DoorDash

Basic Calculator III

Buddy Strings

Check if One String Swap Can Make Strings Equal

Count All Valid Pickup and Delivery Options

Count Nodes With the Highest Score

Design a Driver Payout System

Design a High-Volume Delivery Event Pipeline

Design a Notification System for Reddit

Also asked at Airbnb, Microsoft +2

Design a Quota System

Also asked at Snowflake

Design a Ratings and Reviews System

Also asked at Atlassian

Design a Resilient Bootstrap Aggregation API

Design an Online Shopping Cart

Also asked at Uber

Design DoorDash

Also asked at Amazon, Microsoft

Design File System

Design In-Memory File System

Also asked at Snowflake

Design Instagram

Also asked at Amazon, Meta +1

Find K Closest Elements

Fraud Detection System

ML System Design · Also asked at Amazon, Microsoft +4

Koko Eating Bananas

Also asked at Amazon

Making A Large Island

Maximum Profit in Job Scheduling

Also asked at Airbnb, Pinterest +1

Minimum Number of Steps to Make Two Strings Anagram

Also asked at SoFi

Most Profit Assigning Work

Next Greater Element III

Search Suggestions System

Shortest Distance from All Buildings

Also asked at Waymo

Single-Threaded CPU

Also asked at Roblox