Design Interview questions-3

 

Design Facebook Messenger or WhatsApp (A Global Chat Service)

Things to discuss and analyze: 

·       Approach for one-on-one text messaging between users.

·       Approach for extending the design to support group chats.

·       Delivered and read status

·       What action needs to be taken if the user is not connected to the internet?

·       Push notifications

·       Sending media like images or other documents

·       Approach for providing end-to-end message encryption.