹0 L/yr

Senior Software Engineer
97 salaries
unlock blur

₹0 L/yr - ₹0 L/yr

Technical Lead
36 salaries
unlock blur

₹0 L/yr - ₹0 L/yr

Software Developer
31 salaries
unlock blur

₹0 L/yr - ₹0 L/yr

UI/UX Designer
14 salaries
unlock blur

₹0 L/yr - ₹0 L/yr

Explore more salaries
Compare Mantra Labs with

TCS

3.7
Compare

Infosys

3.6
Compare

Wipro

3.7
Compare

HCLTech

3.5
Compare
Did you find this page helpful?
Yes No
write
Share an Interview