Paypal Machine Learning Engineer Interview Questions
Master your tech interview with our curated database of real questions from top companies.
Design RL-based spending limit policy
RL System Design: Per‑User Spending Limits You are designing a reinforcement learning (RL) system to set per-user spending limits in a payments/risk c...
Assess LLMs for fraud detection
LLMs in Fraud Detection: Near-Term vs. Long-Term Roles Context You are designing fraud detection for a large-scale digital payments platform with: - R...
Search a word in a grid
Given a 2D grid of characters and a target word, determine if the word can be traced by moving up, down, left, or right, using each cell at most once....
Maximize ones with limited flips
Given a binary array and an integer k, return the length of the longest contiguous subarray achievable by flipping at most k zeros to ones. Explain an...
Design a traditional fraud detection system
Design an End-to-End Real-Time Payments Fraud Detection System Context: You are designing a fraud detection system for a large-scale online payments p...