Grokking Modern Mobile System Design Interview
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Stories and Short Video

1. The Question

“Design a mobile short-video feed and expiring stories, with smooth swiping, seen state, and data-saving behavior.”

The main trade-off is faster playback versus bytes and memory spent on content the user may skip. Recording, editing, ranking, and encoding are outside this client example.

Try your own design for ten minutes before reading the walkthrough.

2. The Walkthrough

Use the Five Step Method

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