Lets collaborate the list of E4 product architecture interview questions in this page, if you know any please continue list in comments\n* Design Leetcode (with or without leaderboards)\n* Design Real time commenting system for live videos/events in Facebook/Instagram.\n* Design Instagram Auction system\n* Design Ticket Booking system\n\n\nIf you are anyone you know was interviewing for E4 and was asked any of these question please confirm it in comments.\n\nLet\'s collaborate!

Lets collaborate the list of E4 product architecture interview questions in this page, if you know any please continue list in comments\n Design Leetcode (with 

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