Meta

Best Time to Buy and Sell Stock

Also asked at Amazon, Apple +3

Binary Tree Right Side View

Clone Graph

Copy List with Random Pointer

Also asked at Snowflake

Design a Trending Content System

Also asked at Atlassian, Figma

Design a URL Shortener

Also asked at Amazon, Google +3

Design a Web Crawler

Also asked at Atlassian, Google

Design an Ad Event Aggregator

Also asked at Apple, Netflix +2

Design Instagram

Also asked at Amazon, DoorDash +1

Design Messenger

Also asked at Uber

Design Next-Word Prediction for a Mobile Keyboard

Also asked at Google

Design Search Typeahead

Also asked at Amazon, Apple +4

Design TikTok

Also asked at Google

Find First and Last Position of Element in Sorted Array

Also asked at Apple

Harmful Content Detection System

ML System Design · Also asked at Databricks

LRU Cache

Also asked at Amazon, Apple +8

Merge Intervals

Also asked at Amazon, Apple +9

Merge K Sorted Lists

Also asked at Amazon, Apple +5

Merge Sorted Array

Also asked at Microsoft, NVIDIA

Minimum Window Substring

Also asked at SoFi

Next Permutation

Pow(x, n)

Also asked at LinkedIn

Recommendation / Ranking System

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

Simplify Path

Sum Root to Leaf Numbers

Valid Number

Valid Palindrome

Also asked at Apple

Valid Parentheses

Also asked at Google, LinkedIn +3