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PayPal Software Developer Interview Questions and Answers for Freshers
7 Interview questions
Design a Cinema Ticket Reservation System
Use a database to store movie information, showtimes, and seat availability
Allow users to search for movies, select showtimes, and choose seats
Implement a payment system for ticket purchases
Send confirmation emails with QR codes for ticket validation
OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
OOP focuses on creating objects that interact with each other to solve problems.
Key concepts include encapsulation, inheritance, and polymorphism.
Encapsulation involves bundling data and methods that operate on the data into a single unit.
Inheritance allows classes to inher...
Kth Largest Element Problem
Given an array containing N distinct positive integers and a number K, determine the Kth largest element in the array.
Example:
Input:
N = 6, K = 3, array = [2, 1, 5, 6, 3, 8...
Find the Kth largest element in an array of distinct positive integers.
Sort the array in non-increasing order and return the Kth element.
Handle multiple test cases efficiently.
Ensure all elements in the array are distinct.
SQL query to find the nth highest salary
Use the ORDER BY clause to sort salaries in descending order
Use the LIMIT and OFFSET clauses to skip the first n-1 highest salaries
Combine the above steps in a single query to find the nth highest salary
Delete a Node from a Linked List
You are provided with a linked list of integers. Your task is to implement a function that deletes a node located at a specified position 'POS'.
Input:
The first line con...Implement a function to delete a node from a linked list at a specified position.
Traverse the linked list to find the node at the specified position.
Update the pointers of the previous and next nodes to skip the node to be deleted.
Handle edge cases such as deleting the head or tail of the linked list.
Ensure to free the memory of the deleted node to avoid memory leaks.
Virtual functions are functions in a base class that are overridden in derived classes to achieve runtime polymorphism.
Virtual functions are declared in a base class with the 'virtual' keyword.
They are overridden in derived classes using the 'override' keyword.
They allow a function to be called based on the runtime type of an object.
Virtual functions enable dynamic binding and late binding in C++.
Example: virtual ...
You can find a defective ball among 10 given balls in 2 attempts using a two-pan balance scale.
Divide the 10 balls into two groups of 5 each.
Weigh the two groups on the balance scale.
If one group is heavier, it contains the defective ball. If they are equal, the defective ball is in the remaining 5 balls.
Divide the group of 5 balls with the defective one into two groups of 2 and 3 balls.
Weigh the two groups on the...
PayPal Software Developer Interview Experiences for Freshers
2 interviews found
Sarath
I appeared for an interview in Mar 2025, where I was asked the following questions.
- Q1. They asked about core Java, Spring Boot annotations, SQL joins, and a problem about finding the second largest number—they wanted the time and space complexity too.
- Q2. Springboot annotations.
Anonymous
I appeared for an interview before Jan 2021.
(3 Questions)
Round duration - 60 minutes
Round difficulty - Easy
Technical Interview Round with questions based on Data structures, OOPS and SQL.
- Q1.
Delete a Node from a Linked List
You are provided with a linked list of integers. Your task is to implement a function that deletes a node located at a specified position 'POS'.
Input:
The first line co... - Ans.
Implement a function to delete a node from a linked list at a specified position.
Traverse the linked list to find the node at the specified position.
Update the pointers of the previous and next nodes to skip the node to be deleted.
Handle edge cases such as deleting the head or tail of the linked list.
Ensure to free the memory of the deleted node to avoid memory leaks.
- Q2. Write an SQL query to find the nth highest salary.
- Ans.
SQL query to find the nth highest salary
Use the ORDER BY clause to sort salaries in descending order
Use the LIMIT and OFFSET clauses to skip the first n-1 highest salaries
Combine the above steps in a single query to find the nth highest salary
- Q3. Can you explain the concepts of Object-Oriented Programming (OOP)?
- Ans.
OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
OOP focuses on creating objects that interact with each other to solve problems.
Key concepts include encapsulation, inheritance, and polymorphism.
Encapsulation involves bundling data and methods that operate on the data into a single unit.
Inheritance allows classes to inherit at...
(4 Questions)
Round duration - 60 minutes
Round difficulty - Easy
Was asked me about my favorite technologies, What i liked about Facebook. And asked me to design a cinema ticket reservation web site like the one satyam has.
- Q1.
Kth Largest Element Problem
Given an array containing
Ndistinct positive integers and a numberK, determine the Kth largest element in the array.Example:
Input:
N = 6, K = 3, array = [2, 1, 5, 6, 3, ...
- Ans.
Find the Kth largest element in an array of distinct positive integers.
Sort the array in non-increasing order and return the Kth element.
Handle multiple test cases efficiently.
Ensure all elements in the array are distinct.
- Q2. What are virtual functions?
- Ans.
Virtual functions are functions in a base class that are overridden in derived classes to achieve runtime polymorphism.
Virtual functions are declared in a base class with the 'virtual' keyword.
They are overridden in derived classes using the 'override' keyword.
They allow a function to be called based on the runtime type of an object.
Virtual functions enable dynamic binding and late binding in C++.
Example: virtual void ...
- Q3. Design a Cinema Ticket Reservation System.
- Ans.
Design a Cinema Ticket Reservation System
Use a database to store movie information, showtimes, and seat availability
Allow users to search for movies, select showtimes, and choose seats
Implement a payment system for ticket purchases
Send confirmation emails with QR codes for ticket validation
- Q4. In how many attempts can you find a defective ball among 10 given balls using a two-pan balance scale?
- Ans.
You can find a defective ball among 10 given balls in 2 attempts using a two-pan balance scale.
Divide the 10 balls into two groups of 5 each.
Weigh the two groups on the balance scale.
If one group is heavier, it contains the defective ball. If they are equal, the defective ball is in the remaining 5 balls.
Divide the group of 5 balls with the defective one into two groups of 2 and 3 balls.
Weigh the two groups on the bala...
(1 Question)
Round duration - 30 minutes
Round difficulty - Easy
HR round that lasted for about 30 minutes. The interviewer asked me questions to know more about me and a puzzle.
- Q1. Can you tell me about your projects and your extracurricular activities?
Interview Preparation Tips
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.
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.
Skills evaluated in this interview
Top trending discussions
Interview questions from similar companies
Pranav Bhat Thirthahalli
Interview Questionnaire
14 Questions
- Q1. What is race condition and how can it be eliminated
- Ans.
Race condition is a situation where multiple threads/processes access and manipulate shared data simultaneously.
It can be eliminated by using synchronization techniques like locks, semaphores, and mutexes.
Another way is to use atomic operations that ensure the data is accessed and modified atomically.
Using thread-safe data structures can also prevent race conditions.
Example: Two threads trying to increment a shared var...
- Q2. What is JCube?
- Ans.
JCube is a Java library for creating and manipulating Rubik's Cube puzzles.
JCube provides classes for representing Rubik's Cube puzzles and algorithms for solving them.
It supports various cube sizes and can generate random scrambles.
JCube can be used in Java applications or as a standalone command-line tool.
It is open source and available on GitHub.
- Q3. What is regression testing?
- Ans.
Regression testing is the process of testing changes made to a software application to ensure that existing functionality still works.
It is performed after making changes to the software
It ensures that existing functionality is not affected by the changes
It helps to catch any defects or bugs that may have been introduced
It can be automated using testing tools
Examples include retesting after bug fixes, testing after new...
- Q4. Discussion on different sorting techniques
- Q5. Discussion on SQL and SQL optimisaion
- Q6. Software engineering principles
- Ans.
Software engineering principles are the best practices and guidelines for developing high-quality software.
Software should be designed with modularity and scalability in mind.
Code should be well-documented and easy to read.
Testing and debugging should be an integral part of the development process.
Version control should be used to manage code changes.
Security and privacy should be considered throughout the development ...
- Q7. Java and OOP's question
- Q8. Define Singleton class
- Ans.
A Singleton class is a class that can only have one instance at a time.
It restricts the instantiation of a class to a single object.
It provides a global point of access to that instance.
It is often used in situations where a single object is required to coordinate actions across a system.
Example: Database connection manager, Configuration manager, Logger manager.
- Q9. Explain Testing principles and Design principles
- Ans.
Testing principles ensure software quality, while design principles guide software development.
Testing principles include unit testing, integration testing, and acceptance testing.
Design principles include SOLID, DRY, and KISS.
Testing principles ensure that software meets requirements and is free of defects.
Design principles guide software development to be modular, maintainable, and scalable.
- Q10. Types of machine learning and methods and examples, they may give you a situation and ask you which technique is good and why
- Q11. Why choose you for VISA?
- Ans.
I have the necessary skills, experience, and passion to contribute to VISA's success.
I have a strong background in software development and have worked on projects similar to those at VISA.
I am a quick learner and can adapt to new technologies and programming languages easily.
I am passionate about creating high-quality software that meets the needs of users and exceeds their expectations.
I am a team player and can work...
- Q12. Which profile is good for you?
- Ans.
A profile that challenges me to learn and grow while allowing me to contribute to a team.
A position that encourages continuous learning and development
A role that allows me to collaborate with a team and contribute to projects
A company culture that aligns with my values and work ethic
- Q13. About the work culture at VISA Inc
- Q14. If u already have a placement, why this company
- Ans.
I am interested in exploring new opportunities and challenges that this company can offer.
I am impressed with the company's reputation and growth potential.
I am excited about the projects and technologies this company is working on.
I believe this company can provide me with a better work-life balance and career growth opportunities.
I am looking for a company culture that aligns with my values and goals.
I am open to exp...
Interview Preparation Tips
Experience: Online Test on mettl.com
- 2 coding questions ( 15*2 = 30 marks ) - Moderate level
- 10 MCQs on Programming and Java ( 1*10 = 10)
- 6 MCQs on Machine Learning and Hadoop ( 1*6 = 6 )
- 6 MCQs on Computer Networks ( 1*6 = 6 )
- 6 MCQs on Computer Infrastructure and Architecture ( 1*6 = 6)
- 6 MCQs on Application security and Cryptography ( 1*6 = 6)
15 shortlisted from here including 8 B.Techs and 7 M.Techs for F2F interviews, which were taken by VISA employees from their US and Singapore offices( since they don't have any office at India ).
Round: Technical Interview
Experience: They may give you a situation and ask you to explain which Software engineering principles will you use. They ask you how will you explain the concept of stacks and queues to a 7 year old, or to a granny, so as to encourage programming(like seriously ? )
General Tips: Nothing as such, since this was my second on-campus placement, I had good experience of interviews.
Keep your fundamentals in all computer science subjects open. Unlike other companies they don't focus much on coding alone. The only other company which also looks at perfection in all computer science aspects is Xerox Research Center India.
Challenging and Equally rewarding, but seriously a unique experience with no much tension
Skills:
College Name: NIT Surathkal
Skills evaluated in this interview
Interview Questionnaire
1 Question
- Q1. Tell me about your project ( written in language)?
- Ans.
Developed a web application using Python and Django framework for managing inventory and sales.
Used Python programming language for backend development
Implemented Django framework for building web application
Designed database schema for inventory and sales data
Integrated frontend using HTML, CSS, and JavaScript
Implemented user authentication and authorization features
Interview Preparation Tips
Experience: They asked 3 question on data structures .
1.Merging linekd list
2 and 3 BST related
Duration: 1 hour
Total Questions: 3
Round: Technical Interview
Experience: Interviewer asked me to explain projects which I had mentioned in Resume. Then He asked me to implement a problem on basis of my project.
It was telephonic round.
CGPA and my project mattered.
College Name: IIT Roorkee
Arpan Paul
I applied via Campus Placement and was interviewed in Sep 2016. There were 4 interview rounds.
Interview Questionnaire
7 Questions
- Q1. Tell me about yourself
- Ans.
I am a passionate software developer with experience in Java, Python, and web development.
Experienced in Java, Python, and web development technologies
Strong problem-solving skills
Team player with excellent communication skills
- Q2. Explain your resume
- Ans.
My resume highlights my experience in software development and showcases my skills in various programming languages and technologies.
Worked on multiple projects using Java, Python, and C++
Developed web applications using HTML, CSS, and JavaScript
Experience with databases such as MySQL and MongoDB
Familiarity with Agile methodology and version control systems like Git
Participated in hackathons and coding competitions
- Q3. Questions on projects mentioned
- Q4. Why do you want to go for VISA?
- Ans.
I want to go for VISA to explore new opportunities and gain international experience.
To gain exposure to different cultures and work environments
To expand my skill set and learn new technologies
To work on challenging projects and contribute to the growth of the company
To build a global network of professionals and enhance my career prospects
- Q5. Code a basic binary tree
- Ans.
A binary tree is a data structure in which each node has at most two children.
Start with a root node
Each node has a left and right child
Nodes can be added or removed
Traversal can be done in-order, pre-order, or post-order
- Q6. Code a basic linked list
- Ans.
Code a basic linked list
Create a Node class with data and next pointer
Create a LinkedList class with head pointer
Implement methods to add, delete, and search nodes in the linked list
- Q7. Code a circular linked list
- Ans.
A circular linked list is a data structure where the last node points back to the first node, forming a loop.
Create a Node class with data and next pointer
Initialize the head node and set its next pointer to itself
To add a node, create a new node and set its next pointer to the head node's next pointer, then update the head node's next pointer to the new node
To traverse the circular linked list, start from the head nod...
Interview Preparation Tips
Experience: It was a programming test hosted on hackerrank. A total of 3 questions. I could solve only one of them. That too only a few test cases. Still got shortlisted for the next round. :)
Tips: Do practice a few challenges on programming platforms. Brush up your programming knowledge.
Total Questions: 3
Round: Technical Interview
Experience: It was an HR cum Technical round for me as I came from a non CS background. I was able to convince them I am a perfect fit for VISA
Tips: Do prepare your resume well. If you have coding projects, make sure you are clear with whatever you write. They might quiz you hard on them. Strong knowledge on Data structures and Algorithms will give you an edge.
Skills: Presentation Of Facts In Resume, Basic Coding, Communication, Algorithms And Data Structures
Duration: 2
College Name: IIT Madras
Funny Moments: I am a part of the sponsorship team of our technical and VISA was an associate sponsor for the same the previous year. Hence I had specified this fact in my interview. :P
Skills evaluated in this interview
Interview Preparation Tips
Experience: 4 years og experience
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
- 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
- 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
- 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
- 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
- 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...
- 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.
- 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
- Q21. (looking at my CGPA of 9) You can get a better company. Then Why PAYTM only?
Interview Preparation Tips
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
MAYANK DEEP
Interview Preparation Tips
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
College Name: na
Mohit Gupta
I appeared for an interview 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...
- 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)...
- Ans.
Distribute n robots on Mars to cover the entire area without overlapping, optimizing their paths.
Divide Mars into n zones, each assigned to a robot.
Use GPS coordinates to define boundaries for each robot's area.
Implement a pathfinding algorithm (e.g., A*) for efficient coverage.
Consider terrain types and obstacles when planning routes.
Example: If n=3, divide Mars into 3 equal sections for each robot.
- 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 ...
Interview Preparation Tips
Experience: Simple questions
Duration: 1 hour 10 minutes
Total Questions: 3
College Name: IIT Guwahati
Skills evaluated in this interview
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