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PayPal Interview Questions and Answers for Freshers
33 Interview questions
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...
Remove Duplicates from String Problem Statement
You are provided a string STR of length N, consisting solely of lowercase English letters.
Your task is to remove all duplicate occurrences of characters in...
Remove duplicate occurrences of characters in a given string.
Use a hash set to keep track of characters seen so far.
Iterate through the string and add non-duplicate characters to a new string.
Return the new string without duplicate characters.
One Away Transformation Problem
Given two strings, A and B, determine whether A can be transformed into B by performing at most one of the following operations (including zero operations):
1. Delete a cha...Determine if one string can be transformed into another by performing at most one operation (insert, delete, replace).
Iterate through both strings simultaneously and check for differences.
Handle cases where a character needs to be inserted, deleted, or replaced.
Keep track of the number of operations performed and ensure it does not exceed one.
Reverse the String Problem Statement
You are given a string STR which contains alphabets, numbers, and special characters. Your task is to reverse the string.
Example:
Input:
STR = "abcde"
Output:
"ed...
Reverse a given string containing alphabets, numbers, and special characters.
Iterate through the string from the end to the beginning and append each character to a new string.
Use built-in functions like reverse() or slicing to reverse the string.
Handle special characters and numbers while reversing the string.
Ensure to consider the constraints on the input string length and number of test cases.
Maximum Difference Problem Statement
Given an array ARR of N elements, your task is to find the maximum difference between any two elements in ARR.
If the maximum difference is even, print EVEN; if it is ...
Find the maximum difference between any two elements in an array and determine if it is even or odd.
Iterate through the array to find the maximum and minimum elements
Calculate the difference between the maximum and minimum elements
Check if the difference is even or odd and return the result
Cycle Detection in Undirected Graph Problem Statement
You are provided with an undirected graph containing 'N' vertices and 'M' edges. The vertices are numbered from 1 to 'N'. Your objective is to determin...
Detect cycles in an undirected graph with given vertices and edges.
Use Depth First Search (DFS) to traverse the graph and detect cycles.
Maintain a visited array to keep track of visited vertices and a parent array to keep track of the parent of each vertex.
If while traversing, you encounter a visited vertex that is not the parent of the current vertex, then a cycle exists.
Consider edge cases like disconnected grap...
Hashing is a process of converting input data into a fixed-size string of bytes using a hash function.
Hashing is used to securely store passwords by converting them into a hash value before storing in a database.
Hashing is used in data structures like hash tables to quickly retrieve data based on a key.
Common hash functions include MD5, SHA-1, and SHA-256.
Hashing can be implemented in programming languages like Py...
Palindrome Partitioning II Problem Statement
Given a string ‘str’, find the minimum number of partitions needed such that every segment of the string is a palindrome.
The task is to make cuts in the strin...
Find the minimum number of partitions needed in a string such that every segment is a palindrome.
Iterate through the string and check for palindromes at each possible partition point.
Use dynamic programming to keep track of the minimum cuts needed.
Consider edge cases where the string is already a palindrome or consists of different characters only.
PayPal Interview Experiences for Freshers
25 interviews found
Anonymous
Selected
I applied via LinkedIn and was interviewed in Nov 2024. There were 3 interview rounds.
Coding test was on HackerRank
(1 Question)
- Q1. Easy-Medium DSA Questions
(1 Question)
- Q1. Asked from my resume
I appeared for an interview in Oct 2024.
(2 Questions)
- Q1. Design Rate Limiter LLD
- Ans.
Design a rate limiter to control the number of requests a user can make in a given time frame.
Define rate limiting strategies: Fixed Window, Sliding Window, Token Bucket.
Use a data store (e.g., Redis) to track request counts per user.
Implement a reset mechanism to clear counts after the time window.
Consider edge cases like burst traffic and user authentication.
Example: Allow 100 requests per hour per user.
- Q2. What are SOLID Principles? Springboot questions
Interview Preparation Tips
- LLD
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.
I applied via Campus Placement and was interviewed in Nov 2023. There were 2 interview rounds.
5 MCQ questions, and 1 coding question similar to Leetcode medium-hard level (topic-greedy).
(2 Questions)
- Q1. Basic DSA questions related to strings, linkedlists, binary search etc.
- Q2. Questions related to resume
Interview Preparation Tips
- DSA
- DBMS
Hackerrank - 1.5 hour
Basic questions of DSA were asked
(2 Questions)
- Q1. Linked Lists, Trees , Arrays
- Q2. Hash maps, oops, Sql
(1 Question)
- Q1. Question related to JD, some basic questions
Interview Preparation Tips
1 coding ques on trees,discussion on project,oops concept,sql query,webd related discussion
(1 Question)
- Q1. Discussion on project,difficulty faced ,how i solved,discussion based on cv
Selected
I applied via Instahyre and was interviewed before Aug 2022. There were 5 interview rounds.
There 2 coding rounds one on online and other on one-one discussion, both including few problem solving on DS and Algo on topics of Trees, Priority Queue, Arrays, DFS
(2 Questions)
- Q1. One of the question was about return min element in stack in constant time (O(1)).
- Ans.
Implement a stack that supports retrieving the minimum element in constant time.
Use an auxiliary stack to keep track of minimum values.
Push the current minimum onto the auxiliary stack whenever a new element is pushed.
When popping an element, also pop from the auxiliary stack if it is the current minimum.
Example: For stack [3, 5, 2], min stack would be [3, 2].
To get min: simply return the top of the min stack.
- Q2. Find the and return if the given file path existing in the given file hierarcy(file system).
- Ans.
Check if a given file path exists in the file system hierarchy and return the result.
Use file system APIs to check if the given file path exists in the hierarchy.
Traverse the file system hierarchy starting from the root directory to find the given file path.
Return true if the file path exists, false otherwise.
(2 Questions)
- Q1. This round was regarding LLD and HLD round, question on java and resume and LLD and HLD. Java 1) why functional interface 2) how would you use and make yuor own functional interface 3) Options class Netwo...
- Q2. Given a usecase to build parking system
- Ans.
Design a parking system to manage vehicle parking efficiently and optimize space usage.
Define user roles: Admin, Driver, and Parking Attendant.
Implement features like real-time availability tracking and reservation.
Use sensors or cameras for automated entry/exit logging.
Integrate payment systems for seamless transactions.
Consider mobile app for users to find and reserve spots.
(1 Question)
- Q1. This round was about lot of conversation with technical, leadership and cultural aspect with my manager
Interview Preparation Tips
Selected
I applied via Naukri.com and was interviewed before Feb 2023. There was 1 interview round.
(1 Question)
- Q1. Communication is needed and know how the chat process or call process works
Interview Preparation Tips
- Communication Skills
I applied via Company Website and was interviewed in Aug 2022. There were 2 interview rounds.
(3 Questions)
- Q1. What did you work for and in which company did you work?
- Q2. And how much do you need salary and which course did you do?
- Ans. Why are you working in the company
- Q3. You have to accept the role of the company
Interview Preparation Tips
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PayPal Interview FAQs
Some of the top questions asked at the PayPal interview for freshers -
The duration of PayPal interview process can vary, but typically it takes about less than 2 weeks to complete.
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Overall Interview Experience Rating
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