Comment feed page
Design the comment feed page for a community app. Constraints: comments are shown flat (no tree), globally sorted by an interaction weight (likes, reply count), and the first screen loads automatically. Given that the sort criterion keeps changing, how would you design the server data structure and the pagination?
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 answerAdvanced
An iOS app implements infinite scroll for a photo feed seen by hundreds of millions of us…
#pagination #cursor
CS fundamentals and algorithmsShort answerBasics
In an endless iOS list like a pin board, you want to stop the same item showing twice or …
#pagination #cursor