Upload queue design
A user picks 50 photos to upload, and they all have to get there eventually, even if they close the app or lose the network. How would you design the upload queue? Cover retry, resume, ordering, progress display, and duplicate prevention.
iOS system designShort answerBasics
Design the client storage system for a photo sharing app. Focus on where and how you stor…
#photos
iOS system designShort answerAdvanced
Design a photo library app that shows tens of thousands of photos in a grid and backs the…
#photos
iOS system designShort answerAdvanced
An iOS file manager shows a listing, offline files, and upload progress. How would you se…
#upload
ConcurrencyShort answerExpert
Design a MyQueue of your own without GCD. Submitting a closure with async(_:) should run …
#queue