Large-scale photo feed pagination
An iOS app implements infinite scroll for a photo feed seen by hundreds of millions of users. How would you design the page key so duplicates and gaps stay low even when the server's ranking changes?
iOS system designShort answerAdvanced
Design an infinite-scroll feed screen like Twitter's from the iOS client's point of view.…
#feed #pagination #cache
iOS system designShort answerBasics
For a mobile feed, would you paginate by offset or by cursor (keyset)? Justify it with th…
#pagination #cursor
iOS system designMultiple choiceBasics
You're loading a feed with offset pagination. While the user is reading page 2, 3 new pos…
#pagination #cursor
iOS system designShort answerExpert
Design the comment feed page for a community app. Constraints: comments are shown flat (n…
#pagination #cursor