Design a chat application
Design a mobile chat application that allows users to send text messages and share images in one-on-one conversations.
Asked at:
Apple
Meta
Question Timeline
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Mid January, 2026
Apple
Senior
The question was more involved around the client side, not the server side. How does client1 make sure to connect with client2? How do they share the data over the socket, and how do they make the client connection secure?
Late November, 2025
Meta
Staff
Mid October, 2025
Meta
Senior
Design the app. Asked clarifying questions and boiled down to a chat app for sharing images, text in 1:1 chat.
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