Available question text
Design a low-level system for WhatsApp's read receipts feature, handling all three stages of message status: sent, received, and read (blue ticks).
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Hello Interview · 1 record
Amazon
Design WhatsApp Read Receipts
Interview reported: Aug 4, 2026 · 3 source reports
MID_LEVEL, SENIOR
Source snapshot: Nov 12, 2026
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