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JUSPAY Front end Developer Interview Questions and Answers

Updated 12 Nov 2021

JUSPAY Front end Developer Interview Experiences

1 interview found

I was interviewed in Aug 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 180 Minutes
Round difficulty - Medium

It had some coding questions related to graph.

  • Q1. 

    Dijkstra's Shortest Path Problem Statement

    You are given an undirected graph with V vertices (numbered from 0 to V-1) and E edges. Each edge connects two nodes u and v and has an associated weight represe...

  • Ans. 

    The question is about finding the shortest path distance from a source node to all vertices in an undirected graph.

    • The graph is represented by the number of vertices and edges, followed by the edges and their distances.

    • The task is to find the shortest path distance from the source node (0) to all other nodes.

    • If a node is disconnected from the source node, print the maximum positive integer value (2147483647).

    • Implement ...

  • Answered by AI
  • Q2. 

    Path Existence in Directed Graph

    Given a directed and unweighted graph characterized by vertices 'V' and edges 'E', determine if a path exists from a specified 'source' vertex to a 'destination' vertex. T...

  • Ans. 

    The task is to check if there exists a path from a given source vertex to a destination vertex in a directed and unweighted graph.

    • Read the number of test cases.

    • For each test case, read the number of vertices and edges.

    • Read the edges of the graph.

    • Read the source and destination vertices.

    • Implement a graph traversal algorithm (e.g., BFS or DFS) to check if a path exists from the source to the destination.

    • Print 'true' if a

  • Answered by AI
Round 2 - Coding Test 

(1 Question)

Round duration - 180 Minutes
Round difficulty - Hard

The round was really tough only 1 coding question was asked

  • Q1. 

    Encode N-ary Tree to Binary Tree Problem Statement

    You are provided with an N-ary tree constituted of 'N' nodes, where node '1' is the head of the tree. Your task is to encode this N-ary tree into a binar...

  • Ans. 

    The task is to encode an N-ary tree into a binary tree and then decode the binary tree back into the original N-ary tree.

    • Encode the N-ary tree by representing each node as a binary tree node with its first child as the left child and subsequent children as the right child.

    • To decode the binary tree, traverse the binary tree and for each node, create a new N-ary tree node with its left child as the first child and subseq...

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI completed Computer Science Engineering from Bharati Vidyapeeth's College of Engineering. Eligibility criteriaPassouts 2020/2021JUSPAY interview preparation:Topics to prepare for the interview - Strings, Arrays, Sorting algorithms, Linked List, Loops, Sliding windows, Graphs, Trees, OOPS, DSA, DBMSTime required to prepare for the interview - 3 monthsInterview preparation tips for other job seekers

Tip 1 : Do atleast 2 projects
Tip 2 : Complete competitive programming
Tip 3 : Practice more interview Questions particular to the company applying to

Application resume tips for other job seekers

Tip 1 : Don't lie on resume
Tip 2 : Try to wrap resume in one page

Final outcome of the interviewRejected

Interview questions from similar companies

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 Sep 2024. There were 2 interview rounds.

Round 1 - HR 

(2 Questions)

  • Q1. Past experience
  • Q2. How much da u know
Round 2 - Technical 

(2 Questions)

  • Q1. Merge sort in js
  • Ans. 

    Merge sort is a divide and conquer algorithm that divides the input array into two halves, sorts them, and then merges the sorted halves.

    • Divide the array into two halves recursively

    • Sort each half using merge sort recursively

    • Merge the sorted halves back together

  • Answered by AI
  • Q2. Hoising based question

Skills evaluated in this interview

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

I applied via Referral and was interviewed in Oct 2024. There were 3 interview rounds.

Round 1 - Coding Test 

Was asked to create a UI component keeping in mind scalability and reuseability.

Round 2 - Coding Test 

General discussion about resume and projects, and then some basic JS coding questions like implement throttling and memoization.

Round 3 - Behavioral 

(3 Questions)

  • Q1. Discussion about past experiences and projects
  • Q2. Why you want to leave current job.
  • Q3. Expectations from the role and company

Interview Preparation Tips

Topics to prepare for Razorpay Front end Developer interview:
  • Javascript
  • React.Js
Interview preparation tips for other job seekers - Feedback from HR was very quick, all rounds were scheduled in quick succession. Although one point, HR did not confirm availability before scheduling the interviews. Also didn't get any feedback after getting rejected.
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Company Website and was interviewed before Oct 2023. There were 3 interview rounds.

Round 1 - Coding Test 

It was on hackerrank, it was given to solve 3 questions in JS along with quiz on js concepts

Round 2 - Coding Test 

It was a js fundamental round, was asked similar JS problems asked in the hackerrank test

Round 3 - Technical 

(4 Questions)

  • Q1. Describe your favourite/last project
  • Ans. 

    Developed a responsive e-commerce website for a local boutique selling handmade jewelry

    • Used HTML, CSS, and JavaScript to create a visually appealing and user-friendly interface

    • Implemented a product carousel to showcase different jewelry collections

    • Integrated a payment gateway for secure online transactions

  • Answered by AI
  • Q2. How to keep your updated in tech
  • Ans. 

    Stay updated by regularly reading tech blogs, attending conferences, taking online courses, and networking with other professionals.

    • Read tech blogs regularly (e.g. TechCrunch, Mashable)

    • Attend tech conferences and workshops

    • Take online courses and tutorials (e.g. Udemy, Coursera)

    • Network with other professionals in the field (e.g. LinkedIn, Meetup)

  • Answered by AI
  • Q3. Do you try every new framework comes in the market
  • Ans. 

    I do not try every new framework that comes in the market, but I do stay updated on the latest trends and evaluate them based on project requirements.

    • I prioritize learning frameworks that align with the project needs

    • I assess the pros and cons of new frameworks before deciding to use them

    • I stay updated on industry trends and experiment with new frameworks in personal projects

  • Answered by AI
  • Q4. How will you optimise a code
  • Ans. 

    Optimizing code involves identifying and fixing bottlenecks to improve performance and efficiency.

    • Identify and remove unnecessary code or functions

    • Use efficient algorithms and data structures

    • Minimize network requests and optimize asset loading

    • Implement caching mechanisms

    • Profile and analyze code performance

  • Answered by AI

Interview Preparation Tips

Topics to prepare for Razorpay Front end Developer interview:
  • promises
  • Javascript
  • closures
  • call bind apply
  • web optimisation
Interview preparation tips for other job seekers - Razorpay interviews are easy to clear if your basis concepts are right.

Skills evaluated in this interview

I was interviewed in Aug 2021.

Round 1 - Coding Test 

(1 Question)

Round duration - 90 Minutes
Round difficulty - Easy

1 coding question which was quite easy. Some MCQ that includes basic questions related to html, css, javascript, oops, dbms and output.

  • Q1. 

    LRU Cache Design Question

    Design a data structure for a Least Recently Used (LRU) cache that supports the following operations:

    1. get(key) - Return the value of the key if it exists in the cache; otherw...

  • Ans. 

    Design a Least Recently Used (LRU) cache data structure that supports get and put operations with a given capacity.

    • Implement a doubly linked list to keep track of the order of keys based on their recent usage.

    • Use a hashmap to store key-value pairs for quick access and updates.

    • When capacity is reached, evict the least recently used item before inserting a new one.

    • Update the order of keys in the linked list whenever a ke

  • Answered by AI
Round 2 - Coding Test 

(2 Questions)

Round duration - 90 Minutes
Round difficulty - Easy

easy round. Had some frontend questions related to html ,css, js , etc Explain Closures in JavaScript. In how many ways can we specify the CSS styles for the HTML element?

  • Q1. 

    String Palindrome Verification

    Given a string, your task is to determine if it is a palindrome considering only alphanumeric characters.

    Input:

    The input is a single string without any leading or trailing...
  • Ans. 

    Check if a given string is a palindrome considering only alphanumeric characters.

    • Remove non-alphanumeric characters from the input string.

    • Compare the string with its reverse to check for palindrome.

    • Handle edge cases like empty string or single character input.

    • Use two pointers approach for efficient comparison.

  • Answered by AI
  • Q2. DBMS Questions

    normalization, indexing

  • Ans. 

    Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity. Indexing is a technique to quickly retrieve data from a database.

    • Normalization helps in reducing data redundancy by breaking down tables into smaller, related tables.

    • Indexing is used to quickly retrieve data by creating indexes on columns in a table.

    • Normalization ensures data integrity by minimizing data dupli...

  • Answered by AI
Round 3 - Video Call 

(3 Questions)

Round duration - 120 Minutes
Round difficulty - Hard

late at 8.00 pm

  • Q1. 

    Priority CPU Scheduling Problem

    Given 'N' processes with their “burst times”, where the “arrival time” for all processes is ‘0’, and the ‘priority’ of each process, your task is to compute the “waiting ti...

  • Ans. 

    Implement Priority CPU Scheduling algorithm to compute waiting time and turn-around time for processes.

    • Implement a function that takes in burst times, priorities, and number of processes as input

    • Sort the processes based on priority, with lower process ID as tiebreaker

    • Calculate waiting time and turn-around time for each process based on the scheduling algorithm

  • Answered by AI
  • Q2. Can you explain the concept of data spooling in operating systems?
  • Ans. 

    Data spooling is a process where data is temporarily stored in a buffer before being sent to an output device.

    • Data spooling helps in managing the flow of data between different devices by storing it temporarily.

    • It allows for efficient processing of data by decoupling the input/output operations.

    • Examples of data spooling include print spooling, where print jobs are stored in a queue before being sent to the printer.

  • Answered by AI
  • Q3. What is the difference between inheritance and generalization in the context of database management systems?
  • Ans. 

    Inheritance is a relationship between a superclass and subclass, while generalization is a relationship between entities with common characteristics.

    • Inheritance involves a parent-child relationship where the child class inherits attributes and methods from the parent class.

    • Generalization involves grouping entities with common attributes into a higher-level entity.

    • Inheritance is a specific form of generalization in obje...

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI applied for the job as Frontend Developer in GurgaonEligibility criteriaabove 8 CGPAPaytm (One97 Communications Limited) interview preparation:Topics to prepare for the interview - DATA STRUCTURES, OOPS, DBMS, NETWORKING, ALGORITHMSTime required to prepare for the interview - 1 monthInterview preparation tips for other job seekers

Tip 1 : be confident
Tip 2 : make sure to talk less
Tip 3 : give precise answer

Application resume tips for other job seekers

Tip 1 : mention only relevant things
Tip 2 : be precise

Final outcome of the interviewRejected

Skills evaluated in this interview

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

I applied via Campus Placement and was interviewed before Nov 2023. There was 1 interview round.

Round 1 - Aptitude Test 

1hr aptitude + coding

I was interviewed in Dec 2017.

Interview Questionnaire 

3 Questions

  • Q1. You need to find the maximum water pond formed in bw the building
  • Ans. 

    To find the maximum water pond formed between buildings.

    • Identify the lowest point between the buildings.

    • Calculate the area of the pond using the distance between the buildings and the depth of the pond.

    • Consider any obstacles or uneven ground that may affect the pond's shape.

    • Use a surveying tool or satellite imagery to get accurate measurements.

    • Take into account any drainage systems or natural water flow that may affect

  • Answered by AI
  • Q2. On mars you have to place n robots and they are connected via GPS. now you need to move each robot such that the whole mars is visited and each robot visit the minimum area(meaning no overlapping of area)...
  • Q3. Design dictionary using trie....having operations of inserting a word, updating and deleting (needed to write full running code)
  • Ans. 

    Design a dictionary using trie with insert, update and delete operations.

    • Implement a Trie data structure with nodes containing a character and a boolean flag to indicate end of word

    • For insert operation, traverse the trie and add nodes for each character in the word

    • For update operation, delete the existing word and insert the updated word

    • For delete operation, mark the end of word flag as false and delete the node if it ...

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: Simple questions
Duration: 1 hour 10 minutes
Total Questions: 3

College Name: IIT Guwahati

Skills evaluated in this interview

Interview Preparation Tips

Round: Test
Experience: There were 3 Questions . One on String manipulation and two were on Binary Trees. All were easy but there was time constraint.
Tips: Practice as many question as possible.
Duration: 60 minutes
Total Questions: 3

Round: Technical Interview
Experience: I was given the problem to design a car pooling system complete with the required classes .. data structures which would be used ... how the database would look like etc..
Tips: General understanding of databases and OOP concepts would do.

Round: Technical Interview
Tips: Be thorough and have in-depth knowledge of each and every point of your resume.

College Name: BITS Pilani

Interview Questionnaire 

21 Questions

  • Q1. Discussion of previous written test questions
  • Q2. Find the odd repeating element from a set of repeating elements
  • Ans. 

    Find the odd repeating element from an array of strings

    • Use a hash table to count the frequency of each element

    • Iterate through the hash table to find the element with an odd count

  • Answered by AI
  • Q3. A 2D matrix is given which is row wise and column wise sorted. Find a particular element from it
  • Ans. 

    Finding an element in a sorted 2D matrix

    • Start from the top right corner or bottom left corner

    • Compare the target element with the current element

    • Move left or down if the target is smaller, else move right or up

    • Repeat until the target is found or all elements are checked

  • Answered by AI
  • Q4. SQL Query to find Nth highest salary from table
  • Ans. 

    SQL query to find Nth highest salary from table

    • Use ORDER BY and LIMIT clauses

    • Use subquery to get the Nth highest salary

    • Handle cases where there are less than N distinct salaries

  • Answered by AI
  • Q5. Another basic SQL query
  • Q6. Write a function that returns '3' when '4' is passed as an input and vice versa without using if-else condition
  • Ans. 

    Function to swap '3' and '4' without using if-else

    • Use XOR operator to swap the values

    • Convert the input to ASCII code and perform the swap

    • Use a lookup table to map the values

  • Answered by AI
  • Q7. Question on Suffix trees
  • Q8. Question on Tries
  • Q9. Question on Ternary search trees
  • Q10. Question on hash maps
  • Q11. Question on complexity of an algorithm
  • Q12. 3-4 SQL queries
  • Q13. Question on SQL joins
  • Q14. JAVA questions on static block,static function and static variables
  • Q15. JAVA questions on memory initialization and references
  • Q16. Puzzle on measuring exactly half a glass of water
  • Q17. Introduce yourself
  • Ans. 

    I am a software developer with experience in Java and Python.

    • Proficient in Java and Python programming languages

    • Experience in developing web applications using Spring framework

    • Familiarity with database management systems like MySQL and MongoDB

  • Answered by AI
  • Q18. Why PAYTM?
  • Ans. 

    PAYTM is a leading digital payment platform in India with a wide range of services.

    • PAYTM has a user-friendly interface and offers a seamless payment experience.

    • It provides a variety of services like mobile recharges, bill payments, and online shopping.

    • PAYTM has a strong focus on security and fraud prevention measures.

    • It has a large user base and is widely accepted by merchants across India.

    • PAYTM is constantly innovatin...

  • Answered by AI
  • Q19. Will you go for further studies?
  • Ans. 

    Yes, I am open to pursuing further studies in the future.

    • I believe in continuous learning and staying updated with the latest technologies.

    • Further studies can help me specialize in a particular field and enhance my skills.

    • I may consider pursuing a master's degree in computer science or a related field.

    • However, my immediate focus is on gaining practical experience and contributing to the organization.

  • Answered by AI
  • Q20. Why do you think has PAYTM grown so fast?
  • Ans. 

    PAYTM grew fast due to its innovative approach and early adoption of digital payments.

    • Early adoption of digital payments in India

    • Innovative approach with features like mobile recharges, bill payments, and cashback offers

    • Expansion into e-commerce and financial services

    • Strategic partnerships with major companies like Uber and Alibaba

  • Answered by AI
  • Q21. (looking at my CGPA of 9) You can get a better company. Then Why PAYTM only?

Interview Preparation Tips

Round: Test
Experience: there were 20 mcqs and 2 coding questions. It was a pen and paper test. We were given 1 hour to solve it. The mcqs were of average difficulty. The 2 coding questions were:
1. A variation of the standard Josephus Problem
2. Find the 'x' largest elements from 'n' input elements without using sorting.
Tips: They focus on algorithms not on complete solutions. Do not leave any question unattempted. If you do not know the exact approach then use Brute-Force approach.

Round: Technical Interview
Experience: The Interviewer was very nice. He was focussing on the approach used not on codes.
Tips: Be calm and think by basics :)

Round: Technical Interview
Experience: The interviewer asked high level data structures in this round. But again he saw the approach used and not exact solution
Tips: Don't give up. Tell whatever you know

Round: Technical Interview
Experience: JAVA questions were based on very detailed concepts. Study OOP properly.
Tips: Maintain your calm :)

Round: HR Interview
Experience: Overall the experience was nice and smooth.
Tips: If they allow you to ask them any question then ask them something about the company. They should find you interested in the company :)

General Tips: Just be cool. Show them you are enthusiastic to learn and work. While prepration focus on Basics and Algorithms. Prepare DBMS nicely too :)
Skill Tips: Have full knowledge about your projects
Skills: JAVA, Data Structures, Operating systems, Network Programming, DBMS
College Name: NIT Jalandhar
Motivation: PAYTM is a perfect mix for the dynamic startup culture and stability of a big organiztaion. PAYTM has an amazing work culture and excellent opportunities for growth

Skills evaluated in this interview

Interview Preparation Tips

Skills: Algorithm, Java, Data structure
College Name: na

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JUSPAY Front end Developer Interview Process

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Interview experience

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Average
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