HardDesign: Notification System
What happens when you try to send a push notification to an invalid/expired device token?
— Tests your understanding of this concept.
Answer Options
AThe notification is delivered anyway
BFCM/APNS returns an error — token should be removed from database
CThe notification is queued until token refreshes
DFCM automatically refreshes the token
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See the Answer on Guru Sishya →This question is from the Design: Notification System topic (System Design Cases).
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