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Object Oriented Programming is a programming paradigm that uses objects to represent real-world entities.
Encapsulation: bundling data and methods that operate on that data within one unit
Inheritance: creating new classes from existing ones, inheriting their properties and methods
Polymorphism: ability of objects to take on multiple forms or behaviors
Abstraction: hiding complex implementation details and providing a simp...
Abstraction is hiding implementation details while polymorphism is using a single interface for multiple types.
Abstraction: Encapsulation, Interfaces, Abstract classes
Polymorphism: Method Overloading, Method Overriding, Interfaces
Abstraction Example: Car - we don't need to know how the engine works to drive it
Polymorphism Example: Animal - different animals have different sounds but they all have a 'makeSound' method
PayPal is an online payment system that allows individuals and businesses to transfer funds electronically.
Allows users to make payments and money transfers online
Offers a secure and convenient way to pay for goods and services
Provides a platform for businesses to accept payments online
Offers buyer and seller protection for eligible transactions
Can be used to send and receive money internationally
I am excited to join PayPal because of its innovative culture and impact on the global economy.
PayPal's commitment to innovation aligns with my passion for staying up-to-date with the latest technologies.
I am impressed by PayPal's global reach and impact on the economy, and I want to be a part of that.
I appreciate PayPal's focus on diversity and inclusion, and I believe in the importance of working for a company with s...
I was interviewed in Jan 2025.
One question related to object-oriented programming and one question related to data structures and algorithms.
The system design for the checkout feature on Amazon involves request body, API calls, load balancing, database caching, and CDN considerations.
Request body includes user's selected items, shipping address, payment details, etc.
API calls are made to process payment, update inventory, and send confirmation emails.
Load balancing ensures even distribution of traffic across multiple servers to handle checkout requests effi...
I applied via Company Website and was interviewed in Oct 2024. There were 2 interview rounds.
KNN algorithm is a simple and effective machine learning algorithm for classification and regression tasks.
KNN stands for K-Nearest Neighbors.
It is a non-parametric, lazy learning algorithm.
Works by finding the K closest training examples in feature space to a given input data point.
Classification: Assign the most common class among the K nearest neighbors.
Regression: Take the average of the K nearest neighbors' target...
What people are saying about PayPal
I applied via Referral and was interviewed in Nov 2024. There were 3 interview rounds.
Data structures and algo. 2 ques were asked in hackerrank
PayPal interview questions for popular designations
I applied via LinkedIn
Question base on Tree data structures
GC collector in Java is responsible for managing memory by reclaiming unused objects and freeing up memory space.
GC stands for Garbage Collector
Automatically manages memory by reclaiming unused objects
Prevents memory leaks and optimizes memory usage
Different types of GC algorithms like Serial, Parallel, CMS, G1
Example: System.gc() can be used to suggest garbage collection
Design a car rental system at a low level
Use object-oriented programming to model cars, customers, rentals, etc.
Implement a database to store information about available cars, customer bookings, etc.
Include features like booking, returning, and searching for cars
Consider implementing a pricing system based on factors like car type, duration of rental, etc.
Get interview-ready with Top PayPal Interview Questions
I applied via Recruitment Consulltant
Ask about how to implement DQ
I applied via LinkedIn and was interviewed in Oct 2024. There were 2 interview rounds.
Coding questions on DSA
I applied via Recruitment Consulltant and was interviewed in Jun 2024. There were 3 interview rounds.
Encryption of code involves converting plaintext into ciphertext to secure data.
Choose a strong encryption algorithm like AES or RSA
Generate a key for encryption
Encrypt the plaintext using the key and algorithm
Store or transmit the ciphertext securely
Abstraction is hiding the implementation details, function overriding is providing a new implementation for a method in a subclass.
Abstraction involves hiding the complex implementation details and showing only the necessary features to the user.
Function overriding occurs in inheritance when a subclass provides a specific implementation for a method that is already defined in its superclass.
Example: Parent class 'Anima...
I applied via LinkedIn and was interviewed in Nov 2024. There were 3 interview rounds.
Coding test was on HackerRank
I applied via Approached by Company and was interviewed in Aug 2024. There were 2 interview rounds.
Javascript questions on Hacker rank with pair programming
The question involves writing React code in HackerRank.
Understand the requirements of the task before starting to write the code.
Use React components to create a user interface.
Handle state management and user interactions using React hooks.
Write clean and efficient code to solve the problem.
Test the code thoroughly before submitting.
I was interviewed in Oct 2024.
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The duration of PayPal interview process can vary, but typically it takes about less than 2 weeks to complete.
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