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MagicPin Software Developer Intern Interview Questions and Answers

Updated 2 Jun 2017

MagicPin Software Developer Intern Interview Experiences

1 interview found

I was interviewed before Jun 2016.

Interview Questionnaire 

5 Questions

  • Q1. Knowledge of Java
  • Q2. Knowledge of Python
  • Q3. Knowledge of PHP
  • Q4. My team working skills
  • Q5. Ability to handle pressure
  • Ans. 

    I have the ability to handle pressure effectively.

    • I remain calm and focused in high-pressure situations.

    • I prioritize tasks and manage my time efficiently.

    • I seek support and guidance from team members when needed.

    • I maintain a positive attitude and adapt to changing circumstances.

    • I have successfully completed projects under tight deadlines.

  • Answered by AI

Interview Preparation Tips

Round: Technical Interview
Experience: The interview was interactive and the interviewers seemed interested for every answer I gave even if it was a wrong one. They corrected me at every step.

Round: Technical + HR Interview
Experience: This was basically for testing my moral towards working and how i cope up with other colleagues.

College Name: Ramaiah Institute Of Technology

Interview questions from similar companies

I was interviewed before Dec 2020.

Round 1 - Face to Face 

(2 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This round was purely based on Data Structures and Algorithms . One has to be fairly comfortable in solving Algorithmic problems to pass this round . Both the questions asked were quite common and luckily I had already prepared them from CodeStudio and LeetCode.

  • Q1. 

    Binary Tree Traversals Problem Statement

    Given a Binary Tree with 'N' nodes, where each node holds an integer value, your task is to compute the In-Order, Pre-Order, and Post-Order traversals of the binar...

  • Ans. 

    Compute the In-Order, Pre-Order, and Post-Order traversals of a Binary Tree given in level-order format.

    • Implement functions to perform In-Order, Pre-Order, and Post-Order traversals of a Binary Tree.

    • Use level-order input to construct the Binary Tree.

    • Traverse the Binary Tree recursively to generate the required traversals.

    • Ensure proper handling of null nodes represented by -1 in the input.

    • Return the three traversals as

  • Answered by AI
  • Q2. 

    Reverse Linked List Problem Statement

    Given a Singly Linked List of integers, your task is to reverse the Linked List by altering the links between the nodes.

    Input:

    The first line of input is an intege...
  • Ans. 

    Reverse a singly linked list by altering the links between nodes.

    • Iterate through the linked list and reverse the links between nodes

    • Use three pointers to keep track of the current, previous, and next nodes

    • Update the links between nodes to reverse the list

    • Return the head of the reversed linked list

  • Answered by AI
Round 2 - Face to Face 

(1 Question)

Round duration - 45 Minutes
Round difficulty - Medium

This round basically tested some concepts from Data Structures and File Manipulation .

  • Q1. 

    Intersection of Two Arrays Problem Statement

    Given two arrays A and B with sizes N and M respectively, both sorted in non-decreasing order, determine their intersection.

    The intersection of two arrays in...

  • Ans. 

    The problem involves finding the intersection of two sorted arrays efficiently.

    • Use two pointers to iterate through both arrays simultaneously.

    • Compare elements at the pointers and move the pointers accordingly.

    • Handle cases where elements are equal and update the intersection array.

    • Return the intersection array as the result.

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPABig Basket interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, Operating Systems, Aptitude, OOPSTime required to prepare for the interview - 3 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 applied via Campus Placement

Interview Preparation Tips

Round: Resume Shortlist
Experience: They selected 10 students from our college from CS and IT .They are looking for guys with extra projects done during college .App development will be a bonus ,contribution to open source and competitive programming will help for shortlisting.
Some of my friends had research papers published and they too got selected.

Round: Test
Experience: Have to write code snippet for 4 questions in 45 minutes
1.Difference between hour hand and minute hand
2.longest palindromic sub string.
3.Product Array puzzle
4.Some question related to matrix

Tips: All question were from geeksforgeeks
So practice it well ..u will make through it

Round: Test
Experience: Long Discussion on projects
They will scan each and every line of your Resume ,so dont write bullshits..
I wrote about interest in AI and got screwed..Discussion on college projects and final year project.
Then asked me to design a snake and ladder game OOPS concepts
Told me to find sum of all elements of sub matrix..(hint pre-processing the matrix)
Asked me about sessions and cookies
Gave a query to write on database indexing (dont remember exactly)
Asked me the code of the difference between hour hand and minute hand and extended it wid the second hand
Asked me as how to implement a dictionary
asked about TRIES ,CODE SNIPPET ON THE SHARED DOCS
One of my friend was asked to implement (set) of STL
Tips: The interviewer was cool guy..helped me a lot always made me comfortable.Interact with them as much as possible

Round: Test
Experience: Wid the CTO of the company .
Started wid the projects again .ACID properties,Database transactions,Concurrency Control
Optimization in database.
Then he asked me to code a function
Given a hash function applied on letters of English words ,un-hash it.Took me 45 minutes to reach the solution ,he helped me a lot.
Asked me to write the code for diameter of a binary tree
Asked me write the code for Boolean Matrix
One of my friend was asked to a question in which there was a bug in a m*n matrix and we have to find the bug(hint dfs or bfs)
Tips: keep calm ,,just keep talking ad he will help u a lot...

Round: HR
Experience: This was the toughest round for me...I had cleared all the rounds but they rejected me in the HR round ,,,dont know where I screwed..Learn every thing of Zomato..
They offered me an internship and thereafter they would look to give a PPO ...!!!lets see what happens

Skills: Coding Skills And Knowledge On Data Structures
Duration: 3
College Name: NIT Srinagar

Interview Questionnaire 

9 Questions

  • Q1. Write a regex for email validation?
  • Ans. 

    Regex for email validation

    • Start with a string of characters followed by @ symbol

    • Followed by a string of characters and a period

    • End with a string of characters with a length of 2-6 characters

    • Allow for optional subdomains separated by periods

    • Disallow special characters except for . and _ in username

  • Answered by AI
  • Q2. Parse the XML? and store the output in JSON. Discussed different approaches?
  • Q3. Print prime numbers in a given range and optimize the solution?
  • Ans. 

    Print prime numbers in a given range and optimize the solution.

    • Use Sieve of Eratosthenes algorithm to generate prime numbers efficiently

    • Start with a boolean array of size n+1, mark all as true

    • Loop through the array and mark all multiples of each prime as false

    • Print all the indexes that are still marked as true

  • Answered by AI
  • Q4. Puzzle – 25 horses – 5 lanes, find fastest 3 horses?
  • Q5. Web related questions on Sessions and cookies?
  • Q6. A lot of discussion on my resume, experience etc
  • Q7. Find angle between hour hand and minute hand in clock if time is given? Write a program or pseudo code?
  • Ans. 

    Find angle between hour and minute hand in a clock given the time.

    • Calculate the angle made by the hour hand with respect to 12 o'clock position

    • Calculate the angle made by the minute hand with respect to 12 o'clock position

    • Find the difference between the two angles and take the absolute value

    • If the angle is greater than 180 degrees, subtract it from 360 degrees to get the smaller angle

  • Answered by AI
  • Q8. A hash function was written to convert a string into a hash. Write a un-hash function to revert it(from hash to string)?
  • Ans. 

    To un-hash a string, use a reverse algorithm to convert the hash back to the original string.

    • Create a reverse algorithm that takes the hash as input and outputs the original string

    • Use the same logic as the hash function but in reverse order

    • If the hash function used a specific algorithm, use the inverse of that algorithm to un-hash the string

  • Answered by AI
  • Q9. He discussed about expectations and role. Asked me if I have any questions. He said to me “yaha aana hai to marwani padegi. tyar ho”? I smiled and asked what are the work timings? He said 9-9 and I was kin...

Interview Preparation Tips

General Tips: I applied through a recruiter. Then I got a call from Zomato HR. It was for LAMP developer profile. She asked me about my profile and also shared some expectations from the role. She asked me to come for F2F rounds to take the process further
Skills: Web development, JSON, Algorithm
College Name: na
Motivation: Overall process was not very tough. But they have start up culture. People work their for 11-12 hours a day. Sometimes on Saturday as well. So people who are geeks or have nothing in life to do except their job can go and join

Skills evaluated in this interview

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 Questionnaire 

32 Questions

  • Q1. Discussion on the rectangular board question asked in prev round
  • Q2. How will you implement a shuffle function for a playlist of songs
  • Ans. 

    Implementing a shuffle function for a playlist of songs

    • Create a new empty playlist

    • Randomly select a song from the original playlist and add it to the new playlist

    • Remove the selected song from the original playlist

    • Repeat until all songs have been added to the new playlist

    • Return the new shuffled playlist

  • Answered by AI
  • Q3. What is memory leak?
  • Ans. 

    Memory leak is a situation where a program fails to release memory it no longer needs.

    • Memory leaks can cause a program to consume more and more memory over time, eventually leading to crashes or other issues.

    • Memory leaks can be caused by programming errors such as not freeing memory after it is no longer needed.

    • Tools like valgrind can be used to detect memory leaks in C and C++ programs.

    • Examples of memory leaks include...

  • Answered by AI
  • Q4. What is the problem with arrays?
  • Ans. 

    Arrays have fixed size and can lead to memory wastage and performance issues.

    • Arrays have a fixed size and cannot be resized dynamically.

    • Inserting or deleting elements in an array can be time-consuming.

    • Arrays can lead to memory wastage if they are not fully utilized.

    • Arrays can cause performance issues if they are too large and need to be traversed frequently.

    • Arrays can also be prone to buffer overflow attacks.

    • Example: A...

  • Answered by AI
  • Q5. Write a function in javascript to hide text on mouse click
  • Ans. 

    Function to hide text on mouse click in JavaScript

    • Create a function that takes an element as input

    • Add an event listener to the element for a mouse click

    • Toggle the element's display property between 'none' and its original value

  • Answered by AI
  • Q6. A unsorted array was given and a number x.find out the two elements whose sum is equal to x
  • Ans. 

    Find two elements in an unsorted array whose sum is equal to a given number x.

    • Use a hash table to store the difference between x and each element in the array.

    • Iterate through the array and check if the current element is in the hash table.

    • Return the pair of elements that add up to x.

  • Answered by AI
  • Q7. More questions on basic OS concepts related to storage, memory
  • Q8. Puzzle : -----/
  • Q9. What is BST ?
  • Ans. 

    BST stands for Binary Search Tree, a data structure used for efficient searching and sorting operations.

    • BST is a tree-like data structure where each node has at most two children.

    • The left child of a node contains a value less than the parent node, while the right child contains a value greater than the parent node.

    • BST allows for efficient searching and sorting operations with a time complexity of O(log n).

    • Examples of a...

  • Answered by AI
  • Q10. How many BSTs are possible with two nodes and three nodes?
  • Ans. 

    Number of possible BSTs with 2 and 3 nodes.

    • For 2 nodes, only 2 BSTs are possible.

    • For 3 nodes, 5 BSTs are possible.

    • Number of BSTs can be calculated using Catalan numbers formula.

    • Catalan(2) = 2, Catalan(3) = 5.

  • Answered by AI
  • Q11. How many trees are possible with two and three nodes?
  • Ans. 

    Answering the question about possible trees with two and three nodes.

    • For two nodes, there is only one possible tree.

    • For three nodes, there are three possible trees.

    • The formula for calculating the number of possible trees with n nodes is (2n-3)!!.

    • The double exclamation mark represents the double factorial function.

    • The double factorial function is defined as n!! = n(n-2)(n-4)...(1 or 2).

  • Answered by AI
  • Q12. Puzzle : 100 people are standing in a circle .each one is allowed to shoot a person infront of him and he hands the gun to the next to next person for e.g 1st person kills 2nd and hands gun to 3rd .This c...
  • Q13. What is indexing? Why it is used?
  • Q14. What are B+ trees?what is the advantage?
  • Ans. 

    B+ trees are balanced trees used for indexing and searching large amounts of data.

    • B+ trees are similar to binary search trees but have multiple keys per node.

    • They are commonly used in databases and file systems.

    • B+ trees have a high fanout, reducing the number of disk accesses required for searching.

    • They are also self-balancing, ensuring efficient performance even with large amounts of data.

    • Example: In a database, a B+ ...

  • Answered by AI
  • Q15. Any questions you want to ask?
  • Ans. 

    Yes, I have a few questions.

    • Can you tell me more about the team I'll be working with?

    • What is the company culture like?

    • What are the biggest challenges the team is currently facing?

    • Can you walk me through the development process for a typical project?

    • What opportunities are there for professional growth and development?

  • Answered by AI
  • Q16. Asked me about the skills i have mentioned in my resume
  • Q17. Which data structure i like?
  • Ans. 

    I prefer hash tables for their constant time lookup and insertion.

    • Hash tables are efficient for storing and retrieving data.

    • They have constant time complexity for both insertion and lookup.

    • They can be implemented using arrays or linked lists.

    • Examples include Python's dictionary and Java's HashMap.

  • Answered by AI
  • Q18. Can you implement a stack using queue
  • Ans. 

    Yes, we can implement a stack using two queues.

    • Push operation: Enqueue the element to the first queue.

    • Pop operation: Dequeue all elements from the first queue and enqueue them to the second queue until the last element. Dequeue and return the last element. Swap the names of the queues.

    • Top operation: Same as pop operation but don't dequeue the last element.

    • Example: Push 1, 2, 3. Queue 1: 1 2 3. Queue 2: empty. Pop opera...

  • Answered by AI
  • Q19. Two arrays of arrival time of trains and departure time of trains were given. find the minimum no of platforms require so that no collision occurs
  • Ans. 

    Find minimum no of platforms required to avoid collision between trains based on their arrival and departure times.

    • Sort both arrays in ascending order

    • Initialize platform count and max count to 1

    • Loop through both arrays and compare arrival and departure times

    • If arrival time is less than or equal to departure time, increment platform count

    • Else, decrement platform count

    • Update max count if platform count is greater than ma

  • Answered by AI
  • Q20. What is JVM ? Difference between JVM and compiler
  • Ans. 

    JVM stands for Java Virtual Machine. It is an abstract machine that provides a runtime environment for Java programs.

    • JVM is responsible for interpreting the compiled Java code and executing it.

    • It provides platform independence by converting bytecode into machine-specific code.

    • JVM has various components like class loader, bytecode verifier, and execution engine.

    • Compiler converts source code into bytecode, while JVM exec...

  • Answered by AI
  • Q21. He asked me to write a html code for a page design he gave
  • Q22. He asked me to write a query for a relational schema and problem statement given by him
  • Q23. Tell me about Yourself
  • Ans. 

    I am a software engineer with experience in developing web applications and a passion for learning new technologies.

    • Experienced in developing web applications using technologies such as Java, Spring, and Angular

    • Passionate about learning new technologies and keeping up with industry trends

    • Strong problem-solving skills and ability to work in a team environment

    • Completed a Bachelor's degree in Computer Science from XYZ Uni

  • Answered by AI
  • Q24. She asked me if i was nervous
  • Q25. What do i know about PayTM ?
  • Ans. 

    PayTM is an Indian e-commerce payment system and digital wallet company.

    • PayTM was founded in 2010 by Vijay Shekhar Sharma.

    • It started as a mobile recharge and bill payment platform.

    • PayTM has expanded to offer services like online shopping, movie ticket booking, and travel bookings.

    • It also offers a digital wallet that can be used to pay for various services and products.

    • PayTM has over 350 million registered users and is ...

  • Answered by AI
  • Q26. Any feature i would like to add in PayTM app?
  • Ans. 

    I would like to add a feature for splitting bills among friends.

    • The feature would allow users to split bills for movies, dinners, etc.

    • Users can select friends from their contact list and split the bill equally or unequally.

    • The app would send a notification to the selected friends to pay their share.

    • The feature would make it easier for users to split expenses and avoid awkward conversations.

    • It would also encourage more

  • Answered by AI
  • Q27. What is my favourite app and any improvements in it which i want to implement?
  • Ans. 

    My favourite app is Spotify. I would like to see improvements in the algorithm for personalized playlists.

    • Improved algorithm for personalized playlists

    • Better integration with social media platforms

    • Option to create collaborative playlists with friends

  • Answered by AI
  • Q28. She asked me about my school and which school i like the most and why?
  • Q29. She asked me about my family
  • Q30. What is my favourite subject?
  • Ans. 

    My favourite subject is Computer Science.

    • I enjoy programming and problem-solving.

    • I find algorithms and data structures fascinating.

    • I am interested in artificial intelligence and machine learning.

    • I like learning about new technologies and keeping up with industry trends.

  • Answered by AI
  • Q31. Have i ever been to delhi?
  • Q32. Why do I choose NIT Hamirpur? what do i like about Hamirpur?
  • Ans. 

    I choose NIT Hamirpur because of its excellent academic reputation and beautiful campus.

    • NIT Hamirpur has a strong focus on academics and research, which aligns with my career goals.

    • The campus is located in a serene and picturesque location, which provides a conducive environment for learning.

    • The faculty members are highly experienced and knowledgeable, and are always willing to help students.

    • The college has state-of-th...

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: General aptitude was easy.It was of 30 mins.
Next technical aptitude and coding questions were of 50 mins duration.
Technical aptitude questions were from OS,C,C++,DBMS.Questions were based on basic concepts.
There were 3 coding questions.
1.A girl eat fish of exact length of 10.She can cut the fish to get the desired length.An array of lengths of fish and maximum possible cuts allowed were given.Find out the max number of fish the girl can eat.
2. A 2-D rectangular board which contains sand grains : 'o' ,obstacles: 'x' and empty cells : '.' .The board is kept vertical. The sand grain can move down into and empty cell but it cannot cross obstacle. find out the final position of all sand grains in the board.
3.It was question on subsequence .
Tips: Just keep your basic concepts clear. Practice questions on strings,dynamic programming and recursion.Go through Geeksforgeeks .It'll help you a lot.
Duration: 80mins minutes
Total Questions: 50

Round: Technical Interview
Experience: The interviewer was very calm and polite. He was giving me hints and enough time to solve the questions.
Tips: Keep talking with the interviewer .Discuss your approach. Do take hints they give you.

Round: Technical Interview
Experience: I was stuck in one or two questions but they keep giving me hints. Interviewers were very nice. They were asking me the approach for each question. They were very cool.

Tips: Stay calm and go ahead. Apply whatever basic knowledge you have . keep asking doubts for the questions if you have any.

Round: Technical Interview
Experience: He asked me about my projects. What was my role. It was an hour long round. Enough time was given to solve each question.I was asked to write code with minimum complexity.
Tips: Keep discussing the questions. Try to reach to the best approach .keep smiling.Never fake your resume.

Round: HR Interview
Experience: The HR was very polite.I was a bit nervous at first but then I was relaxed.
Tips: Just be yourself .You are almost done when you are selected for HR. :) Keep Smiling and be confident about what ever you say.

General Tips: Be confident and have clear basic concepts of all subjects.
Skill Tips: Practise as many questions as you can on geeksforgeeks.
Skills: Coding skills, Logical skills, Aptitude, Basic Knowledge of DBMS
College Name: NIT Hamirpur
Motivation: My recent project work related to E-commerce and the reputation and ecstatic growth of the company in recent months.
Funny Moments: after one of the technical round , interviewer asked me if i had any questions about the company.I asked them what kind of rewards will be given .. do you guys go for trips and get any free coupons :P

Skills evaluated in this interview

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

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 Preparation Tips

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

Interview Questionnaire 

7 Questions

  • Q1. Given an array find the number of conitnuous sequences having equal number of 0's and 1's
  • Ans. 

    Count the number of continuous sequences with equal number of 0's and 1's in an array.

    • Iterate through the array and keep track of the count of 0's and 1's encountered so far.

    • Store the difference between the counts in a hash table and increment the count for that difference.

    • If the difference is already present in the hash table, add the count to the existing value.

    • Return the sum of all values in the hash table.

  • Answered by AI
  • Q2. Number of substrngs which are palindrome
  • Ans. 

    Count the number of palindromic substrings in a given string.

    • A substring is a contiguous sequence of characters within a string.

    • A palindrome is a string that reads the same backward as forward.

    • Use dynamic programming to count all palindromic substrings.

    • Time complexity can be reduced to O(n^2) using Manacher's algorithm.

  • Answered by AI
  • Q3. Longest Palindrom in a string in O(n)
  • Ans. 

    Find the longest palindrome in a given string in linear time complexity.

    • Use Manacher's algorithm to find the longest palindrome in a string in O(n) time complexity.

    • The algorithm involves preprocessing the string to add special characters to handle even and odd length palindromes.

    • Then, it uses a combination of dynamic programming and symmetry properties to find the longest palindrome.

    • For example, in the string 'babad',

  • Answered by AI
  • Q4. Find the value of pie
  • Ans. 

    The value of pie is a mathematical constant approximately equal to 3.14159.

    • Pie is the ratio of the circumference of a circle to its diameter.

    • It is an irrational number, meaning it cannot be expressed as a finite decimal or fraction.

    • Pie is commonly used in geometry and trigonometry calculations.

    • The value of pie is often approximated as 3.14 or 22/7.

  • Answered by AI
  • Q5. Project discussion
  • Q6. Tell me about yourself
  • Ans. 

    I am a passionate software engineer with experience in developing web applications using various technologies.

    • Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular

    • Proficient in backend development with Node.js and databases like MongoDB and MySQL

    • Familiar with version control systems like Git and deployment tools like Docker

    • Strong problem-solving skills and ability

  • Answered by AI
  • Q7. Will u be able to fit in the company ?
  • Ans. 

    Yes, I believe I will be able to fit in the company based on my experience, skills, and values.

    • I have experience working in diverse teams and adapting to different work cultures.

    • I share the company's values and vision, which align with my own.

    • I am eager to learn and contribute to the team, fostering a positive work environment.

    • I have strong communication skills, which are essential for collaboration and teamwork.

  • Answered by AI

Interview Preparation Tips

Round: Test
Duration: 20 minutes
Total Questions: 20

Round: Technical Interview
Experience: Nice
Tips: Cormen
Programming contests
Interviewbit.com
geeksforgeeks.com

Round: Technical Interview
Experience: niice
Tips: Cormen
Programming contests
Interviewbit.com
geeksforgeeks.com

Round: Technical Interview
Experience: nice
Tips: do some projects

Round: HR Interview
Experience: nice
Tips: read on google on how to answer such questions

General Tips: geeksforgeeks.com
Skill Tips: Cormen
Programming contests
Interviewbit.com
geeksforgeeks.com
Skills: c , algorithms , data structures
College Name: Delhi Technological University, Delhi

Skills evaluated in this interview

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