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I was interviewed in Aug 2017.
The program reads a file and selects the first 3 lines. It then identifies the longest line and counts the number of words in that line.
Read the file using appropriate file handling methods
Store the first 3 lines in an array of strings
Iterate through the array to find the longest line
Count the number of words in the longest line using string manipulation methods
The question is about finding the shortest path in a 3x3 matrix with weighted edges.
This is a graph traversal problem.
Use a graph algorithm like Dijkstra's algorithm or A* search to find the shortest path.
Assign weights to the edges and calculate the sum of weights for each possible path.
Choose the path with the smallest sum of weights as the shortest path.
The Fibonacci series can be applied in day-to-day life for various purposes.
Financial planning: Fibonacci numbers can be used to calculate investment growth and determine optimal investment strategies.
Architecture and design: Fibonacci ratios can be used to create aesthetically pleasing designs and layouts.
Nature and biology: Fibonacci patterns can be observed in the growth of plants, arrangement of leaves, and formati...
Amazon displays only a subset of search results based on various factors like relevance, popularity, and user preferences.
Amazon uses algorithms to determine which products to display in search results.
Factors considered include product relevance, customer reviews, sales rank, and availability.
Machine learning techniques may be used to personalize search results based on user behavior and preferences.
Amazon also consid...
Hash tables are a data structure that uses a hash function to map keys to values, providing efficient lookup, insertion, and deletion.
Hash tables use a hash function to convert keys into array indices.
They provide constant-time average case complexity for search, insert, and delete operations.
Collisions can occur when different keys map to the same index, which can be resolved using techniques like chaining or open add...
The product will be the key and the brands will be the values.
The key in this case refers to the unique identifier for each product.
The values are the different brands associated with each product.
For example, if the product is a smartphone, the key could be the model number and the values could be the different brands that manufacture that model.
Radix sort is a sorting algorithm that sorts integers by processing individual digits from least significant to most significant.
Radix sort is a non-comparative sorting algorithm.
It sorts numbers by grouping them based on each digit's value.
It is commonly used for sorting strings in lexicographic order.
Radix sort has linear time complexity, making it efficient for large datasets.
Radix sort has a running time of O(nk), where n is the number of elements and k is the length of the longest element.
Radix sort is a non-comparative sorting algorithm that sorts elements by their individual digits or characters.
It works by distributing the elements into 10 buckets based on the value of the least significant digit, then repeatedly redistributing them based on the next significant digit.
The process conti...
O(nk) is better than O(n) for large data and hash tables.
O(nk) is better because it takes into account the size of the data and the number of keys.
For large data and hash tables, the size of n will be large, making O(nk) more efficient.
O(n) assumes a constant number of keys, which may not be the case in practice.
Amazon may have chosen O(nk) for better scalability and performance.
I have worked on various projects including a web application for tracking fitness goals and a mobile app for managing personal finances.
Developed a web application using React and Node.js to track fitness goals and progress
Created a mobile app using Flutter to manage personal finances and budgeting
Collaborated with a team to implement features, fix bugs, and optimize performance
If not selected for PayPal, I will continue applying to other companies, improve my skills, and network with professionals in the industry.
Continue applying to other tech companies for similar roles
Work on improving technical skills through online courses or personal projects
Network with professionals in the industry through events or online platforms like LinkedIn
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...
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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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