Indeed Karat 电面

问了OOD， Testing的知识问题，一般面经都有

Coding 问了
Q1: subdomain 利口
Q2: longest continous user history， Karat题库里有。
Q3: Ad Attribution 题， 没时间写完。

/*
The people who buy ads on our network don't have enough data about how ads are working for their business. They've asked us to find out which ads produce the most purchases on their website.

Our client provided us with a list of user IDs of customers who bought something on a landing page after clicking one of their ads:

# Each u

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Unlock interview details and practice with AI
Curated Interview Questions from Top Companies

at ad's number of clicks, and how many of those ad clicks were from users who made a purchase.

Expected output:

1 of 2         2017 Pet Mittens
0 of 1         The Best Hollywood Coats
3 of 4         Buy wool coats for your pets

purchases: number of purchase IDs
clicks: number of ad clicks
ips: number of IP addresses



*/

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